diff --git a/Cargo.toml b/Cargo.toml
index aabd1ff..cacbea2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -80,6 +80,7 @@ members = [
     "y2023/ex10",
     "y2023/ex11",
     "y2023/ex12",
+    "y2023/ex13",
 ]
 
 [profile.bench]
diff --git a/y2023/ex13/Cargo.toml b/y2023/ex13/Cargo.toml
new file mode 100644
index 0000000..da552bf
--- /dev/null
+++ b/y2023/ex13/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "y2023ex13"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+
+[[bench]]
+name = "bench_y2023ex13"
+harness = false
+
+[dev-dependencies]
+criterion = "0.5.1"
diff --git a/y2023/ex13/README.md b/y2023/ex13/README.md
new file mode 100644
index 0000000..c1724bf
--- /dev/null
+++ b/y2023/ex13/README.md
@@ -0,0 +1,15 @@
+# Day 13: TODO: ADD TITLE HERE
+
+[Check it out on adventofcode.com](https://adventofcode.com/2023/day/13)
+
+## Part One
+
+TODO: ADD DESCRIPTION HERE
+
+Your puzzle answer was `?`. (TODO: )
+
+## Part Two
+
+TODO: ADD DESCRIPTION HERE
+
+Your puzzle answer was `?`. (TODO: )
\ No newline at end of file
diff --git a/y2023/ex13/benches/bench_y2023ex13.rs b/y2023/ex13/benches/bench_y2023ex13.rs
new file mode 100644
index 0000000..6b8a26b
--- /dev/null
+++ b/y2023/ex13/benches/bench_y2023ex13.rs
@@ -0,0 +1,11 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use y2023ex13::{part1, part2};
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let input = include_str!("../input.txt");
+    c.bench_function("y2023ex13::part1", |b| b.iter(|| part1(black_box(input))));
+    c.bench_function("y2023ex13::part2", |b| b.iter(|| part2(black_box(input))));
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);
diff --git a/y2023/ex13/debug.py b/y2023/ex13/debug.py
new file mode 100644
index 0000000..a8ac54d
--- /dev/null
+++ b/y2023/ex13/debug.py
@@ -0,0 +1,30 @@
+grid = """#.###.#..
+#.###.#..
+..##.#.##
+#.####.#.
+#####...#
+#.##.##..
+..##.#...
+##...###.
+.#....#.#
+#..#...##
+#..#.#.##"""
+
+def find_mirror(grid):
+    for r in range(1, len(grid)):
+        above = grid[:r][::-1]
+        below = grid[r:]
+
+        above = above[:len(below)]
+        below = above[:len(above)]
+
+        print(above)
+        print("---")
+        print(below)
+
+        if above == below:
+            return r
+        
+    return 0
+
+print(find_mirror(list(grid.splitlines())))
diff --git a/y2023/ex13/debug.txt b/y2023/ex13/debug.txt
new file mode 100644
index 0000000..32d9149
--- /dev/null
+++ b/y2023/ex13/debug.txt
@@ -0,0 +1,9634 @@
+
+running 1 test
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 3, 4, 6, 7], b (1): [0, 1, 4, 5, 6, 7, 8, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 4, 5, 6, 7, 8, 10], b (2): [0, 1, 5, 7, 8, 9]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 6, 10], b (0): [1, 2, 3, 4, 6, 7]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 5, 7, 8, 9], b (3): [2, 3, 6, 10]
+idx: 2, delta: 2, matching: false, a (4): [2, 3, 6, 10], b (1): [0, 1, 4, 5, 6, 7, 8, 10]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 5, 7, 8, 9], b (0): [1, 2, 3, 4, 6, 7]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [2, 3, 6, 10], b (4): [2, 3, 6, 10]
+idx: 3, delta: 2, matching: true, a (5): [0, 1, 5, 7, 8, 9], b (2): [0, 1, 5, 7, 8, 9]
+idx: 3, delta: 3, matching: true, a (6): [0, 1, 4, 5, 6, 7, 8, 10], b (1): [0, 1, 4, 5, 6, 7, 8, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 3, 6, 10], b (5): [0, 1, 5, 7, 8, 9]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 4, 5, 6, 7, 8, 10], b (3): [2, 3, 6, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 5, 7, 8, 9], b (6): [0, 1, 4, 5, 6, 7, 8, 10]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 5, 6], b (1): [0, 1, 2, 5, 6]
+idx: 0, delta: 0 --- found smudge!
+idx: 0 --- EXITING WITH true
+.##..##
+###..##
+#..##..
+#..##..
+##....#
+.##..##
+##.##.#
+###..##
+.##..##
+..#..#.
+.#.##.#
+100 (vert: 0, horiz: 1)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 5, 8, 10, 11, 12], b (1): [6, 7, 8, 9, 10, 11, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [6, 7, 8, 9, 10, 11, 12], b (2): [1, 4, 6, 7, 10, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [1, 4, 7, 10, 11, 12], b (0): [0, 5, 8, 10, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 4, 6, 7, 10, 11, 12], b (3): [1, 4, 7, 10, 11, 12]
+idx: 2, delta: 0 --- found smudge!
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 4, 5, 6, 10, 11], b (1): [6, 7, 8, 9, 10, 11, 12]
+idx: 2, delta: 2 --- found smudge twice!
+idx: 3, delta: 0, matching: false, a (3): [1, 4, 7, 10, 11, 12], b (4): [0, 1, 4, 5, 6, 10, 11]
+idx: 3, delta: 2, matching: false, a (5): [2, 3, 7, 8, 9, 10, 11, 12], b (2): [1, 4, 6, 7, 10, 11, 12]
+idx: 3, delta: 3, matching: false, a (6): [1, 4, 6, 11, 12], b (1): [6, 7, 8, 9, 10, 11, 12]
+idx: 3, delta: 4, matching: false, a (7): [0, 5, 6, 7, 8, 10], b (0): [0, 5, 8, 10, 11, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 4, 5, 6, 10, 11], b (5): [2, 3, 7, 8, 9, 10, 11, 12]
+idx: 4, delta: 2, matching: false, a (6): [1, 4, 6, 11, 12], b (3): [1, 4, 7, 10, 11, 12]
+idx: 4, delta: 3, matching: false, a (7): [0, 5, 6, 7, 8, 10], b (2): [1, 4, 6, 7, 10, 11, 12]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 4, 5, 6, 9, 11, 12], b (1): [6, 7, 8, 9, 10, 11, 12]
+idx: 4, delta: 5, matching: false, a (9): [1, 2, 3, 4, 9, 11, 12], b (0): [0, 5, 8, 10, 11, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 3, 7, 8, 9, 10, 11, 12], b (6): [1, 4, 6, 11, 12]
+idx: 5, delta: 2, matching: false, a (7): [0, 5, 6, 7, 8, 10], b (4): [0, 1, 4, 5, 6, 10, 11]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 4, 5, 6, 9, 11, 12], b (3): [1, 4, 7, 10, 11, 12]
+idx: 5, delta: 4, matching: false, a (9): [1, 2, 3, 4, 9, 11, 12], b (2): [1, 4, 6, 7, 10, 11, 12]
+idx: 5, delta: 5, matching: false, a (10): [0, 2, 3, 5, 6, 7, 10], b (1): [6, 7, 8, 9, 10, 11, 12]
+idx: 5, delta: 6, matching: false, a (11): [2, 3, 6, 9], b (0): [0, 5, 8, 10, 11, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 4, 6, 11, 12], b (7): [0, 5, 6, 7, 8, 10]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 4, 5, 6, 9, 11, 12], b (5): [2, 3, 7, 8, 9, 10, 11, 12]
+idx: 6, delta: 3, matching: false, a (9): [1, 2, 3, 4, 9, 11, 12], b (4): [0, 1, 4, 5, 6, 10, 11]
+idx: 6, delta: 4, matching: false, a (10): [0, 2, 3, 5, 6, 7, 10], b (3): [1, 4, 7, 10, 11, 12]
+idx: 6, delta: 5, matching: false, a (11): [2, 3, 6, 9], b (2): [1, 4, 6, 7, 10, 11, 12]
+idx: 6, delta: 6, matching: false, a (12): [1, 2, 3, 4, 6, 7, 9], b (1): [6, 7, 8, 9, 10, 11, 12]
+idx: 6, delta: 7, matching: false, a (13): [0, 2, 3, 5, 8, 10], b (0): [0, 5, 8, 10, 11, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 5, 6, 7, 8, 10], b (8): [0, 1, 4, 5, 6, 9, 11, 12]
+idx: 7, delta: 2, matching: false, a (9): [1, 2, 3, 4, 9, 11, 12], b (6): [1, 4, 6, 11, 12]
+idx: 7, delta: 3, matching: false, a (10): [0, 2, 3, 5, 6, 7, 10], b (5): [2, 3, 7, 8, 9, 10, 11, 12]
+idx: 7, delta: 4, matching: false, a (11): [2, 3, 6, 9], b (4): [0, 1, 4, 5, 6, 10, 11]
+idx: 7, delta: 5, matching: false, a (12): [1, 2, 3, 4, 6, 7, 9], b (3): [1, 4, 7, 10, 11, 12]
+idx: 7, delta: 6, matching: false, a (13): [0, 2, 3, 5, 8, 10], b (2): [1, 4, 6, 7, 10, 11, 12]
+idx: 7, delta: 7, matching: false, a (14): [0, 5, 7, 10], b (1): [6, 7, 8, 9, 10, 11, 12]
+idx: 7, delta: 8, matching: false, a (15): [1, 2, 3, 4, 6, 8, 9, 11, 12], b (0): [0, 5, 8, 10, 11, 12]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 4, 5, 6, 9, 11, 12], b (9): [1, 2, 3, 4, 9, 11, 12]
+idx: 8, delta: 2, matching: false, a (10): [0, 2, 3, 5, 6, 7, 10], b (7): [0, 5, 6, 7, 8, 10]
+idx: 8, delta: 3, matching: false, a (11): [2, 3, 6, 9], b (6): [1, 4, 6, 11, 12]
+idx: 8, delta: 4, matching: false, a (12): [1, 2, 3, 4, 6, 7, 9], b (5): [2, 3, 7, 8, 9, 10, 11, 12]
+idx: 8, delta: 5, matching: false, a (13): [0, 2, 3, 5, 8, 10], b (4): [0, 1, 4, 5, 6, 10, 11]
+idx: 8, delta: 6, matching: false, a (14): [0, 5, 7, 10], b (3): [1, 4, 7, 10, 11, 12]
+idx: 8, delta: 7, matching: false, a (15): [1, 2, 3, 4, 6, 8, 9, 11, 12], b (2): [1, 4, 6, 7, 10, 11, 12]
+idx: 8, delta: 8, matching: false, a (16): [1, 2, 3, 4, 6, 7, 10], b (1): [6, 7, 8, 9, 10, 11, 12]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 2, 3, 4, 9, 11, 12], b (10): [0, 2, 3, 5, 6, 7, 10]
+idx: 9, delta: 2, matching: false, a (11): [2, 3, 6, 9], b (8): [0, 1, 4, 5, 6, 9, 11, 12]
+idx: 9, delta: 3, matching: false, a (12): [1, 2, 3, 4, 6, 7, 9], b (7): [0, 5, 6, 7, 8, 10]
+idx: 9, delta: 4, matching: false, a (13): [0, 2, 3, 5, 8, 10], b (6): [1, 4, 6, 11, 12]
+idx: 9, delta: 5, matching: false, a (14): [0, 5, 7, 10], b (5): [2, 3, 7, 8, 9, 10, 11, 12]
+idx: 9, delta: 6, matching: false, a (15): [1, 2, 3, 4, 6, 8, 9, 11, 12], b (4): [0, 1, 4, 5, 6, 10, 11]
+idx: 9, delta: 7, matching: false, a (16): [1, 2, 3, 4, 6, 7, 10], b (3): [1, 4, 7, 10, 11, 12]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 2, 3, 5, 6, 7, 10], b (11): [2, 3, 6, 9]
+idx: 10, delta: 2, matching: false, a (12): [1, 2, 3, 4, 6, 7, 9], b (9): [1, 2, 3, 4, 9, 11, 12]
+idx: 10, delta: 3, matching: false, a (13): [0, 2, 3, 5, 8, 10], b (8): [0, 1, 4, 5, 6, 9, 11, 12]
+idx: 10, delta: 4, matching: false, a (14): [0, 5, 7, 10], b (7): [0, 5, 6, 7, 8, 10]
+idx: 10, delta: 5, matching: false, a (15): [1, 2, 3, 4, 6, 8, 9, 11, 12], b (6): [1, 4, 6, 11, 12]
+idx: 10, delta: 6, matching: false, a (16): [1, 2, 3, 4, 6, 7, 10], b (5): [2, 3, 7, 8, 9, 10, 11, 12]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [2, 3, 6, 9], b (12): [1, 2, 3, 4, 6, 7, 9]
+idx: 11, delta: 2, matching: false, a (13): [0, 2, 3, 5, 8, 10], b (10): [0, 2, 3, 5, 6, 7, 10]
+idx: 11, delta: 3, matching: false, a (14): [0, 5, 7, 10], b (9): [1, 2, 3, 4, 9, 11, 12]
+idx: 11, delta: 4, matching: false, a (15): [1, 2, 3, 4, 6, 8, 9, 11, 12], b (8): [0, 1, 4, 5, 6, 9, 11, 12]
+idx: 11, delta: 5, matching: false, a (16): [1, 2, 3, 4, 6, 7, 10], b (7): [0, 5, 6, 7, 8, 10]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [1, 2, 3, 4, 6, 7, 9], b (13): [0, 2, 3, 5, 8, 10]
+idx: 12, delta: 2, matching: false, a (14): [0, 5, 7, 10], b (11): [2, 3, 6, 9]
+idx: 12, delta: 3, matching: false, a (15): [1, 2, 3, 4, 6, 8, 9, 11, 12], b (10): [0, 2, 3, 5, 6, 7, 10]
+idx: 12, delta: 4, matching: false, a (16): [1, 2, 3, 4, 6, 7, 10], b (9): [1, 2, 3, 4, 9, 11, 12]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 2, 3, 5, 8, 10], b (14): [0, 5, 7, 10]
+idx: 13, delta: 2, matching: false, a (15): [1, 2, 3, 4, 6, 8, 9, 11, 12], b (12): [1, 2, 3, 4, 6, 7, 9]
+idx: 13, delta: 3, matching: false, a (16): [1, 2, 3, 4, 6, 7, 10], b (11): [2, 3, 6, 9]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [0, 5, 7, 10], b (15): [1, 2, 3, 4, 6, 8, 9, 11, 12]
+idx: 14, delta: 2, matching: false, a (16): [1, 2, 3, 4, 6, 7, 10], b (13): [0, 2, 3, 5, 8, 10]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: false, a (15): [1, 2, 3, 4, 6, 8, 9, 11, 12], b (16): [1, 2, 3, 4, 6, 7, 10]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 4, 7, 8, 10, 13, 14], b (1): [2, 3, 4, 6, 8, 9, 12, 15, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 3, 4, 6, 8, 9, 12, 15, 16], b (2): [5, 9, 10, 11, 12, 13, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [5, 9, 10, 11, 12, 13, 15, 16], b (0): [0, 4, 7, 8, 10, 13, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: true, a (2): [5, 9, 10, 11, 12, 13, 15, 16], b (3): [5, 9, 10, 11, 12, 13, 15, 16]
+idx: 2, delta: 2, matching: true, a (4): [2, 3, 4, 6, 8, 9, 12, 15, 16], b (1): [2, 3, 4, 6, 8, 9, 12, 15, 16]
+idx: 2, delta: 3, matching: true, a (5): [0, 4, 7, 8, 10, 13, 14], b (0): [0, 4, 7, 8, 10, 13, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [5, 9, 10, 11, 12, 13, 15, 16], b (4): [2, 3, 4, 6, 8, 9, 12, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [0, 4, 7, 8, 10, 13, 14], b (2): [5, 9, 10, 11, 12, 13, 15, 16]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 4, 6, 7, 8, 10, 11, 12, 15, 16], b (1): [2, 3, 4, 6, 8, 9, 12, 15, 16]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 3, 5, 7, 10, 12, 14, 16], b (0): [0, 4, 7, 8, 10, 13, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 3, 4, 6, 8, 9, 12, 15, 16], b (5): [0, 4, 7, 8, 10, 13, 14]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 4, 6, 7, 8, 10, 11, 12, 15, 16], b (3): [5, 9, 10, 11, 12, 13, 15, 16]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 3, 5, 7, 10, 12, 14, 16], b (2): [5, 9, 10, 11, 12, 13, 15, 16]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 5, 7, 13, 15], b (1): [2, 3, 4, 6, 8, 9, 12, 15, 16]
+idx: 4, delta: 5, matching: false, a (9): [1, 5, 8, 9, 11, 12, 15], b (0): [0, 4, 7, 8, 10, 13, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 4, 7, 8, 10, 13, 14], b (6): [1, 2, 4, 6, 7, 8, 10, 11, 12, 15, 16]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 3, 5, 7, 10, 12, 14, 16], b (4): [2, 3, 4, 6, 8, 9, 12, 15, 16]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 5, 7, 13, 15], b (3): [5, 9, 10, 11, 12, 13, 15, 16]
+idx: 5, delta: 4, matching: false, a (9): [1, 5, 8, 9, 11, 12, 15], b (2): [5, 9, 10, 11, 12, 13, 15, 16]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 2, 3, 4, 5, 7, 10, 13, 14, 16], b (1): [2, 3, 4, 6, 8, 9, 12, 15, 16]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6, 8, 9, 15], b (0): [0, 4, 7, 8, 10, 13, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 4, 6, 7, 8, 10, 11, 12, 15, 16], b (7): [1, 2, 3, 5, 7, 10, 12, 14, 16]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 5, 7, 13, 15], b (5): [0, 4, 7, 8, 10, 13, 14]
+idx: 6, delta: 3, matching: false, a (9): [1, 5, 8, 9, 11, 12, 15], b (4): [2, 3, 4, 6, 8, 9, 12, 15, 16]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 2, 3, 4, 5, 7, 10, 13, 14, 16], b (3): [5, 9, 10, 11, 12, 13, 15, 16]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6, 8, 9, 15], b (2): [5, 9, 10, 11, 12, 13, 15, 16]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 2, 3, 5, 6, 8, 9, 15], b (1): [2, 3, 4, 6, 8, 9, 12, 15, 16]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 3, 5, 7, 10, 12, 14, 16], b (8): [0, 1, 5, 7, 13, 15]
+idx: 7, delta: 2, matching: false, a (9): [1, 5, 8, 9, 11, 12, 15], b (6): [1, 2, 4, 6, 7, 8, 10, 11, 12, 15, 16]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 2, 3, 4, 5, 7, 10, 13, 14, 16], b (5): [0, 4, 7, 8, 10, 13, 14]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6, 8, 9, 15], b (4): [2, 3, 4, 6, 8, 9, 12, 15, 16]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 2, 3, 5, 6, 8, 9, 15], b (3): [5, 9, 10, 11, 12, 13, 15, 16]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 5, 7, 13, 15], b (9): [1, 5, 8, 9, 11, 12, 15]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 2, 3, 4, 5, 7, 10, 13, 14, 16], b (7): [1, 2, 3, 5, 7, 10, 12, 14, 16]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6, 8, 9, 15], b (6): [1, 2, 4, 6, 7, 8, 10, 11, 12, 15, 16]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 2, 3, 5, 6, 8, 9, 15], b (5): [0, 4, 7, 8, 10, 13, 14]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 5, 8, 9, 11, 12, 15], b (10): [0, 1, 2, 3, 4, 5, 7, 10, 13, 14, 16]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6, 8, 9, 15], b (8): [0, 1, 5, 7, 13, 15]
+idx: 9, delta: 3, matching: false, a (12): [0, 1, 2, 3, 5, 6, 8, 9, 15], b (7): [1, 2, 3, 5, 7, 10, 12, 14, 16]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 2, 3, 4, 5, 7, 10, 13, 14, 16], b (11): [0, 1, 2, 3, 4, 5, 6, 8, 9, 15]
+idx: 10, delta: 2, matching: false, a (12): [0, 1, 2, 3, 5, 6, 8, 9, 15], b (9): [1, 5, 8, 9, 11, 12, 15]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6, 8, 9, 15], b (12): [0, 1, 2, 3, 5, 6, 8, 9, 15]
+idx: 11, delta: 0 --- found smudge!
+idx: 11 --- EXITING WITH true
+ 0 #...#..##.#..##..
+ 1 ..###.#.##..#..##
+ 2 .....#...#####.##
+ 3 .....#...#####.##
+ 4 ..###.#.##..#..##
+ 5 #...#..##.#..##..
+ 6 .##.#.###.###..##
+ 7 .###.#.#..#.#.#.#
+ 8 ##...#.#.....#.#.
+ 9 .#...#..##.##..#.
+10 ######.#..#..##.#
+11 #######.##.....#.
+12 ####.##.##.....#.
+1200 (vert: 0, horiz: 12)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 6, 7, 9, 10, 11], b (1): [0, 1, 2, 3, 4, 5, 8, 11, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 3, 4, 5, 8, 11, 12], b (2): [0, 1, 2, 3, 4, 8, 9, 10, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 6, 7, 8, 11], b (0): [0, 2, 6, 7, 9, 10, 11]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 4, 8, 9, 10, 11, 12], b (3): [0, 1, 2, 3, 6, 7, 8, 11]
+idx: 2, delta: 2, matching: false, a (4): [1, 6, 10], b (1): [0, 1, 2, 3, 4, 5, 8, 11, 12]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 4, 5, 6, 8, 9], b (0): [0, 2, 6, 7, 9, 10, 11]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 3, 6, 7, 8, 11], b (4): [1, 6, 10]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 4, 5, 6, 8, 9], b (2): [0, 1, 2, 3, 4, 8, 9, 10, 11, 12]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 3, 4, 5, 6, 8, 9], b (1): [0, 1, 2, 3, 4, 5, 8, 11, 12]
+idx: 3, delta: 4, matching: false, a (7): [1, 6, 10], b (0): [0, 2, 6, 7, 9, 10, 11]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 6, 10], b (5): [0, 2, 3, 4, 5, 6, 8, 9]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 3, 4, 5, 6, 8, 9], b (3): [0, 1, 2, 3, 6, 7, 8, 11]
+idx: 4, delta: 3, matching: false, a (7): [1, 6, 10], b (2): [0, 1, 2, 3, 4, 8, 9, 10, 11, 12]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 3, 6, 7, 8, 9, 11], b (1): [0, 1, 2, 3, 4, 5, 8, 11, 12]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 3, 4, 8, 9, 10, 11, 12], b (0): [0, 2, 6, 7, 9, 10, 11]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: true, a (5): [0, 2, 3, 4, 5, 6, 8, 9], b (6): [0, 2, 3, 4, 5, 6, 8, 9]
+idx: 5, delta: 2, matching: true, a (7): [1, 6, 10], b (4): [1, 6, 10]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 3, 6, 7, 8, 9, 11], b (3): [0, 1, 2, 3, 6, 7, 8, 11]
+idx: 5, delta: 3 --- found smudge!
+idx: 5, delta: 4, matching: true, a (9): [0, 1, 2, 3, 4, 8, 9, 10, 11, 12], b (2): [0, 1, 2, 3, 4, 8, 9, 10, 11, 12]
+idx: 5, delta: 5, matching: true, a (10): [0, 1, 2, 3, 4, 5, 8, 11, 12], b (1): [0, 1, 2, 3, 4, 5, 8, 11, 12]
+idx: 5, delta: 6, matching: true, a (11): [0, 2, 6, 7, 9, 10, 11], b (0): [0, 2, 6, 7, 9, 10, 11]
+idx: 5 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 13, 14], b (1): [1, 2, 3, 4, 7, 8, 9, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 3, 4, 7, 8, 9, 10], b (2): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 13, 14]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 3, 5, 6, 8, 9, 10, 12, 13], b (0): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 13, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 13, 14], b (3): [1, 2, 3, 5, 6, 8, 9, 10, 12, 13]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 5, 6, 9, 10], b (1): [1, 2, 3, 4, 7, 8, 9, 10]
+idx: 2, delta: 3, matching: false, a (5): [1, 5, 6, 10, 12, 13], b (0): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 13, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 3, 5, 6, 8, 9, 10, 12, 13], b (4): [1, 2, 5, 6, 9, 10]
+idx: 3, delta: 2, matching: false, a (5): [1, 5, 6, 10, 12, 13], b (2): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 13, 14]
+idx: 3, delta: 3, matching: false, a (6): [0, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14], b (1): [1, 2, 3, 4, 7, 8, 9, 10]
+idx: 3, delta: 4, matching: false, a (7): [0, 3, 8, 11, 12, 13, 14], b (0): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 13, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 5, 6, 9, 10], b (5): [1, 5, 6, 10, 12, 13]
+idx: 4, delta: 2, matching: false, a (6): [0, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14], b (3): [1, 2, 3, 5, 6, 8, 9, 10, 12, 13]
+idx: 4, delta: 3, matching: false, a (7): [0, 3, 8, 11, 12, 13, 14], b (2): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 13, 14]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 3, 5, 6, 8, 9, 10, 12, 13], b (1): [1, 2, 3, 4, 7, 8, 9, 10]
+idx: 4, delta: 5, matching: false, a (9): [0, 2, 5, 6, 8, 9, 11, 12, 13, 14], b (0): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 13, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 5, 6, 10, 12, 13], b (6): [0, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14]
+idx: 5, delta: 2, matching: false, a (7): [0, 3, 8, 11, 12, 13, 14], b (4): [1, 2, 5, 6, 9, 10]
+idx: 5, delta: 3, matching: true, a (8): [1, 2, 3, 5, 6, 8, 9, 10, 12, 13], b (3): [1, 2, 3, 5, 6, 8, 9, 10, 12, 13]
+idx: 5, delta: 4, matching: false, a (9): [0, 2, 5, 6, 8, 9, 11, 12, 13, 14], b (2): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 13, 14]
+idx: 5, delta: 5, matching: false, a (10): [0, 2, 4, 7, 9, 11, 14], b (1): [1, 2, 3, 4, 7, 8, 9, 10]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2, 3, 8, 9, 10, 11, 12, 13, 14], b (0): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 13, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14], b (7): [0, 3, 8, 11, 12, 13, 14]
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 3, 5, 6, 8, 9, 10, 12, 13], b (5): [1, 5, 6, 10, 12, 13]
+idx: 6, delta: 3, matching: false, a (9): [0, 2, 5, 6, 8, 9, 11, 12, 13, 14], b (4): [1, 2, 5, 6, 9, 10]
+idx: 6, delta: 4, matching: false, a (10): [0, 2, 4, 7, 9, 11, 14], b (3): [1, 2, 3, 5, 6, 8, 9, 10, 12, 13]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 2, 3, 8, 9, 10, 11, 12, 13, 14], b (2): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 13, 14]
+idx: 6, delta: 6, matching: false, a (12): [1, 2, 9, 10, 12, 13], b (1): [1, 2, 3, 4, 7, 8, 9, 10]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 3, 8, 11, 12, 13, 14], b (8): [1, 2, 3, 5, 6, 8, 9, 10, 12, 13]
+idx: 7, delta: 2, matching: false, a (9): [0, 2, 5, 6, 8, 9, 11, 12, 13, 14], b (6): [0, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14]
+idx: 7, delta: 3, matching: false, a (10): [0, 2, 4, 7, 9, 11, 14], b (5): [1, 5, 6, 10, 12, 13]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 2, 3, 8, 9, 10, 11, 12, 13, 14], b (4): [1, 2, 5, 6, 9, 10]
+idx: 7, delta: 5, matching: false, a (12): [1, 2, 9, 10, 12, 13], b (3): [1, 2, 3, 5, 6, 8, 9, 10, 12, 13]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [1, 2, 3, 5, 6, 8, 9, 10, 12, 13], b (9): [0, 2, 5, 6, 8, 9, 11, 12, 13, 14]
+idx: 8, delta: 2, matching: false, a (10): [0, 2, 4, 7, 9, 11, 14], b (7): [0, 3, 8, 11, 12, 13, 14]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 2, 3, 8, 9, 10, 11, 12, 13, 14], b (6): [0, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14]
+idx: 8, delta: 4, matching: false, a (12): [1, 2, 9, 10, 12, 13], b (5): [1, 5, 6, 10, 12, 13]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 2, 5, 6, 8, 9, 11, 12, 13, 14], b (10): [0, 2, 4, 7, 9, 11, 14]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 2, 3, 8, 9, 10, 11, 12, 13, 14], b (8): [1, 2, 3, 5, 6, 8, 9, 10, 12, 13]
+idx: 9, delta: 3, matching: false, a (12): [1, 2, 9, 10, 12, 13], b (7): [0, 3, 8, 11, 12, 13, 14]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 2, 4, 7, 9, 11, 14], b (11): [0, 1, 2, 3, 8, 9, 10, 11, 12, 13, 14]
+idx: 10, delta: 2, matching: false, a (12): [1, 2, 9, 10, 12, 13], b (9): [0, 2, 5, 6, 8, 9, 11, 12, 13, 14]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 2, 3, 8, 9, 10, 11, 12, 13, 14], b (12): [1, 2, 9, 10, 12, 13]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+####.##.#######
+.####..####....
+####.##.#######
+.###.##.###.##.
+.##..##..##....
+.#...##...#.##.
+#..######..####
+#..#....#..####
+.###.##.###.##.
+#.#..##.##.####
+#.#.#..#.#.#..#
+####....#######
+.##......##.##.
+6 (vert: 6, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 6, 7], b (1): [1, 2, 4, 6, 7, 8, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 4, 6, 7, 8, 9], b (2): [1, 2, 3, 4, 9, 10]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 4, 9, 10], b (0): [0, 6, 7]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 2, 3, 4, 9, 10], b (3): [0, 1, 2, 3, 4, 9, 10]
+idx: 2, delta: 0 --- found smudge!
+idx: 2, delta: 2, matching: false, a (4): [3, 6, 7, 10], b (1): [1, 2, 4, 6, 7, 8, 9]
+idx: 2, delta: 2 --- found smudge twice!
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 3, 4, 9, 10], b (4): [3, 6, 7, 10]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 4, 5, 8, 9], b (2): [1, 2, 3, 4, 9, 10]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 5, 6, 7, 8], b (1): [1, 2, 4, 6, 7, 8, 9]
+idx: 3, delta: 4, matching: false, a (7): [0, 4, 9], b (0): [0, 6, 7]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [3, 6, 7, 10], b (5): [0, 2, 4, 5, 8, 9]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 5, 6, 7, 8], b (3): [0, 1, 2, 3, 4, 9, 10]
+idx: 4, delta: 3, matching: false, a (7): [0, 4, 9], b (2): [1, 2, 3, 4, 9, 10]
+idx: 4, delta: 4, matching: false, a (8): [2, 6, 7], b (1): [1, 2, 4, 6, 7, 8, 9]
+idx: 4, delta: 5, matching: false, a (9): [2, 6, 7], b (0): [0, 6, 7]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 4, 5, 8, 9], b (6): [0, 1, 5, 6, 7, 8]
+idx: 5, delta: 2, matching: false, a (7): [0, 4, 9], b (4): [3, 6, 7, 10]
+idx: 5, delta: 3, matching: false, a (8): [2, 6, 7], b (3): [0, 1, 2, 3, 4, 9, 10]
+idx: 5, delta: 4, matching: false, a (9): [2, 6, 7], b (2): [1, 2, 3, 4, 9, 10]
+idx: 5, delta: 5, matching: false, a (10): [0, 4, 9], b (1): [1, 2, 4, 6, 7, 8, 9]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 5, 6, 7, 8], b (0): [0, 6, 7]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 5, 6, 7, 8], b (7): [0, 4, 9]
+idx: 6, delta: 2, matching: false, a (8): [2, 6, 7], b (5): [0, 2, 4, 5, 8, 9]
+idx: 6, delta: 3, matching: false, a (9): [2, 6, 7], b (4): [3, 6, 7, 10]
+idx: 6, delta: 4, matching: false, a (10): [0, 4, 9], b (3): [0, 1, 2, 3, 4, 9, 10]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 5, 6, 7, 8], b (2): [1, 2, 3, 4, 9, 10]
+idx: 6, delta: 6, matching: false, a (12): [0, 2, 4, 5, 8, 9], b (1): [1, 2, 4, 6, 7, 8, 9]
+idx: 6, delta: 7, matching: false, a (13): [3, 6, 7, 10], b (0): [0, 6, 7]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 4, 9], b (8): [2, 6, 7]
+idx: 7, delta: 2, matching: false, a (9): [2, 6, 7], b (6): [0, 1, 5, 6, 7, 8]
+idx: 7, delta: 3, matching: false, a (10): [0, 4, 9], b (5): [0, 2, 4, 5, 8, 9]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 5, 6, 7, 8], b (4): [3, 6, 7, 10]
+idx: 7, delta: 5, matching: false, a (12): [0, 2, 4, 5, 8, 9], b (3): [0, 1, 2, 3, 4, 9, 10]
+idx: 7, delta: 6, matching: false, a (13): [3, 6, 7, 10], b (2): [1, 2, 3, 4, 9, 10]
+idx: 7, delta: 7, matching: false, a (14): [0, 1, 2, 3, 4, 9, 10], b (1): [1, 2, 4, 6, 7, 8, 9]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: true, a (8): [2, 6, 7], b (9): [2, 6, 7]
+idx: 8, delta: 2, matching: true, a (10): [0, 4, 9], b (7): [0, 4, 9]
+idx: 8, delta: 3, matching: true, a (11): [0, 1, 5, 6, 7, 8], b (6): [0, 1, 5, 6, 7, 8]
+idx: 8, delta: 4, matching: true, a (12): [0, 2, 4, 5, 8, 9], b (5): [0, 2, 4, 5, 8, 9]
+idx: 8, delta: 5, matching: true, a (13): [3, 6, 7, 10], b (4): [3, 6, 7, 10]
+idx: 8, delta: 6, matching: true, a (14): [0, 1, 2, 3, 4, 9, 10], b (3): [0, 1, 2, 3, 4, 9, 10]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [2, 6, 7], b (10): [0, 4, 9]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 5, 6, 7, 8], b (8): [2, 6, 7]
+idx: 9, delta: 3, matching: false, a (12): [0, 2, 4, 5, 8, 9], b (7): [0, 4, 9]
+idx: 9, delta: 4, matching: false, a (13): [3, 6, 7, 10], b (6): [0, 1, 5, 6, 7, 8]
+idx: 9, delta: 5, matching: false, a (14): [0, 1, 2, 3, 4, 9, 10], b (5): [0, 2, 4, 5, 8, 9]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 4, 9], b (11): [0, 1, 5, 6, 7, 8]
+idx: 10, delta: 2, matching: false, a (12): [0, 2, 4, 5, 8, 9], b (9): [2, 6, 7]
+idx: 10, delta: 3, matching: false, a (13): [3, 6, 7, 10], b (8): [2, 6, 7]
+idx: 10, delta: 4, matching: false, a (14): [0, 1, 2, 3, 4, 9, 10], b (7): [0, 4, 9]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 5, 6, 7, 8], b (12): [0, 2, 4, 5, 8, 9]
+idx: 11, delta: 2, matching: false, a (13): [3, 6, 7, 10], b (10): [0, 4, 9]
+idx: 11, delta: 3, matching: false, a (14): [0, 1, 2, 3, 4, 9, 10], b (9): [2, 6, 7]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 2, 4, 5, 8, 9], b (13): [3, 6, 7, 10]
+idx: 12, delta: 2, matching: false, a (14): [0, 1, 2, 3, 4, 9, 10], b (11): [0, 1, 5, 6, 7, 8]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [3, 6, 7, 10], b (14): [0, 1, 2, 3, 4, 9, 10]
+idx: 13 --- EXITING WITH false
+idx: 14 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 3, 5, 6, 7, 10, 11, 12, 14], b (1): [1, 2, 3, 6, 11, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 3, 6, 11, 14], b (2): [1, 2, 3, 5, 8, 9, 12, 14]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 4, 13, 14], b (0): [0, 3, 5, 6, 7, 10, 11, 12, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 2, 3, 5, 8, 9, 12, 14], b (3): [2, 3, 4, 13, 14]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 5, 7, 10, 12, 14], b (1): [1, 2, 3, 6, 11, 14]
+idx: 2, delta: 3, matching: false, a (5): [5, 6, 11, 12], b (0): [0, 3, 5, 6, 7, 10, 11, 12, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 3, 4, 13, 14], b (4): [1, 2, 3, 5, 7, 10, 12, 14]
+idx: 3, delta: 2, matching: false, a (5): [5, 6, 11, 12], b (2): [1, 2, 3, 5, 8, 9, 12, 14]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 4, 6, 8, 9, 11, 13], b (1): [1, 2, 3, 6, 11, 14]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 4, 6, 8, 9, 11, 13], b (0): [0, 3, 5, 6, 7, 10, 11, 12, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 5, 7, 10, 12, 14], b (5): [5, 6, 11, 12]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 4, 6, 8, 9, 11, 13], b (3): [2, 3, 4, 13, 14]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 4, 6, 8, 9, 11, 13], b (2): [1, 2, 3, 5, 8, 9, 12, 14]
+idx: 4, delta: 4, matching: false, a (8): [1, 5, 6, 11, 12], b (1): [1, 2, 3, 6, 11, 14]
+idx: 4, delta: 5, matching: false, a (9): [1, 2, 3, 5, 7, 10, 12, 14], b (0): [0, 3, 5, 6, 7, 10, 11, 12, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [5, 6, 11, 12], b (6): [0, 1, 4, 6, 8, 9, 11, 13]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 4, 6, 8, 9, 11, 13], b (4): [1, 2, 3, 5, 7, 10, 12, 14]
+idx: 5, delta: 3, matching: false, a (8): [1, 5, 6, 11, 12], b (3): [2, 3, 4, 13, 14]
+idx: 5, delta: 4, matching: false, a (9): [1, 2, 3, 5, 7, 10, 12, 14], b (2): [1, 2, 3, 5, 8, 9, 12, 14]
+idx: 5, delta: 5, matching: false, a (10): [2, 3, 4, 13, 14], b (1): [1, 2, 3, 6, 11, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: true, a (6): [0, 1, 4, 6, 8, 9, 11, 13], b (7): [0, 1, 4, 6, 8, 9, 11, 13]
+idx: 6, delta: 2, matching: false, a (8): [1, 5, 6, 11, 12], b (5): [5, 6, 11, 12]
+idx: 6, delta: 2 --- found smudge!
+idx: 6, delta: 3, matching: true, a (9): [1, 2, 3, 5, 7, 10, 12, 14], b (4): [1, 2, 3, 5, 7, 10, 12, 14]
+idx: 6, delta: 4, matching: true, a (10): [2, 3, 4, 13, 14], b (3): [2, 3, 4, 13, 14]
+idx: 6 --- EXITING WITH true
+#..#.###..###.#
+.###..#....#..#
+.###.#..##..#.#
+..###........##
+.###.#.#..#.#.#
+.....##....##..
+##..#.#.##.#.#.
+##..#.#.##.#.#.
+.#...##....##..
+.###.#.#..#.#.#
+..###........##
+700 (vert: 0, horiz: 7)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14], b (1): [0, 1, 6, 7, 8, 9, 14, 15]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 6, 7, 8, 9, 14, 15], b (2): [0, 1, 5, 6, 7, 8, 9, 10, 14, 15]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 4, 5, 10, 11, 12, 13], b (0): [1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 5, 6, 7, 8, 9, 10, 14, 15], b (3): [2, 3, 4, 5, 10, 11, 12, 13]
+idx: 2, delta: 2, matching: false, a (4): [0, 7, 8, 15, 16], b (1): [0, 1, 6, 7, 8, 9, 14, 15]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 5, 6, 9, 10, 13, 14], b (0): [1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 3, 4, 5, 10, 11, 12, 13], b (4): [0, 7, 8, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 5, 6, 9, 10, 13, 14], b (2): [0, 1, 5, 6, 7, 8, 9, 10, 14, 15]
+idx: 3, delta: 3, matching: true, a (6): [0, 1, 6, 7, 8, 9, 14, 15], b (1): [0, 1, 6, 7, 8, 9, 14, 15]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 7, 8, 15, 16], b (5): [1, 2, 5, 6, 9, 10, 13, 14]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 6, 7, 8, 9, 14, 15], b (3): [2, 3, 4, 5, 10, 11, 12, 13]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 5, 6, 9, 10, 13, 14], b (6): [0, 1, 6, 7, 8, 9, 14, 15]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 4, 6], b (1): [0, 1, 2, 5, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 5, 6], b (2): [0, 3, 5]
+idx: 1, delta: 2, matching: false, a (3): [0, 3], b (0): [1, 2, 4, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 5], b (3): [0, 3]
+idx: 2, delta: 0 --- found smudge!
+idx: 2, delta: 2, matching: false, a (4): [0, 3], b (1): [0, 1, 2, 5, 6]
+idx: 2, delta: 2 --- found smudge twice!
+idx: 3, delta: 0, matching: true, a (3): [0, 3], b (4): [0, 3]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 5], b (2): [0, 3, 5]
+idx: 3, delta: 2 --- found smudge!
+idx: 3, delta: 3, matching: true, a (6): [0, 1, 2, 5, 6], b (1): [0, 1, 2, 5, 6]
+idx: 3, delta: 4, matching: true, a (7): [1, 2, 4, 6], b (0): [1, 2, 4, 6]
+idx: 3 --- EXITING WITH true
+.##.#.#
+###..##
+#..#.#.
+#..#...
+#..#...
+#.##.#.
+###..##
+.##.#.#
+.##.#.#
+###..##
+#.##.#.
+#..#...
+#..#...
+#..#.#.
+###..##
+.##.#.#
+....#..
+400 (vert: 0, horiz: 4)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 8, 10, 11, 12], b (1): [4, 5, 6, 7]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [4, 5, 6, 7], b (2): [0, 1, 5, 6, 10, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 5, 6, 8, 9, 11, 12], b (0): [0, 1, 3, 8, 10, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 5, 6, 10, 11, 12], b (3): [2, 3, 5, 6, 8, 9, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 4, 5, 6, 7, 8, 9, 10], b (1): [4, 5, 6, 7]
+idx: 2, delta: 3, matching: false, a (5): [0, 3, 4, 5, 6, 7, 8, 11, 12], b (0): [0, 1, 3, 8, 10, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 3, 5, 6, 8, 9, 11, 12], b (4): [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+idx: 3, delta: 2, matching: false, a (5): [0, 3, 4, 5, 6, 7, 8, 11, 12], b (2): [0, 1, 5, 6, 10, 11, 12]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 10, 11, 12], b (1): [4, 5, 6, 7]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 4, 5, 6, 7, 8, 9, 10], b (5): [0, 3, 4, 5, 6, 7, 8, 11, 12]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 10, 11, 12], b (3): [2, 3, 5, 6, 8, 9, 11, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 3, 4, 5, 6, 7, 8, 11, 12], b (6): [0, 1, 10, 11, 12]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 5, 6], b (1): [0, 2, 4, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 4, 6], b (2): [3, 4]
+idx: 1, delta: 2, matching: false, a (3): [0, 3, 4, 5], b (0): [0, 2, 5, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 4], b (3): [0, 3, 4, 5]
+idx: 2, delta: 2, matching: false, a (4): [1, 4, 5], b (1): [0, 2, 4, 6]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 3, 4, 5], b (0): [0, 2, 5, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 3, 4, 5], b (4): [1, 4, 5]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 3, 4, 5], b (2): [3, 4]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 3, 4, 5], b (1): [0, 2, 4, 6]
+idx: 3, delta: 4, matching: false, a (7): [1, 4, 5], b (0): [0, 2, 5, 6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 4, 5], b (5): [1, 2, 3, 4, 5]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 3, 4, 5], b (3): [0, 3, 4, 5]
+idx: 4, delta: 3, matching: false, a (7): [1, 4, 5], b (2): [3, 4]
+idx: 4, delta: 4, matching: false, a (8): [0, 3, 4, 5], b (1): [0, 2, 4, 6]
+idx: 4, delta: 5, matching: false, a (9): [3, 4], b (0): [0, 2, 5, 6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: true, a (5): [1, 2, 3, 4, 5], b (6): [1, 2, 3, 4, 5]
+idx: 5, delta: 2, matching: true, a (7): [1, 4, 5], b (4): [1, 4, 5]
+idx: 5, delta: 3, matching: true, a (8): [0, 3, 4, 5], b (3): [0, 3, 4, 5]
+idx: 5, delta: 4, matching: true, a (9): [3, 4], b (2): [3, 4]
+idx: 5, delta: 5, matching: true, a (10): [0, 2, 4, 6], b (1): [0, 2, 4, 6]
+idx: 5, delta: 6, matching: false, a (11): [0, 2, 3, 5, 6], b (0): [0, 2, 5, 6]
+idx: 5, delta: 6 --- found smudge!
+idx: 5 --- EXITING WITH true
+#.#..##
+#.#.#.#
+...##..
+#..###.
+.#..##.
+.#####.
+.#####.
+.#..##.
+#..###.
+...##..
+#.#.#.#
+#.##.##
+#.##.##
+600 (vert: 0, horiz: 6)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 3, 9, 14], b (1): [3, 4, 6, 7, 8, 10, 11, 12, 13]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: true, a (1): [3, 4, 6, 7, 8, 10, 11, 12, 13], b (2): [3, 4, 6, 7, 8, 10, 11, 12, 13]
+idx: 1, delta: 2, matching: true, a (3): [1, 2, 3, 9, 14], b (0): [1, 2, 3, 9, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 4, 6, 7, 8, 10, 11, 12, 13], b (3): [1, 2, 3, 9, 14]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 5, 7, 11, 12, 14], b (1): [3, 4, 6, 7, 8, 10, 11, 12, 13]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 3, 4, 6, 7, 12, 13, 14], b (0): [1, 2, 3, 9, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 3, 9, 14], b (4): [0, 1, 3, 5, 7, 11, 12, 14]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 3, 4, 6, 7, 12, 13, 14], b (2): [3, 4, 6, 7, 8, 10, 11, 12, 13]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 4, 5, 6, 7, 8, 9, 13], b (1): [3, 4, 6, 7, 8, 10, 11, 12, 13]
+idx: 3, delta: 4, matching: false, a (7): [1, 8, 10, 12], b (0): [1, 2, 3, 9, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3, 5, 7, 11, 12, 14], b (5): [0, 1, 2, 3, 4, 6, 7, 12, 13, 14]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 4, 5, 6, 7, 8, 9, 13], b (3): [1, 2, 3, 9, 14]
+idx: 4, delta: 3, matching: false, a (7): [1, 8, 10, 12], b (2): [3, 4, 6, 7, 8, 10, 11, 12, 13]
+idx: 4, delta: 4, matching: false, a (8): [1, 3, 4, 5, 6, 8, 13, 14], b (1): [3, 4, 6, 7, 8, 10, 11, 12, 13]
+idx: 4, delta: 5, matching: false, a (9): [1, 3, 4, 5, 6, 8, 13, 14], b (0): [1, 2, 3, 9, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 3, 4, 6, 7, 12, 13, 14], b (6): [0, 1, 2, 4, 5, 6, 7, 8, 9, 13]
+idx: 5, delta: 2, matching: false, a (7): [1, 8, 10, 12], b (4): [0, 1, 3, 5, 7, 11, 12, 14]
+idx: 5, delta: 3, matching: false, a (8): [1, 3, 4, 5, 6, 8, 13, 14], b (3): [1, 2, 3, 9, 14]
+idx: 5, delta: 4, matching: false, a (9): [1, 3, 4, 5, 6, 8, 13, 14], b (2): [3, 4, 6, 7, 8, 10, 11, 12, 13]
+idx: 5, delta: 5, matching: false, a (10): [1, 8, 10, 12], b (1): [3, 4, 6, 7, 8, 10, 11, 12, 13]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2, 4, 5, 6, 7, 8, 9, 13], b (0): [1, 2, 3, 9, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 4, 5, 6, 7, 8, 9, 13], b (7): [1, 8, 10, 12]
+idx: 6, delta: 2, matching: false, a (8): [1, 3, 4, 5, 6, 8, 13, 14], b (5): [0, 1, 2, 3, 4, 6, 7, 12, 13, 14]
+idx: 6, delta: 3, matching: false, a (9): [1, 3, 4, 5, 6, 8, 13, 14], b (4): [0, 1, 3, 5, 7, 11, 12, 14]
+idx: 6, delta: 4, matching: false, a (10): [1, 8, 10, 12], b (3): [1, 2, 3, 9, 14]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 2, 4, 5, 6, 7, 8, 9, 13], b (2): [3, 4, 6, 7, 8, 10, 11, 12, 13]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 2, 3, 4, 6, 7, 12, 13, 14], b (1): [3, 4, 6, 7, 8, 10, 11, 12, 13]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 3, 5, 7, 11, 12, 14], b (0): [1, 2, 3, 9, 14]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 8, 10, 12], b (8): [1, 3, 4, 5, 6, 8, 13, 14]
+idx: 7, delta: 2, matching: false, a (9): [1, 3, 4, 5, 6, 8, 13, 14], b (6): [0, 1, 2, 4, 5, 6, 7, 8, 9, 13]
+idx: 7, delta: 3, matching: false, a (10): [1, 8, 10, 12], b (5): [0, 1, 2, 3, 4, 6, 7, 12, 13, 14]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 2, 4, 5, 6, 7, 8, 9, 13], b (4): [0, 1, 3, 5, 7, 11, 12, 14]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 2, 3, 4, 6, 7, 12, 13, 14], b (3): [1, 2, 3, 9, 14]
+idx: 7, delta: 6, matching: false, a (13): [0, 1, 3, 5, 7, 11, 12, 14], b (2): [3, 4, 6, 7, 8, 10, 11, 12, 13]
+idx: 7, delta: 7, matching: false, a (14): [1, 2, 3, 7, 9, 14], b (1): [3, 4, 6, 7, 8, 10, 11, 12, 13]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: true, a (8): [1, 3, 4, 5, 6, 8, 13, 14], b (9): [1, 3, 4, 5, 6, 8, 13, 14]
+idx: 8, delta: 2, matching: true, a (10): [1, 8, 10, 12], b (7): [1, 8, 10, 12]
+idx: 8, delta: 3, matching: true, a (11): [0, 1, 2, 4, 5, 6, 7, 8, 9, 13], b (6): [0, 1, 2, 4, 5, 6, 7, 8, 9, 13]
+idx: 8, delta: 4, matching: true, a (12): [0, 1, 2, 3, 4, 6, 7, 12, 13, 14], b (5): [0, 1, 2, 3, 4, 6, 7, 12, 13, 14]
+idx: 8, delta: 5, matching: true, a (13): [0, 1, 3, 5, 7, 11, 12, 14], b (4): [0, 1, 3, 5, 7, 11, 12, 14]
+idx: 8, delta: 6, matching: false, a (14): [1, 2, 3, 7, 9, 14], b (3): [1, 2, 3, 9, 14]
+idx: 8, delta: 6 --- found smudge!
+idx: 8 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [4, 5, 6, 11, 12, 13], b (1): [0, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14], b (2): [0, 3, 5, 6, 11, 12, 14]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 4, 5, 8, 9, 12, 13, 14], b (0): [4, 5, 6, 11, 12, 13]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 5, 6, 11, 12, 14], b (3): [0, 1, 2, 3, 4, 5, 8, 9, 12, 13, 14]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 5, 6, 8, 9, 11, 12], b (1): [0, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 2, delta: 3, matching: false, a (5): [4, 6, 8, 9, 11, 13], b (0): [4, 5, 6, 11, 12, 13]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 3, 4, 5, 8, 9, 12, 13, 14], b (4): [1, 2, 5, 6, 8, 9, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [4, 6, 8, 9, 11, 13], b (2): [0, 3, 5, 6, 11, 12, 14]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 5, 6, 8, 9, 11, 12], b (1): [0, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 4, 5, 6, 11, 12, 13, 14], b (0): [4, 5, 6, 11, 12, 13]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 5, 6, 8, 9, 11, 12], b (5): [4, 6, 8, 9, 11, 13]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 5, 6, 8, 9, 11, 12], b (3): [0, 1, 2, 3, 4, 5, 8, 9, 12, 13, 14]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 4, 5, 6, 11, 12, 13, 14], b (2): [0, 3, 5, 6, 11, 12, 14]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 6, 7, 8, 9, 10, 11], b (1): [0, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 4, delta: 5, matching: false, a (9): [0, 3, 6, 11, 14], b (0): [4, 5, 6, 11, 12, 13]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [4, 6, 8, 9, 11, 13], b (6): [1, 2, 5, 6, 8, 9, 11, 12]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 4, 5, 6, 11, 12, 13, 14], b (4): [1, 2, 5, 6, 8, 9, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [1, 2, 6, 7, 8, 9, 10, 11], b (3): [0, 1, 2, 3, 4, 5, 8, 9, 12, 13, 14]
+idx: 5, delta: 4, matching: false, a (9): [0, 3, 6, 11, 14], b (2): [0, 3, 5, 6, 11, 12, 14]
+idx: 5, delta: 5, matching: false, a (10): [1, 2, 7, 10], b (1): [0, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 5, delta: 6, matching: false, a (11): [1, 2, 4, 13], b (0): [4, 5, 6, 11, 12, 13]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 5, 6, 8, 9, 11, 12], b (7): [1, 2, 4, 5, 6, 11, 12, 13, 14]
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 6, 7, 8, 9, 10, 11], b (5): [4, 6, 8, 9, 11, 13]
+idx: 6, delta: 3, matching: false, a (9): [0, 3, 6, 11, 14], b (4): [1, 2, 5, 6, 8, 9, 11, 12]
+idx: 6, delta: 4, matching: false, a (10): [1, 2, 7, 10], b (3): [0, 1, 2, 3, 4, 5, 8, 9, 12, 13, 14]
+idx: 6, delta: 5, matching: false, a (11): [1, 2, 4, 13], b (2): [0, 3, 5, 6, 11, 12, 14]
+idx: 6, delta: 6, matching: false, a (12): [1, 2, 4, 5, 7, 10, 12, 13], b (1): [0, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 6, delta: 7, matching: false, a (13): [1, 2, 5, 6, 8, 9, 11, 12], b (0): [4, 5, 6, 11, 12, 13]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 4, 5, 6, 11, 12, 13, 14], b (8): [1, 2, 6, 7, 8, 9, 10, 11]
+idx: 7, delta: 2, matching: false, a (9): [0, 3, 6, 11, 14], b (6): [1, 2, 5, 6, 8, 9, 11, 12]
+idx: 7, delta: 3, matching: false, a (10): [1, 2, 7, 10], b (5): [4, 6, 8, 9, 11, 13]
+idx: 7, delta: 4, matching: false, a (11): [1, 2, 4, 13], b (4): [1, 2, 5, 6, 8, 9, 11, 12]
+idx: 7, delta: 5, matching: false, a (12): [1, 2, 4, 5, 7, 10, 12, 13], b (3): [0, 1, 2, 3, 4, 5, 8, 9, 12, 13, 14]
+idx: 7, delta: 6, matching: false, a (13): [1, 2, 5, 6, 8, 9, 11, 12], b (2): [0, 3, 5, 6, 11, 12, 14]
+idx: 7, delta: 7, matching: false, a (14): [0, 3, 4, 5, 8, 9, 12, 13, 14], b (1): [0, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [1, 2, 6, 7, 8, 9, 10, 11], b (9): [0, 3, 6, 11, 14]
+idx: 8, delta: 2, matching: false, a (10): [1, 2, 7, 10], b (7): [1, 2, 4, 5, 6, 11, 12, 13, 14]
+idx: 8, delta: 3, matching: false, a (11): [1, 2, 4, 13], b (6): [1, 2, 5, 6, 8, 9, 11, 12]
+idx: 8, delta: 4, matching: false, a (12): [1, 2, 4, 5, 7, 10, 12, 13], b (5): [4, 6, 8, 9, 11, 13]
+idx: 8, delta: 5, matching: true, a (13): [1, 2, 5, 6, 8, 9, 11, 12], b (4): [1, 2, 5, 6, 8, 9, 11, 12]
+idx: 8, delta: 6, matching: false, a (14): [0, 3, 4, 5, 8, 9, 12, 13, 14], b (3): [0, 1, 2, 3, 4, 5, 8, 9, 12, 13, 14]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 3, 6, 11, 14], b (10): [1, 2, 7, 10]
+idx: 9, delta: 2, matching: false, a (11): [1, 2, 4, 13], b (8): [1, 2, 6, 7, 8, 9, 10, 11]
+idx: 9, delta: 3, matching: false, a (12): [1, 2, 4, 5, 7, 10, 12, 13], b (7): [1, 2, 4, 5, 6, 11, 12, 13, 14]
+idx: 9, delta: 4, matching: true, a (13): [1, 2, 5, 6, 8, 9, 11, 12], b (6): [1, 2, 5, 6, 8, 9, 11, 12]
+idx: 9, delta: 5, matching: false, a (14): [0, 3, 4, 5, 8, 9, 12, 13, 14], b (5): [4, 6, 8, 9, 11, 13]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [1, 2, 7, 10], b (11): [1, 2, 4, 13]
+idx: 10, delta: 2, matching: false, a (12): [1, 2, 4, 5, 7, 10, 12, 13], b (9): [0, 3, 6, 11, 14]
+idx: 10, delta: 3, matching: false, a (13): [1, 2, 5, 6, 8, 9, 11, 12], b (8): [1, 2, 6, 7, 8, 9, 10, 11]
+idx: 10, delta: 4, matching: false, a (14): [0, 3, 4, 5, 8, 9, 12, 13, 14], b (7): [1, 2, 4, 5, 6, 11, 12, 13, 14]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [1, 2, 4, 13], b (12): [1, 2, 4, 5, 7, 10, 12, 13]
+idx: 11, delta: 2, matching: false, a (13): [1, 2, 5, 6, 8, 9, 11, 12], b (10): [1, 2, 7, 10]
+idx: 11, delta: 3, matching: false, a (14): [0, 3, 4, 5, 8, 9, 12, 13, 14], b (9): [0, 3, 6, 11, 14]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [1, 2, 4, 5, 7, 10, 12, 13], b (13): [1, 2, 5, 6, 8, 9, 11, 12]
+idx: 12, delta: 2, matching: false, a (14): [0, 3, 4, 5, 8, 9, 12, 13, 14], b (11): [1, 2, 4, 13]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [1, 2, 5, 6, 8, 9, 11, 12], b (14): [0, 3, 4, 5, 8, 9, 12, 13, 14]
+idx: 13 --- EXITING WITH false
+idx: 14 --- EXITING WITH false
+....###....###.
+#..############
+#..#.##....##.#
+######..##..###
+.##..##.##.##..
+....#.#.##.#.#.
+.##..##.##.##..
+.##.###....####
+.##...######...
+#..#..#....#..#
+.##....#..#....
+.##.#........#.
+.##.##.#..#.##.
+.##..##.##.##..
+#..###..##..###
+9 (vert: 9, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 4, 5, 6, 8, 9, 11, 12], b (1): [0, 1, 2, 4, 6, 8, 9, 11]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 4, 6, 8, 9, 11], b (2): [0, 4, 5, 12]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 4, 5, 7, 10, 12], b (0): [0, 1, 4, 5, 6, 8, 9, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 4, 5, 12], b (3): [0, 2, 4, 5, 7, 10, 12]
+idx: 2, delta: 2, matching: false, a (4): [0, 2, 4, 5, 7, 10, 12], b (1): [0, 1, 2, 4, 6, 8, 9, 11]
+idx: 2, delta: 3, matching: false, a (5): [0, 4, 5, 12], b (0): [0, 1, 4, 5, 6, 8, 9, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [0, 2, 4, 5, 7, 10, 12], b (4): [0, 2, 4, 5, 7, 10, 12]
+idx: 3, delta: 2, matching: true, a (5): [0, 4, 5, 12], b (2): [0, 4, 5, 12]
+idx: 3, delta: 3, matching: true, a (6): [0, 1, 2, 4, 6, 8, 9, 11], b (1): [0, 1, 2, 4, 6, 8, 9, 11]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 5, 6, 8, 9, 11, 12], b (0): [0, 1, 4, 5, 6, 8, 9, 11, 12]
+idx: 3, delta: 4 --- found smudge!
+idx: 3 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 3, 4, 5, 6, 7, 9, 10, 13], b (1): [0, 1, 6, 7, 12, 13]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 6, 7, 12, 13], b (2): [1, 3, 4, 6, 9, 10, 13, 14]
+idx: 1, delta: 2, matching: false, a (3): [11, 14], b (0): [0, 1, 2, 3, 4, 5, 6, 7, 9, 10, 13]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 3, 4, 6, 9, 10, 13, 14], b (3): [11, 14]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 3, 4, 5, 6, 8, 10, 11, 12], b (1): [0, 1, 6, 7, 12, 13]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 4, 5, 7, 8, 9, 14], b (0): [0, 1, 2, 3, 4, 5, 6, 7, 9, 10, 13]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [11, 14], b (4): [0, 1, 2, 3, 4, 5, 6, 8, 10, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 4, 5, 7, 8, 9, 14], b (2): [1, 3, 4, 6, 9, 10, 13, 14]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 6, 7, 8, 13, 14], b (1): [0, 1, 6, 7, 12, 13]
+idx: 3, delta: 4, matching: false, a (7): [3, 4, 9, 11], b (0): [0, 1, 2, 3, 4, 5, 6, 7, 9, 10, 13]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 3, 4, 5, 6, 8, 10, 11, 12], b (5): [0, 2, 3, 4, 5, 7, 8, 9, 14]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 6, 7, 8, 13, 14], b (3): [11, 14]
+idx: 4, delta: 3, matching: false, a (7): [3, 4, 9, 11], b (2): [1, 3, 4, 6, 9, 10, 13, 14]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 6, 7, 9, 10, 11, 12, 13, 14], b (1): [0, 1, 6, 7, 12, 13]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 6, 7, 9, 10, 11, 12, 13, 14], b (0): [0, 1, 2, 3, 4, 5, 6, 7, 9, 10, 13]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 3, 4, 5, 7, 8, 9, 14], b (6): [0, 1, 6, 7, 8, 13, 14]
+idx: 5, delta: 2, matching: false, a (7): [3, 4, 9, 11], b (4): [0, 1, 2, 3, 4, 5, 6, 8, 10, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 6, 7, 9, 10, 11, 12, 13, 14], b (3): [11, 14]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 6, 7, 9, 10, 11, 12, 13, 14], b (2): [1, 3, 4, 6, 9, 10, 13, 14]
+idx: 5, delta: 5, matching: false, a (10): [3, 4, 9, 11], b (1): [0, 1, 6, 7, 12, 13]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 6, 7, 8, 13, 14], b (0): [0, 1, 2, 3, 4, 5, 6, 7, 9, 10, 13]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 6, 7, 8, 13, 14], b (7): [3, 4, 9, 11]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 6, 7, 9, 10, 11, 12, 13, 14], b (5): [0, 2, 3, 4, 5, 7, 8, 9, 14]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 6, 7, 9, 10, 11, 12, 13, 14], b (4): [0, 1, 2, 3, 4, 5, 6, 8, 10, 11, 12]
+idx: 6, delta: 4, matching: false, a (10): [3, 4, 9, 11], b (3): [11, 14]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 6, 7, 8, 13, 14], b (2): [1, 3, 4, 6, 9, 10, 13, 14]
+idx: 6, delta: 6, matching: false, a (12): [0, 2, 3, 4, 5, 7, 8, 9, 14], b (1): [0, 1, 6, 7, 12, 13]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [3, 4, 9, 11], b (8): [0, 1, 6, 7, 9, 10, 11, 12, 13, 14]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 6, 7, 9, 10, 11, 12, 13, 14], b (6): [0, 1, 6, 7, 8, 13, 14]
+idx: 7, delta: 3, matching: false, a (10): [3, 4, 9, 11], b (5): [0, 2, 3, 4, 5, 7, 8, 9, 14]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 6, 7, 8, 13, 14], b (4): [0, 1, 2, 3, 4, 5, 6, 8, 10, 11, 12]
+idx: 7, delta: 5, matching: false, a (12): [0, 2, 3, 4, 5, 7, 8, 9, 14], b (3): [11, 14]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: true, a (8): [0, 1, 6, 7, 9, 10, 11, 12, 13, 14], b (9): [0, 1, 6, 7, 9, 10, 11, 12, 13, 14]
+idx: 8, delta: 2, matching: true, a (10): [3, 4, 9, 11], b (7): [3, 4, 9, 11]
+idx: 8, delta: 3, matching: true, a (11): [0, 1, 6, 7, 8, 13, 14], b (6): [0, 1, 6, 7, 8, 13, 14]
+idx: 8, delta: 4, matching: true, a (12): [0, 2, 3, 4, 5, 7, 8, 9, 14], b (5): [0, 2, 3, 4, 5, 7, 8, 9, 14]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 6, 7, 9, 10, 11, 12, 13, 14], b (10): [3, 4, 9, 11]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 6, 7, 8, 13, 14], b (8): [0, 1, 6, 7, 9, 10, 11, 12, 13, 14]
+idx: 9, delta: 3, matching: false, a (12): [0, 2, 3, 4, 5, 7, 8, 9, 14], b (7): [3, 4, 9, 11]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [3, 4, 9, 11], b (11): [0, 1, 6, 7, 8, 13, 14]
+idx: 10, delta: 2, matching: false, a (12): [0, 2, 3, 4, 5, 7, 8, 9, 14], b (9): [0, 1, 6, 7, 9, 10, 11, 12, 13, 14]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 6, 7, 8, 13, 14], b (12): [0, 2, 3, 4, 5, 7, 8, 9, 14]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+########.##..#.
+##....##....##.
+.#.##.#..##..##
+...........#..#
+#######.#.###..
+#.####.###....#
+##....###....##
+...##....#.#...
+##....##.######
+##....##.######
+...##....#.#...
+##....###....##
+#.####.###....#
+4 (vert: 4, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 4, 5, 7, 9, 10], b (1): [4, 7, 8]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [4, 7, 8], b (2): [0, 1, 2, 3, 4, 5, 6]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 4, 5, 6, 9, 10], b (0): [0, 1, 3, 4, 5, 7, 9, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 4, 5, 6], b (3): [0, 1, 2, 3, 4, 5, 6, 9, 10]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 4], b (1): [4, 7, 8]
+idx: 2, delta: 3, matching: false, a (5): [2, 3, 5, 6, 7, 10], b (0): [0, 1, 3, 4, 5, 7, 9, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 3, 4, 5, 6, 9, 10], b (4): [0, 1, 3, 4]
+idx: 3, delta: 2, matching: false, a (5): [2, 3, 5, 6, 7, 10], b (2): [0, 1, 2, 3, 4, 5, 6]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 5, 7, 8], b (1): [4, 7, 8]
+idx: 3, delta: 4, matching: false, a (7): [2, 3, 7, 9, 10], b (0): [0, 1, 3, 4, 5, 7, 9, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3, 4], b (5): [2, 3, 5, 6, 7, 10]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 5, 7, 8], b (3): [0, 1, 2, 3, 4, 5, 6, 9, 10]
+idx: 4, delta: 3, matching: false, a (7): [2, 3, 7, 9, 10], b (2): [0, 1, 2, 3, 4, 5, 6]
+idx: 4, delta: 4, matching: false, a (8): [2, 4, 8, 9, 10], b (1): [4, 7, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 3, 5, 6, 7, 10], b (6): [0, 1, 5, 7, 8]
+idx: 5, delta: 2, matching: false, a (7): [2, 3, 7, 9, 10], b (4): [0, 1, 3, 4]
+idx: 5, delta: 3, matching: false, a (8): [2, 4, 8, 9, 10], b (3): [0, 1, 2, 3, 4, 5, 6, 9, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 5, 7, 8], b (7): [2, 3, 7, 9, 10]
+idx: 6, delta: 2, matching: false, a (8): [2, 4, 8, 9, 10], b (5): [2, 3, 5, 6, 7, 10]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [2, 3, 7, 9, 10], b (8): [2, 4, 8, 9, 10]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+idx: 0, delta: 0, matching: true, a (0): [0, 2, 3, 4, 6], b (1): [0, 2, 3, 4, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 3, 4, 6], b (2): [2, 3, 5, 7, 8]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 3, 4, 5, 7], b (0): [0, 2, 3, 4, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 3, 5, 7, 8], b (3): [0, 2, 3, 4, 5, 7]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 3, 4, 8], b (1): [0, 2, 3, 4, 6]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 5, 6], b (0): [0, 2, 3, 4, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 3, 4, 5, 7], b (4): [0, 1, 2, 3, 4, 8]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 5, 6], b (2): [2, 3, 5, 7, 8]
+idx: 3, delta: 3, matching: false, a (6): [2, 3, 5], b (1): [0, 2, 3, 4, 6]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 5, 6, 7], b (0): [0, 2, 3, 4, 6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 3, 4, 8], b (5): [0, 2, 3, 5, 6]
+idx: 4, delta: 2, matching: false, a (6): [2, 3, 5], b (3): [0, 2, 3, 4, 5, 7]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 5, 6, 7], b (2): [2, 3, 5, 7, 8]
+idx: 4, delta: 4, matching: false, a (8): [1, 6, 8], b (1): [0, 2, 3, 4, 6]
+idx: 4, delta: 5, matching: false, a (9): [0, 3, 7, 8], b (0): [0, 2, 3, 4, 6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 3, 5, 6], b (6): [2, 3, 5]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 5, 6, 7], b (4): [0, 1, 2, 3, 4, 8]
+idx: 5, delta: 3, matching: false, a (8): [1, 6, 8], b (3): [0, 2, 3, 4, 5, 7]
+idx: 5, delta: 4, matching: false, a (9): [0, 3, 7, 8], b (2): [2, 3, 5, 7, 8]
+idx: 5, delta: 5, matching: false, a (10): [0, 3, 5, 7, 8], b (1): [0, 2, 3, 4, 6]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [2, 3, 5], b (7): [0, 1, 5, 6, 7]
+idx: 6, delta: 2, matching: false, a (8): [1, 6, 8], b (5): [0, 2, 3, 5, 6]
+idx: 6, delta: 3, matching: false, a (9): [0, 3, 7, 8], b (4): [0, 1, 2, 3, 4, 8]
+idx: 6, delta: 4, matching: false, a (10): [0, 3, 5, 7, 8], b (3): [0, 2, 3, 4, 5, 7]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 5, 6, 7], b (8): [1, 6, 8]
+idx: 7, delta: 2, matching: false, a (9): [0, 3, 7, 8], b (6): [2, 3, 5]
+idx: 7, delta: 3, matching: false, a (10): [0, 3, 5, 7, 8], b (5): [0, 2, 3, 5, 6]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [1, 6, 8], b (9): [0, 3, 7, 8]
+idx: 8, delta: 2, matching: false, a (10): [0, 3, 5, 7, 8], b (7): [0, 1, 5, 6, 7]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 3, 7, 8], b (10): [0, 3, 5, 7, 8]
+idx: 9, delta: 0 --- found smudge!
+idx: 9 --- EXITING WITH true
+#.###.#..
+#.###.#..
+..##.#.##
+#.####.#.
+#####...#
+#.##.##..
+..##.#...
+##...###.
+.#....#.#
+#..#...##
+#..#.#.##
+1000 (vert: 0, horiz: 10)
+
+idx: 0, delta: 0, matching: false, a (0): [2, 3], b (1): [0, 2, 3, 5, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 3, 5, 6], b (2): [0, 2, 3, 5]
+idx: 1, delta: 0 --- found smudge!
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 4, 5], b (0): [2, 3]
+idx: 1, delta: 2 --- found smudge twice!
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 3, 5], b (3): [0, 1, 4, 5]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 4, 5], b (1): [0, 2, 3, 5, 6]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 5], b (0): [2, 3]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [0, 1, 4, 5], b (4): [0, 1, 4, 5]
+idx: 3, delta: 2, matching: true, a (5): [0, 2, 3, 5], b (2): [0, 2, 3, 5]
+idx: 3, delta: 3, matching: true, a (6): [0, 2, 3, 5, 6], b (1): [0, 2, 3, 5, 6]
+idx: 3, delta: 4, matching: false, a (7): [0, 2, 3, 5], b (0): [2, 3]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 4, 5], b (5): [0, 2, 3, 5]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 3, 5, 6], b (3): [0, 1, 4, 5]
+idx: 4, delta: 3, matching: true, a (7): [0, 2, 3, 5], b (2): [0, 2, 3, 5]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 3, 4, 6], b (1): [0, 2, 3, 5, 6]
+idx: 4, delta: 5, matching: false, a (9): [1, 2, 3, 4, 6], b (0): [2, 3]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 3, 5], b (6): [0, 2, 3, 5, 6]
+idx: 5, delta: 0 --- found smudge!
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 3, 5], b (4): [0, 1, 4, 5]
+idx: 5, delta: 2 --- found smudge twice!
+idx: 6, delta: 0, matching: false, a (6): [0, 2, 3, 5, 6], b (7): [0, 2, 3, 5]
+idx: 6, delta: 0 --- found smudge!
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 3, 4, 6], b (5): [0, 2, 3, 5]
+idx: 6, delta: 2 --- found smudge twice!
+idx: 7, delta: 0, matching: false, a (7): [0, 2, 3, 5], b (8): [1, 2, 3, 4, 6]
+idx: 7, delta: 2, matching: false, a (9): [1, 2, 3, 4, 6], b (6): [0, 2, 3, 5, 6]
+idx: 7, delta: 3, matching: false, a (10): [0, 5], b (5): [0, 2, 3, 5]
+idx: 7, delta: 4, matching: false, a (11): [0, 5, 6], b (4): [0, 1, 4, 5]
+idx: 7, delta: 5, matching: false, a (12): [0, 5], b (3): [0, 1, 4, 5]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: true, a (8): [1, 2, 3, 4, 6], b (9): [1, 2, 3, 4, 6]
+idx: 8, delta: 2, matching: false, a (10): [0, 5], b (7): [0, 2, 3, 5]
+idx: 8, delta: 3, matching: false, a (11): [0, 5, 6], b (6): [0, 2, 3, 5, 6]
+idx: 8, delta: 4, matching: false, a (12): [0, 5], b (5): [0, 2, 3, 5]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 2, 3, 4, 6], b (10): [0, 5]
+idx: 9, delta: 2, matching: false, a (11): [0, 5, 6], b (8): [1, 2, 3, 4, 6]
+idx: 9, delta: 3, matching: false, a (12): [0, 5], b (7): [0, 2, 3, 5]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 5], b (11): [0, 5, 6]
+idx: 10, delta: 0 --- found smudge!
+idx: 10, delta: 2, matching: false, a (12): [0, 5], b (9): [1, 2, 3, 4, 6]
+idx: 10, delta: 2 --- found smudge twice!
+idx: 11, delta: 0, matching: false, a (11): [0, 5, 6], b (12): [0, 5]
+idx: 11, delta: 0 --- found smudge!
+idx: 11 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 3, 4, 5, 6, 7, 10, 11, 12], b (1): [3, 4, 8, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [3, 4, 8, 9], b (2): [0, 1, 2, 5, 6, 7, 8, 9]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 5, 6, 7, 8, 9], b (0): [1, 2, 3, 4, 5, 6, 7, 10, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: true, a (2): [0, 1, 2, 5, 6, 7, 8, 9], b (3): [0, 1, 2, 5, 6, 7, 8, 9]
+idx: 2, delta: 2, matching: true, a (4): [3, 4, 8, 9], b (1): [3, 4, 8, 9]
+idx: 2, delta: 3, matching: true, a (5): [1, 2, 3, 4, 5, 6, 7, 10, 11, 12], b (0): [1, 2, 3, 4, 5, 6, 7, 10, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 5, 6, 7, 8, 9], b (4): [3, 4, 8, 9]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 3, 4, 5, 6, 7, 10, 11, 12], b (2): [0, 1, 2, 5, 6, 7, 8, 9]
+idx: 3, delta: 3, matching: false, a (6): [1, 6, 8, 9, 11], b (1): [3, 4, 8, 9]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [3, 4, 8, 9], b (5): [1, 2, 3, 4, 5, 6, 7, 10, 11, 12]
+idx: 4, delta: 2, matching: false, a (6): [1, 6, 8, 9, 11], b (3): [0, 1, 2, 5, 6, 7, 8, 9]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 3, 4, 5, 6, 7, 10, 11, 12], b (6): [1, 6, 8, 9, 11]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+.#######..###
+...##...##...
+###..#####...
+###..#####...
+...##...##...
+.#######..###
+.#....#.##.#.
+12 (vert: 12, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [5, 7, 9, 10, 11, 12], b (1): [0, 3, 9, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 3, 9, 10], b (2): [0, 2, 5, 7, 9]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 5, 6, 9, 10, 11, 12], b (0): [5, 7, 9, 10, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 5, 7, 9], b (3): [0, 1, 5, 6, 9, 10, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [2, 8, 9], b (1): [0, 3, 9, 10]
+idx: 2, delta: 3, matching: false, a (5): [0, 3, 4, 5, 6, 7, 8, 9], b (0): [5, 7, 9, 10, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 5, 6, 9, 10, 11, 12], b (4): [2, 8, 9]
+idx: 3, delta: 2, matching: false, a (5): [0, 3, 4, 5, 6, 7, 8, 9], b (2): [0, 2, 5, 7, 9]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 5, 6, 9, 10, 11, 12], b (1): [0, 3, 9, 10]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 6, 7, 10], b (0): [5, 7, 9, 10, 11, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 8, 9], b (5): [0, 3, 4, 5, 6, 7, 8, 9]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 5, 6, 9, 10, 11, 12], b (3): [0, 1, 5, 6, 9, 10, 11, 12]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 6, 7, 10], b (2): [0, 2, 5, 7, 9]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 6, 7, 10], b (1): [0, 3, 9, 10]
+idx: 4, delta: 5, matching: false, a (9): [0, 2, 3, 5, 6, 9, 10, 11, 12], b (0): [5, 7, 9, 10, 11, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 3, 4, 5, 6, 7, 8, 9], b (6): [0, 2, 5, 6, 9, 10, 11, 12]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 6, 7, 10], b (4): [2, 8, 9]
+idx: 5, delta: 3, matching: false, a (8): [1, 2, 6, 7, 10], b (3): [0, 1, 5, 6, 9, 10, 11, 12]
+idx: 5, delta: 4, matching: false, a (9): [0, 2, 3, 5, 6, 9, 10, 11, 12], b (2): [0, 2, 5, 7, 9]
+idx: 5, delta: 5, matching: false, a (10): [0, 3, 4, 5, 6, 7, 8, 9], b (1): [0, 3, 9, 10]
+idx: 5, delta: 6, matching: false, a (11): [2, 8, 9], b (0): [5, 7, 9, 10, 11, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 2, 5, 6, 9, 10, 11, 12], b (7): [1, 2, 6, 7, 10]
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 6, 7, 10], b (5): [0, 3, 4, 5, 6, 7, 8, 9]
+idx: 6, delta: 3, matching: false, a (9): [0, 2, 3, 5, 6, 9, 10, 11, 12], b (4): [2, 8, 9]
+idx: 6, delta: 4, matching: false, a (10): [0, 3, 4, 5, 6, 7, 8, 9], b (3): [0, 1, 5, 6, 9, 10, 11, 12]
+idx: 6, delta: 5, matching: false, a (11): [2, 8, 9], b (2): [0, 2, 5, 7, 9]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 5, 6, 9, 10, 11, 12], b (1): [0, 3, 9, 10]
+idx: 6, delta: 7, matching: false, a (13): [0, 2, 5, 7, 9], b (0): [5, 7, 9, 10, 11, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: true, a (7): [1, 2, 6, 7, 10], b (8): [1, 2, 6, 7, 10]
+idx: 7, delta: 2, matching: false, a (9): [0, 2, 3, 5, 6, 9, 10, 11, 12], b (6): [0, 2, 5, 6, 9, 10, 11, 12]
+idx: 7, delta: 2 --- found smudge!
+idx: 7, delta: 3, matching: true, a (10): [0, 3, 4, 5, 6, 7, 8, 9], b (5): [0, 3, 4, 5, 6, 7, 8, 9]
+idx: 7, delta: 4, matching: true, a (11): [2, 8, 9], b (4): [2, 8, 9]
+idx: 7, delta: 5, matching: true, a (12): [0, 1, 5, 6, 9, 10, 11, 12], b (3): [0, 1, 5, 6, 9, 10, 11, 12]
+idx: 7, delta: 6, matching: true, a (13): [0, 2, 5, 7, 9], b (2): [0, 2, 5, 7, 9]
+idx: 7, delta: 7, matching: true, a (14): [0, 3, 9, 10], b (1): [0, 3, 9, 10]
+idx: 7, delta: 8, matching: true, a (15): [5, 7, 9, 10, 11, 12], b (0): [5, 7, 9, 10, 11, 12]
+idx: 7 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 3, 5, 6, 9, 10, 12, 13, 14], b (1): [3, 7, 8, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [3, 7, 8, 12], b (2): [2, 4, 6, 7, 8, 9, 11, 13]
+idx: 1, delta: 2, matching: false, a (3): [1, 5, 9, 10, 14, 16], b (0): [1, 2, 3, 5, 6, 9, 10, 12, 13, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 4, 6, 7, 8, 9, 11, 13], b (3): [1, 5, 9, 10, 14, 16]
+idx: 2, delta: 2, matching: false, a (4): [5, 10, 16], b (1): [3, 7, 8, 12]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 5, 6, 9, 10, 12, 13, 15], b (0): [1, 2, 3, 5, 6, 9, 10, 12, 13, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 5, 9, 10, 14, 16], b (4): [5, 10, 16]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 5, 6, 9, 10, 12, 13, 15], b (2): [2, 4, 6, 7, 8, 9, 11, 13]
+idx: 3, delta: 3, matching: false, a (6): [3, 5, 6, 7, 8, 9, 10, 12, 16], b (1): [3, 7, 8, 12]
+idx: 3, delta: 4, matching: false, a (7): [0, 2, 5, 7, 8, 10, 13, 15], b (0): [1, 2, 3, 5, 6, 9, 10, 12, 13, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [5, 10, 16], b (5): [0, 2, 3, 5, 6, 9, 10, 12, 13, 15]
+idx: 4, delta: 2, matching: false, a (6): [3, 5, 6, 7, 8, 9, 10, 12, 16], b (3): [1, 5, 9, 10, 14, 16]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 5, 7, 8, 10, 13, 15], b (2): [2, 4, 6, 7, 8, 9, 11, 13]
+idx: 4, delta: 4, matching: false, a (8): [4, 5, 10, 11, 16], b (1): [3, 7, 8, 12]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16], b (0): [1, 2, 3, 5, 6, 9, 10, 12, 13, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 3, 5, 6, 9, 10, 12, 13, 15], b (6): [3, 5, 6, 7, 8, 9, 10, 12, 16]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 5, 7, 8, 10, 13, 15], b (4): [5, 10, 16]
+idx: 5, delta: 3, matching: false, a (8): [4, 5, 10, 11, 16], b (3): [1, 5, 9, 10, 14, 16]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16], b (2): [2, 4, 6, 7, 8, 9, 11, 13]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 3, 6, 7, 8, 9, 12, 14, 15], b (1): [3, 7, 8, 12]
+idx: 5, delta: 6, matching: false, a (11): [0, 3, 6, 9, 12, 15, 16], b (0): [1, 2, 3, 5, 6, 9, 10, 12, 13, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [3, 5, 6, 7, 8, 9, 10, 12, 16], b (7): [0, 2, 5, 7, 8, 10, 13, 15]
+idx: 6, delta: 2, matching: false, a (8): [4, 5, 10, 11, 16], b (5): [0, 2, 3, 5, 6, 9, 10, 12, 13, 15]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16], b (4): [5, 10, 16]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 3, 6, 7, 8, 9, 12, 14, 15], b (3): [1, 5, 9, 10, 14, 16]
+idx: 6, delta: 5, matching: false, a (11): [0, 3, 6, 9, 12, 15, 16], b (2): [2, 4, 6, 7, 8, 9, 11, 13]
+idx: 6, delta: 6, matching: false, a (12): [0, 3, 6, 9, 12, 15, 16], b (1): [3, 7, 8, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 2, 5, 7, 8, 10, 13, 15], b (8): [4, 5, 10, 11, 16]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16], b (6): [3, 5, 6, 7, 8, 9, 10, 12, 16]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 3, 6, 7, 8, 9, 12, 14, 15], b (5): [0, 2, 3, 5, 6, 9, 10, 12, 13, 15]
+idx: 7, delta: 4, matching: false, a (11): [0, 3, 6, 9, 12, 15, 16], b (4): [5, 10, 16]
+idx: 7, delta: 5, matching: false, a (12): [0, 3, 6, 9, 12, 15, 16], b (3): [1, 5, 9, 10, 14, 16]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [4, 5, 10, 11, 16], b (9): [0, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 3, 6, 7, 8, 9, 12, 14, 15], b (7): [0, 2, 5, 7, 8, 10, 13, 15]
+idx: 8, delta: 3, matching: false, a (11): [0, 3, 6, 9, 12, 15, 16], b (6): [3, 5, 6, 7, 8, 9, 10, 12, 16]
+idx: 8, delta: 4, matching: false, a (12): [0, 3, 6, 9, 12, 15, 16], b (5): [0, 2, 3, 5, 6, 9, 10, 12, 13, 15]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16], b (10): [0, 1, 3, 6, 7, 8, 9, 12, 14, 15]
+idx: 9, delta: 2, matching: false, a (11): [0, 3, 6, 9, 12, 15, 16], b (8): [4, 5, 10, 11, 16]
+idx: 9, delta: 3, matching: false, a (12): [0, 3, 6, 9, 12, 15, 16], b (7): [0, 2, 5, 7, 8, 10, 13, 15]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 3, 6, 7, 8, 9, 12, 14, 15], b (11): [0, 3, 6, 9, 12, 15, 16]
+idx: 10, delta: 2, matching: false, a (12): [0, 3, 6, 9, 12, 15, 16], b (9): [0, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: true, a (11): [0, 3, 6, 9, 12, 15, 16], b (12): [0, 3, 6, 9, 12, 15, 16]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+.###.##..##.###..
+...#...##...#....
+..#.#.####.#.#...
+.#...#...##...#.#
+.....#....#.....#
+#.##.##..##.##.#.
+...#.######.#...#
+#.#..#.##.#..#.#.
+....##....##....#
+#######..########
+##.#..####..#.##.
+#..#..#..#..#..##
+#..#..#..#..#..##
+8 (vert: 8, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [4, 5, 6, 7, 10, 11, 12], b (1): [0, 2, 3, 4, 7, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 3, 4, 7, 10], b (2): [3, 4, 5, 6, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 3, 6, 7, 8, 9, 10, 11], b (0): [4, 5, 6, 7, 10, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 4, 5, 6, 11, 12], b (3): [0, 2, 3, 6, 7, 8, 9, 10, 11]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3], b (1): [0, 2, 3, 4, 7, 10]
+idx: 2, delta: 3, matching: false, a (5): [2, 5, 6, 8, 9, 11, 12], b (0): [4, 5, 6, 7, 10, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 3, 6, 7, 8, 9, 10, 11], b (4): [0, 1, 3]
+idx: 3, delta: 2, matching: false, a (5): [2, 5, 6, 8, 9, 11, 12], b (2): [3, 4, 5, 6, 11, 12]
+idx: 3, delta: 3, matching: false, a (6): [2, 5, 6, 8, 9, 11, 12], b (1): [0, 2, 3, 4, 7, 10]
+idx: 3, delta: 4, matching: false, a (7): [2, 5, 6, 8, 9, 11, 12], b (0): [4, 5, 6, 7, 10, 11, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3], b (5): [2, 5, 6, 8, 9, 11, 12]
+idx: 4, delta: 2, matching: false, a (6): [2, 5, 6, 8, 9, 11, 12], b (3): [0, 2, 3, 6, 7, 8, 9, 10, 11]
+idx: 4, delta: 3, matching: false, a (7): [2, 5, 6, 8, 9, 11, 12], b (2): [3, 4, 5, 6, 11, 12]
+idx: 4, delta: 4, matching: false, a (8): [2, 5, 6, 8, 9, 11, 12], b (1): [0, 2, 3, 4, 7, 10]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 3], b (0): [4, 5, 6, 7, 10, 11, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: true, a (5): [2, 5, 6, 8, 9, 11, 12], b (6): [2, 5, 6, 8, 9, 11, 12]
+idx: 5, delta: 2, matching: false, a (7): [2, 5, 6, 8, 9, 11, 12], b (4): [0, 1, 3]
+idx: 5, delta: 3, matching: false, a (8): [2, 5, 6, 8, 9, 11, 12], b (3): [0, 2, 3, 6, 7, 8, 9, 10, 11]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 3], b (2): [3, 4, 5, 6, 11, 12]
+idx: 5, delta: 5, matching: false, a (10): [0, 2, 3, 7, 8, 9, 10], b (1): [0, 2, 3, 4, 7, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: true, a (6): [2, 5, 6, 8, 9, 11, 12], b (7): [2, 5, 6, 8, 9, 11, 12]
+idx: 6, delta: 2, matching: true, a (8): [2, 5, 6, 8, 9, 11, 12], b (5): [2, 5, 6, 8, 9, 11, 12]
+idx: 6, delta: 3, matching: true, a (9): [0, 1, 3], b (4): [0, 1, 3]
+idx: 6, delta: 4, matching: false, a (10): [0, 2, 3, 7, 8, 9, 10], b (3): [0, 2, 3, 6, 7, 8, 9, 10, 11]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: true, a (7): [2, 5, 6, 8, 9, 11, 12], b (8): [2, 5, 6, 8, 9, 11, 12]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 3], b (6): [2, 5, 6, 8, 9, 11, 12]
+idx: 7, delta: 3, matching: false, a (10): [0, 2, 3, 7, 8, 9, 10], b (5): [2, 5, 6, 8, 9, 11, 12]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [2, 5, 6, 8, 9, 11, 12], b (9): [0, 1, 3]
+idx: 8, delta: 2, matching: false, a (10): [0, 2, 3, 7, 8, 9, 10], b (7): [2, 5, 6, 8, 9, 11, 12]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 3], b (10): [0, 2, 3, 7, 8, 9, 10]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [1, 3, 4, 9, 10], b (1): [4, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [4, 9], b (2): [1, 3, 5, 6, 7, 8, 10]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 3, 4, 9, 10], b (0): [1, 3, 4, 9, 10]
+idx: 1, delta: 2 --- found smudge!
+idx: 1 --- EXITING WITH true
+.#.##....##
+....#....#.
+.#.#.####.#
+.####....##
+###........
+#.#..####..
+#.##.####..
+##.#......#
+...#.####.#
+...#.####.#
+##.#......#
+#.##.####..
+#.#..####..
+200 (vert: 0, horiz: 2)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 5, 8, 13, 14], b (1): [0, 2, 3, 6, 10, 11, 13, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 3, 6, 10, 11, 13, 14], b (2): [0, 2, 3, 4, 9, 10, 11, 13, 14]
+idx: 1, delta: 2, matching: false, a (3): [1, 5, 6, 7, 8, 12], b (0): [0, 5, 8, 13, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 3, 4, 9, 10, 11, 13, 14], b (3): [1, 5, 6, 7, 8, 12]
+idx: 2, delta: 2, matching: false, a (4): [0, 2, 3, 4, 9, 10, 11, 13, 14], b (1): [0, 2, 3, 6, 10, 11, 13, 14]
+idx: 2, delta: 3, matching: false, a (5): [3, 4, 5, 8, 9, 10], b (0): [0, 5, 8, 13, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 5, 6, 7, 8, 12], b (4): [0, 2, 3, 4, 9, 10, 11, 13, 14]
+idx: 3, delta: 2, matching: false, a (5): [3, 4, 5, 8, 9, 10], b (2): [0, 2, 3, 4, 9, 10, 11, 13, 14]
+idx: 3, delta: 3, matching: false, a (6): [1, 3, 6, 7, 10, 12], b (1): [0, 2, 3, 6, 10, 11, 13, 14]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 5, 8, 11, 12], b (0): [0, 5, 8, 13, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 2, 3, 4, 9, 10, 11, 13, 14], b (5): [3, 4, 5, 8, 9, 10]
+idx: 4, delta: 2, matching: false, a (6): [1, 3, 6, 7, 10, 12], b (3): [1, 5, 6, 7, 8, 12]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 5, 8, 11, 12], b (2): [0, 2, 3, 4, 9, 10, 11, 13, 14]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 4, 9, 11, 13, 14], b (1): [0, 2, 3, 6, 10, 11, 13, 14]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 5, 6, 7, 8, 12, 13, 14], b (0): [0, 5, 8, 13, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [3, 4, 5, 8, 9, 10], b (6): [1, 3, 6, 7, 10, 12]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 5, 8, 11, 12], b (4): [0, 2, 3, 4, 9, 10, 11, 13, 14]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 4, 9, 11, 13, 14], b (3): [1, 5, 6, 7, 8, 12]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 5, 6, 7, 8, 12, 13, 14], b (2): [0, 2, 3, 4, 9, 10, 11, 13, 14]
+idx: 5, delta: 5, matching: false, a (10): [0, 2, 5, 6, 7, 8, 11, 13, 14], b (1): [0, 2, 3, 6, 10, 11, 13, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 3, 6, 7, 10, 12], b (7): [1, 2, 5, 8, 11, 12]
+idx: 6, delta: 2, matching: false, a (8): [0, 2, 4, 9, 11, 13, 14], b (5): [3, 4, 5, 8, 9, 10]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 5, 6, 7, 8, 12, 13, 14], b (4): [0, 2, 3, 4, 9, 10, 11, 13, 14]
+idx: 6, delta: 4, matching: false, a (10): [0, 2, 5, 6, 7, 8, 11, 13, 14], b (3): [1, 5, 6, 7, 8, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 5, 8, 11, 12], b (8): [0, 2, 4, 9, 11, 13, 14]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 5, 6, 7, 8, 12, 13, 14], b (6): [1, 3, 6, 7, 10, 12]
+idx: 7, delta: 3, matching: false, a (10): [0, 2, 5, 6, 7, 8, 11, 13, 14], b (5): [3, 4, 5, 8, 9, 10]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 2, 4, 9, 11, 13, 14], b (9): [0, 1, 5, 6, 7, 8, 12, 13, 14]
+idx: 8, delta: 2, matching: false, a (10): [0, 2, 5, 6, 7, 8, 11, 13, 14], b (7): [1, 2, 5, 8, 11, 12]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 5, 6, 7, 8, 12, 13, 14], b (10): [0, 2, 5, 6, 7, 8, 11, 13, 14]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 4, 8, 9, 10], b (1): [3, 6, 7, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [3, 6, 7, 9], b (2): [1, 2, 4, 7, 8, 10]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 4, 5, 6], b (0): [0, 1, 2, 4, 8, 9, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 2, 4, 7, 8, 10], b (3): [1, 2, 4, 5, 6]
+idx: 2, delta: 2, matching: false, a (4): [2, 4, 5, 8], b (1): [3, 6, 7, 9]
+idx: 2, delta: 3, matching: false, a (5): [0, 3, 5, 7, 9, 10], b (0): [0, 1, 2, 4, 8, 9, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 4, 5, 6], b (4): [2, 4, 5, 8]
+idx: 3, delta: 2, matching: false, a (5): [0, 3, 5, 7, 9, 10], b (2): [1, 2, 4, 7, 8, 10]
+idx: 3, delta: 3, matching: false, a (6): [1, 3, 6, 9, 10], b (1): [3, 6, 7, 9]
+idx: 3, delta: 4, matching: false, a (7): [3, 6, 9, 10], b (0): [0, 1, 2, 4, 8, 9, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 4, 5, 8], b (5): [0, 3, 5, 7, 9, 10]
+idx: 4, delta: 2, matching: false, a (6): [1, 3, 6, 9, 10], b (3): [1, 2, 4, 5, 6]
+idx: 4, delta: 3, matching: false, a (7): [3, 6, 9, 10], b (2): [1, 2, 4, 7, 8, 10]
+idx: 4, delta: 4, matching: false, a (8): [0, 3, 5, 7, 9, 10], b (1): [3, 6, 7, 9]
+idx: 4, delta: 5, matching: false, a (9): [2, 4, 5, 8], b (0): [0, 1, 2, 4, 8, 9, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 3, 5, 7, 9, 10], b (6): [1, 3, 6, 9, 10]
+idx: 5, delta: 2, matching: false, a (7): [3, 6, 9, 10], b (4): [2, 4, 5, 8]
+idx: 5, delta: 3, matching: false, a (8): [0, 3, 5, 7, 9, 10], b (3): [1, 2, 4, 5, 6]
+idx: 5, delta: 4, matching: false, a (9): [2, 4, 5, 8], b (2): [1, 2, 4, 7, 8, 10]
+idx: 5, delta: 5, matching: false, a (10): [1, 2, 4, 5, 6], b (1): [3, 6, 7, 9]
+idx: 5, delta: 6, matching: false, a (11): [1, 2, 4, 7, 8, 10], b (0): [0, 1, 2, 4, 8, 9, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 3, 6, 9, 10], b (7): [3, 6, 9, 10]
+idx: 6, delta: 0 --- found smudge!
+idx: 6, delta: 2, matching: true, a (8): [0, 3, 5, 7, 9, 10], b (5): [0, 3, 5, 7, 9, 10]
+idx: 6, delta: 3, matching: true, a (9): [2, 4, 5, 8], b (4): [2, 4, 5, 8]
+idx: 6, delta: 4, matching: true, a (10): [1, 2, 4, 5, 6], b (3): [1, 2, 4, 5, 6]
+idx: 6, delta: 5, matching: true, a (11): [1, 2, 4, 7, 8, 10], b (2): [1, 2, 4, 7, 8, 10]
+idx: 6, delta: 6, matching: true, a (12): [3, 6, 7, 9], b (1): [3, 6, 7, 9]
+idx: 6, delta: 7, matching: true, a (13): [0, 1, 2, 4, 8, 9, 10], b (0): [0, 1, 2, 4, 8, 9, 10]
+idx: 6 --- EXITING WITH true
+###.#...###
+...#..##.#.
+.##.#..##.#
+.##.###....
+..#.##..#..
+#..#.#.#.##
+.#.#..#..##
+...#..#..##
+#..#.#.#.##
+..#.##..#..
+.##.###....
+.##.#..##.#
+...#..##.#.
+###.#...###
+###.#...###
+700 (vert: 0, horiz: 7)
+
+idx: 0, delta: 0, matching: false, a (0): [3, 4, 8, 11], b (1): [0, 1, 2, 3, 6, 9, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 3, 6, 9, 10], b (2): [0, 4, 6, 11]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 5, 6, 7, 9, 10, 12], b (0): [3, 4, 8, 11]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 4, 6, 11], b (3): [1, 2, 5, 6, 7, 9, 10, 12]
+idx: 2, delta: 2, matching: false, a (4): [0, 2, 3, 6, 8, 9, 10, 11], b (1): [0, 1, 2, 3, 6, 9, 10]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 6, 8, 9, 10, 11], b (0): [3, 4, 8, 11]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 5, 6, 7, 9, 10, 12], b (4): [0, 2, 3, 6, 8, 9, 10, 11]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 6, 8, 9, 10, 11], b (2): [0, 4, 6, 11]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 5, 6, 7, 9, 10, 12], b (1): [0, 1, 2, 3, 6, 9, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: true, a (4): [0, 2, 3, 6, 8, 9, 10, 11], b (5): [0, 2, 3, 6, 8, 9, 10, 11]
+idx: 4, delta: 2, matching: true, a (6): [1, 2, 5, 6, 7, 9, 10, 12], b (3): [1, 2, 5, 6, 7, 9, 10, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 3, 6, 8, 9, 10, 11], b (6): [1, 2, 5, 6, 7, 9, 10, 12]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 4, 5], b (1): [1, 3, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 3, 6], b (2): [1, 3, 4, 5, 6]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 4, 5], b (0): [1, 2, 4, 5]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 3, 4, 5, 6], b (3): [0, 1, 4, 5]
+idx: 2, delta: 2, matching: false, a (4): [0, 2], b (1): [1, 3, 6]
+idx: 2, delta: 3, matching: false, a (5): [3, 6], b (0): [1, 2, 4, 5]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 4, 5], b (4): [0, 2]
+idx: 3, delta: 2, matching: false, a (5): [3, 6], b (2): [1, 3, 4, 5, 6]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 3, 4, 5, 6], b (1): [1, 3, 6]
+idx: 3, delta: 4, matching: false, a (7): [3, 6], b (0): [1, 2, 4, 5]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 2], b (5): [3, 6]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 3, 4, 5, 6], b (3): [0, 1, 4, 5]
+idx: 4, delta: 3, matching: false, a (7): [3, 6], b (2): [1, 3, 4, 5, 6]
+idx: 4, delta: 4, matching: false, a (8): [0, 4, 5], b (1): [1, 3, 6]
+idx: 4, delta: 5, matching: false, a (9): [1, 3, 4, 5, 6], b (0): [1, 2, 4, 5]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [3, 6], b (6): [1, 2, 3, 4, 5, 6]
+idx: 5, delta: 2, matching: false, a (7): [3, 6], b (4): [0, 2]
+idx: 5, delta: 3, matching: false, a (8): [0, 4, 5], b (3): [0, 1, 4, 5]
+idx: 5, delta: 3 --- found smudge!
+idx: 5, delta: 4, matching: true, a (9): [1, 3, 4, 5, 6], b (2): [1, 3, 4, 5, 6]
+idx: 5, delta: 5, matching: false, a (10): [1, 3, 4, 5, 6], b (1): [1, 3, 6]
+idx: 5, delta: 5 --- found smudge twice!
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 3, 4, 5, 6], b (7): [3, 6]
+idx: 6, delta: 2, matching: false, a (8): [0, 4, 5], b (5): [3, 6]
+idx: 6, delta: 3, matching: false, a (9): [1, 3, 4, 5, 6], b (4): [0, 2]
+idx: 6, delta: 4, matching: false, a (10): [1, 3, 4, 5, 6], b (3): [0, 1, 4, 5]
+idx: 6, delta: 5, matching: false, a (11): [0, 2, 4, 5], b (2): [1, 3, 4, 5, 6]
+idx: 6, delta: 6, matching: false, a (12): [3, 6], b (1): [1, 3, 6]
+idx: 6, delta: 6 --- found smudge!
+idx: 6 --- EXITING WITH true
+.##.##.
+.#.#..#
+.#.####
+##..##.
+#.#....
+...#..#
+.######
+...#..#
+#...##.
+.#.####
+.#.####
+#.#.##.
+...#..#
+700 (vert: 0, horiz: 7)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 4, 7, 8], b (1): [2, 3, 6, 7, 8]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 3, 6, 7, 8], b (2): [1, 2, 3, 4, 6]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 3, 4, 6], b (0): [1, 4, 7, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: true, a (2): [1, 2, 3, 4, 6], b (3): [1, 2, 3, 4, 6]
+idx: 2, delta: 2, matching: true, a (4): [2, 3, 6, 7, 8], b (1): [2, 3, 6, 7, 8]
+idx: 2, delta: 3, matching: true, a (5): [1, 4, 7, 8], b (0): [1, 4, 7, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 3, 4, 6], b (4): [2, 3, 6, 7, 8]
+idx: 3, delta: 2, matching: false, a (5): [1, 4, 7, 8], b (2): [1, 2, 3, 4, 6]
+idx: 3, delta: 3, matching: false, a (6): [2, 3, 4, 5, 6, 7], b (1): [2, 3, 6, 7, 8]
+idx: 3, delta: 4, matching: false, a (7): [0, 2, 3, 5], b (0): [1, 4, 7, 8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 3, 6, 7, 8], b (5): [1, 4, 7, 8]
+idx: 4, delta: 2, matching: false, a (6): [2, 3, 4, 5, 6, 7], b (3): [1, 2, 3, 4, 6]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 3, 5], b (2): [1, 2, 3, 4, 6]
+idx: 4, delta: 4, matching: false, a (8): [0, 7, 8], b (1): [2, 3, 6, 7, 8]
+idx: 4, delta: 5, matching: false, a (9): [0, 2], b (0): [1, 4, 7, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 4, 7, 8], b (6): [2, 3, 4, 5, 6, 7]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 3, 5], b (4): [2, 3, 6, 7, 8]
+idx: 5, delta: 3, matching: false, a (8): [0, 7, 8], b (3): [1, 2, 3, 4, 6]
+idx: 5, delta: 4, matching: false, a (9): [0, 2], b (2): [1, 2, 3, 4, 6]
+idx: 5, delta: 5, matching: false, a (10): [3, 5, 7, 8], b (1): [2, 3, 6, 7, 8]
+idx: 5, delta: 6, matching: false, a (11): [2, 3], b (0): [1, 4, 7, 8]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [2, 3, 4, 5, 6, 7], b (7): [0, 2, 3, 5]
+idx: 6, delta: 2, matching: false, a (8): [0, 7, 8], b (5): [1, 4, 7, 8]
+idx: 6, delta: 3, matching: false, a (9): [0, 2], b (4): [2, 3, 6, 7, 8]
+idx: 6, delta: 4, matching: false, a (10): [3, 5, 7, 8], b (3): [1, 2, 3, 4, 6]
+idx: 6, delta: 5, matching: false, a (11): [2, 3], b (2): [1, 2, 3, 4, 6]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 3, 6], b (1): [2, 3, 6, 7, 8]
+idx: 6, delta: 7, matching: false, a (13): [1, 2, 3, 4], b (0): [1, 4, 7, 8]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 2, 3, 5], b (8): [0, 7, 8]
+idx: 7, delta: 2, matching: false, a (9): [0, 2], b (6): [2, 3, 4, 5, 6, 7]
+idx: 7, delta: 3, matching: false, a (10): [3, 5, 7, 8], b (5): [1, 4, 7, 8]
+idx: 7, delta: 4, matching: false, a (11): [2, 3], b (4): [2, 3, 6, 7, 8]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 3, 6], b (3): [1, 2, 3, 4, 6]
+idx: 7, delta: 6, matching: false, a (13): [1, 2, 3, 4], b (2): [1, 2, 3, 4, 6]
+idx: 7, delta: 6 --- found smudge!
+idx: 7, delta: 7, matching: false, a (14): [0, 1, 2, 4, 7, 8], b (1): [2, 3, 6, 7, 8]
+idx: 7, delta: 7 --- found smudge twice!
+idx: 8, delta: 0, matching: false, a (8): [0, 7, 8], b (9): [0, 2]
+idx: 8, delta: 2, matching: false, a (10): [3, 5, 7, 8], b (7): [0, 2, 3, 5]
+idx: 8, delta: 3, matching: false, a (11): [2, 3], b (6): [2, 3, 4, 5, 6, 7]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 3, 6], b (5): [1, 4, 7, 8]
+idx: 8, delta: 5, matching: false, a (13): [1, 2, 3, 4], b (4): [2, 3, 6, 7, 8]
+idx: 8, delta: 6, matching: false, a (14): [0, 1, 2, 4, 7, 8], b (3): [1, 2, 3, 4, 6]
+idx: 8, delta: 7, matching: false, a (15): [4, 7, 8], b (2): [1, 2, 3, 4, 6]
+idx: 8, delta: 8, matching: false, a (16): [0, 1, 2, 3, 7, 8], b (1): [2, 3, 6, 7, 8]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 2], b (10): [3, 5, 7, 8]
+idx: 9, delta: 2, matching: false, a (11): [2, 3], b (8): [0, 7, 8]
+idx: 9, delta: 3, matching: false, a (12): [0, 1, 3, 6], b (7): [0, 2, 3, 5]
+idx: 9, delta: 4, matching: false, a (13): [1, 2, 3, 4], b (6): [2, 3, 4, 5, 6, 7]
+idx: 9, delta: 5, matching: false, a (14): [0, 1, 2, 4, 7, 8], b (5): [1, 4, 7, 8]
+idx: 9, delta: 6, matching: false, a (15): [4, 7, 8], b (4): [2, 3, 6, 7, 8]
+idx: 9, delta: 7, matching: false, a (16): [0, 1, 2, 3, 7, 8], b (3): [1, 2, 3, 4, 6]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [3, 5, 7, 8], b (11): [2, 3]
+idx: 10, delta: 2, matching: false, a (12): [0, 1, 3, 6], b (9): [0, 2]
+idx: 10, delta: 3, matching: false, a (13): [1, 2, 3, 4], b (8): [0, 7, 8]
+idx: 10, delta: 4, matching: false, a (14): [0, 1, 2, 4, 7, 8], b (7): [0, 2, 3, 5]
+idx: 10, delta: 5, matching: false, a (15): [4, 7, 8], b (6): [2, 3, 4, 5, 6, 7]
+idx: 10, delta: 6, matching: false, a (16): [0, 1, 2, 3, 7, 8], b (5): [1, 4, 7, 8]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [2, 3], b (12): [0, 1, 3, 6]
+idx: 11, delta: 2, matching: false, a (13): [1, 2, 3, 4], b (10): [3, 5, 7, 8]
+idx: 11, delta: 3, matching: false, a (14): [0, 1, 2, 4, 7, 8], b (9): [0, 2]
+idx: 11, delta: 4, matching: false, a (15): [4, 7, 8], b (8): [0, 7, 8]
+idx: 11, delta: 5, matching: false, a (16): [0, 1, 2, 3, 7, 8], b (7): [0, 2, 3, 5]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 1, 3, 6], b (13): [1, 2, 3, 4]
+idx: 12, delta: 2, matching: false, a (14): [0, 1, 2, 4, 7, 8], b (11): [2, 3]
+idx: 12, delta: 3, matching: false, a (15): [4, 7, 8], b (10): [3, 5, 7, 8]
+idx: 12, delta: 4, matching: false, a (16): [0, 1, 2, 3, 7, 8], b (9): [0, 2]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [1, 2, 3, 4], b (14): [0, 1, 2, 4, 7, 8]
+idx: 13, delta: 2, matching: false, a (15): [4, 7, 8], b (12): [0, 1, 3, 6]
+idx: 13, delta: 3, matching: false, a (16): [0, 1, 2, 3, 7, 8], b (11): [2, 3]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [0, 1, 2, 4, 7, 8], b (15): [4, 7, 8]
+idx: 14, delta: 2, matching: false, a (16): [0, 1, 2, 3, 7, 8], b (13): [1, 2, 3, 4]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: false, a (15): [4, 7, 8], b (16): [0, 1, 2, 3, 7, 8]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [7, 8, 9, 12, 14, 16], b (1): [0, 2, 3, 5, 12, 13, 14, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 3, 5, 12, 13, 14, 16], b (2): [1, 2, 3, 4, 6, 7, 9, 11, 13, 14, 16]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 3, 4, 6, 7, 10, 11, 12, 13, 16], b (0): [7, 8, 9, 12, 14, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 2, 3, 4, 6, 7, 9, 11, 13, 14, 16], b (3): [1, 2, 3, 4, 6, 7, 10, 11, 12, 13, 16]
+idx: 2, delta: 2, matching: false, a (4): [0, 2, 3, 5, 6, 13, 14, 15], b (1): [0, 2, 3, 5, 12, 13, 14, 16]
+idx: 2, delta: 3, matching: false, a (5): [6, 7, 10], b (0): [7, 8, 9, 12, 14, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 3, 4, 6, 7, 10, 11, 12, 13, 16], b (4): [0, 2, 3, 5, 6, 13, 14, 15]
+idx: 3, delta: 2, matching: false, a (5): [6, 7, 10], b (2): [1, 2, 3, 4, 6, 7, 9, 11, 13, 14, 16]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 3, 4, 6, 12], b (1): [0, 2, 3, 5, 12, 13, 14, 16]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 4, 5, 6, 8, 10, 14, 15, 16], b (0): [7, 8, 9, 12, 14, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 2, 3, 5, 6, 13, 14, 15], b (5): [6, 7, 10]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 3, 4, 6, 12], b (3): [1, 2, 3, 4, 6, 7, 10, 11, 12, 13, 16]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 4, 5, 6, 8, 10, 14, 15, 16], b (2): [1, 2, 3, 4, 6, 7, 9, 11, 13, 14, 16]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 4, 5, 8, 10, 14, 15, 16], b (1): [0, 2, 3, 5, 12, 13, 14, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [6, 7, 10], b (6): [1, 2, 3, 4, 6, 12]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 4, 5, 6, 8, 10, 14, 15, 16], b (4): [0, 2, 3, 5, 6, 13, 14, 15]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 4, 5, 8, 10, 14, 15, 16], b (3): [1, 2, 3, 4, 6, 7, 10, 11, 12, 13, 16]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 3, 4, 6, 12], b (7): [0, 1, 4, 5, 6, 8, 10, 14, 15, 16]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 4, 5, 8, 10, 14, 15, 16], b (5): [6, 7, 10]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 4, 5, 6, 8, 10, 14, 15, 16], b (8): [0, 1, 4, 5, 8, 10, 14, 15, 16]
+idx: 7, delta: 0 --- found smudge!
+idx: 7 --- EXITING WITH true
+.......###..#.#.#
+#.##.#......###.#
+.####.##.#.#.##.#
+.####.##..####..#
+#.##.##......###.
+......##..#......
+.####.#.....#....
+##..###.#.#...###
+##..##..#.#...###
+800 (vert: 0, horiz: 8)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 5, 6, 7, 8, 11, 12, 14, 15, 16], b (1): [2, 3, 6, 7, 10, 11, 15, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 3, 6, 7, 10, 11, 15, 16], b (2): [0, 4, 5, 8, 9, 13, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 16], b (0): [1, 5, 6, 7, 8, 11, 12, 14, 15, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 4, 5, 8, 9, 13, 15, 16], b (3): [0, 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 16]
+idx: 2, delta: 2, matching: false, a (4): [3, 4, 5, 6, 7, 8, 9, 10, 15], b (1): [2, 3, 6, 7, 10, 11, 15, 16]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 4, 5, 8, 9, 12, 13, 14, 15, 16], b (0): [1, 5, 6, 7, 8, 11, 12, 14, 15, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 16], b (4): [3, 4, 5, 6, 7, 8, 9, 10, 15]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 4, 5, 8, 9, 12, 13, 14, 15, 16], b (2): [0, 4, 5, 8, 9, 13, 15, 16]
+idx: 3, delta: 3, matching: false, a (6): [0, 3, 4, 9, 10, 13, 14, 15, 16], b (1): [2, 3, 6, 7, 10, 11, 15, 16]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 3, 10, 11, 12, 14], b (0): [1, 5, 6, 7, 8, 11, 12, 14, 15, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [3, 4, 5, 6, 7, 8, 9, 10, 15], b (5): [0, 1, 4, 5, 8, 9, 12, 13, 14, 15, 16]
+idx: 4, delta: 2, matching: false, a (6): [0, 3, 4, 9, 10, 13, 14, 15, 16], b (3): [0, 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 16]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 3, 10, 11, 12, 14], b (2): [0, 4, 5, 8, 9, 13, 15, 16]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 6, 7, 11, 12, 13, 15], b (1): [2, 3, 6, 7, 10, 11, 15, 16]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 6, 7, 11, 12, 13, 15], b (0): [1, 5, 6, 7, 8, 11, 12, 14, 15, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 4, 5, 8, 9, 12, 13, 14, 15, 16], b (6): [0, 3, 4, 9, 10, 13, 14, 15, 16]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 3, 10, 11, 12, 14], b (4): [3, 4, 5, 6, 7, 8, 9, 10, 15]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 6, 7, 11, 12, 13, 15], b (3): [0, 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 16]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 6, 7, 11, 12, 13, 15], b (2): [0, 4, 5, 8, 9, 13, 15, 16]
+idx: 5, delta: 5, matching: false, a (10): [1, 2, 3, 10, 11, 12, 14], b (1): [2, 3, 6, 7, 10, 11, 15, 16]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 3, 4, 9, 10, 13, 14, 15, 16], b (7): [1, 2, 3, 10, 11, 12, 14]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 6, 7, 11, 12, 13, 15], b (5): [0, 1, 4, 5, 8, 9, 12, 13, 14, 15, 16]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 6, 7, 11, 12, 13, 15], b (4): [3, 4, 5, 6, 7, 8, 9, 10, 15]
+idx: 6, delta: 4, matching: false, a (10): [1, 2, 3, 10, 11, 12, 14], b (3): [0, 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 16]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 3, 10, 11, 12, 14], b (8): [0, 1, 2, 6, 7, 11, 12, 13, 15]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 2, 6, 7, 11, 12, 13, 15], b (6): [0, 3, 4, 9, 10, 13, 14, 15, 16]
+idx: 7, delta: 3, matching: false, a (10): [1, 2, 3, 10, 11, 12, 14], b (5): [0, 1, 4, 5, 8, 9, 12, 13, 14, 15, 16]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: true, a (8): [0, 1, 2, 6, 7, 11, 12, 13, 15], b (9): [0, 1, 2, 6, 7, 11, 12, 13, 15]
+idx: 8, delta: 2, matching: true, a (10): [1, 2, 3, 10, 11, 12, 14], b (7): [1, 2, 3, 10, 11, 12, 14]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 2, 6, 7, 11, 12, 13, 15], b (10): [1, 2, 3, 10, 11, 12, 14]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [2, 3, 5, 6, 8, 9], b (1): [0, 3, 5, 7, 8, 9, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 3, 5, 7, 8, 9, 10], b (2): [1, 3, 7, 8, 9, 10]
+idx: 1, delta: 2, matching: false, a (3): [1, 4, 6, 7, 10], b (0): [2, 3, 5, 6, 8, 9]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 3, 7, 8, 9, 10], b (3): [1, 4, 6, 7, 10]
+idx: 2, delta: 2, matching: false, a (4): [2, 3, 4, 5, 6], b (1): [0, 3, 5, 7, 8, 9, 10]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 4, 5], b (0): [2, 3, 5, 6, 8, 9]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 4, 6, 7, 10], b (4): [2, 3, 4, 5, 6]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 4, 5], b (2): [1, 3, 7, 8, 9, 10]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 3, 4, 8, 9], b (1): [0, 3, 5, 7, 8, 9, 10]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 3, 4, 8, 9], b (0): [2, 3, 5, 6, 8, 9]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 3, 4, 5, 6], b (5): [0, 2, 3, 4, 5]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 3, 4, 8, 9], b (3): [1, 4, 6, 7, 10]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 3, 4, 8, 9], b (2): [1, 3, 7, 8, 9, 10]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 3, 4, 5], b (1): [0, 3, 5, 7, 8, 9, 10]
+idx: 4, delta: 5, matching: false, a (9): [2, 3, 4, 5, 6], b (0): [2, 3, 5, 6, 8, 9]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 3, 4, 5], b (6): [0, 1, 3, 4, 8, 9]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 3, 4, 8, 9], b (4): [2, 3, 4, 5, 6]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 3, 4, 5], b (3): [1, 4, 6, 7, 10]
+idx: 5, delta: 4, matching: false, a (9): [2, 3, 4, 5, 6], b (2): [1, 3, 7, 8, 9, 10]
+idx: 5, delta: 5, matching: false, a (10): [1, 4, 6, 7, 10], b (1): [0, 3, 5, 7, 8, 9, 10]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 3, 7, 8, 9, 10], b (0): [2, 3, 5, 6, 8, 9]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: true, a (6): [0, 1, 3, 4, 8, 9], b (7): [0, 1, 3, 4, 8, 9]
+idx: 6, delta: 2, matching: true, a (8): [0, 2, 3, 4, 5], b (5): [0, 2, 3, 4, 5]
+idx: 6, delta: 3, matching: true, a (9): [2, 3, 4, 5, 6], b (4): [2, 3, 4, 5, 6]
+idx: 6, delta: 4, matching: true, a (10): [1, 4, 6, 7, 10], b (3): [1, 4, 6, 7, 10]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 3, 7, 8, 9, 10], b (2): [1, 3, 7, 8, 9, 10]
+idx: 6, delta: 5 --- found smudge!
+idx: 6, delta: 6, matching: true, a (12): [0, 3, 5, 7, 8, 9, 10], b (1): [0, 3, 5, 7, 8, 9, 10]
+idx: 6, delta: 7, matching: true, a (13): [2, 3, 5, 6, 8, 9], b (0): [2, 3, 5, 6, 8, 9]
+idx: 6 --- EXITING WITH true
+..##.##.##.
+#..#.#.####
+.#.#...####
+.#..#.##..#
+..#####....
+#.####.....
+##.##...##.
+##.##...##.
+#.####.....
+..#####....
+.#..#.##..#
+##.#...####
+#..#.#.####
+..##.##.##.
+#..#.###..#
+###.###.##.
+####.##....
+700 (vert: 0, horiz: 7)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 6, 7, 8], b (1): [1, 2, 3, 4, 5, 6, 8]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 3, 4, 5, 6, 8], b (2): [0, 3, 4, 7, 8]
+idx: 1, delta: 2, matching: false, a (3): [3, 4], b (0): [0, 1, 6, 7, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 4, 7, 8], b (3): [3, 4]
+idx: 2, delta: 2, matching: false, a (4): [0, 2, 5, 7, 8], b (1): [1, 2, 3, 4, 5, 6, 8]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 5, 7, 8], b (0): [0, 1, 6, 7, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [3, 4], b (4): [0, 2, 5, 7, 8]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 5, 7, 8], b (2): [0, 3, 4, 7, 8]
+idx: 3, delta: 3, matching: false, a (6): [0, 3, 4, 7, 8], b (1): [1, 2, 3, 4, 5, 6, 8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: true, a (4): [0, 2, 5, 7, 8], b (5): [0, 2, 5, 7, 8]
+idx: 4, delta: 2, matching: false, a (6): [0, 3, 4, 7, 8], b (3): [3, 4]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 5, 7, 8], b (6): [0, 3, 4, 7, 8]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 4, 5, 6], b (1): [0, 1]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1], b (2): [1, 4, 5]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 3, 6], b (0): [0, 2, 4, 5, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 4, 5], b (3): [1, 2, 3, 6]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 6], b (1): [0, 1]
+idx: 2, delta: 3, matching: false, a (5): [1, 4, 5], b (0): [0, 2, 4, 5, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [1, 2, 3, 6], b (4): [1, 2, 3, 6]
+idx: 3, delta: 2, matching: true, a (5): [1, 4, 5], b (2): [1, 4, 5]
+idx: 3, delta: 3, matching: true, a (6): [0, 1], b (1): [0, 1]
+idx: 3, delta: 4, matching: true, a (7): [0, 2, 4, 5, 6], b (0): [0, 2, 4, 5, 6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 6], b (5): [1, 4, 5]
+idx: 4, delta: 2, matching: false, a (6): [0, 1], b (3): [1, 2, 3, 6]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 4, 5, 6], b (2): [1, 4, 5]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 4, 5, 6], b (1): [0, 1]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 4, 5], b (6): [0, 1]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 4, 5, 6], b (4): [1, 2, 3, 6]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 4, 5, 6], b (3): [1, 2, 3, 6]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1], b (7): [0, 2, 4, 5, 6]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 4, 5, 6], b (5): [1, 4, 5]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 2, 4, 5, 6], b (8): [0, 1, 2, 4, 5, 6]
+idx: 7, delta: 0 --- found smudge!
+idx: 7 --- EXITING WITH true
+#.#.###
+##.....
+.#..##.
+.###..#
+.###..#
+.#..##.
+##.....
+#.#.###
+###.###
+800 (vert: 0, horiz: 8)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 5, 6, 9, 10, 11, 12], b (1): [0, 1, 2, 4, 7, 9, 10, 11]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 4, 7, 9, 10, 11], b (2): [6, 10, 11]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 4, 6, 7, 8, 10, 11], b (0): [0, 2, 5, 6, 9, 10, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [6, 10, 11], b (3): [1, 2, 4, 6, 7, 8, 10, 11]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 4, 5, 7, 8, 10, 11], b (1): [0, 1, 2, 4, 7, 9, 10, 11]
+idx: 2, delta: 3, matching: false, a (5): [4, 6], b (0): [0, 2, 5, 6, 9, 10, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 4, 6, 7, 8, 10, 11], b (4): [0, 1, 4, 5, 7, 8, 10, 11]
+idx: 3, delta: 2, matching: false, a (5): [4, 6], b (2): [6, 10, 11]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 5, 6], b (1): [0, 1, 2, 4, 7, 9, 10, 11]
+idx: 3, delta: 4, matching: false, a (7): [2, 6, 7, 8, 10, 11], b (0): [0, 2, 5, 6, 9, 10, 11, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 4, 5, 7, 8, 10, 11], b (5): [4, 6]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 5, 6], b (3): [1, 2, 4, 6, 7, 8, 10, 11]
+idx: 4, delta: 3, matching: false, a (7): [2, 6, 7, 8, 10, 11], b (2): [6, 10, 11]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 5, 6, 7, 8, 10, 11], b (1): [0, 1, 2, 4, 7, 9, 10, 11]
+idx: 4, delta: 5, matching: false, a (9): [6, 7, 10, 11], b (0): [0, 2, 5, 6, 9, 10, 11, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [4, 6], b (6): [1, 2, 5, 6]
+idx: 5, delta: 2, matching: false, a (7): [2, 6, 7, 8, 10, 11], b (4): [0, 1, 4, 5, 7, 8, 10, 11]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 5, 6, 7, 8, 10, 11], b (3): [1, 2, 4, 6, 7, 8, 10, 11]
+idx: 5, delta: 4, matching: false, a (9): [6, 7, 10, 11], b (2): [6, 10, 11]
+idx: 5, delta: 4 --- found smudge!
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 3, 8, 10, 11], b (1): [0, 1, 2, 4, 7, 9, 10, 11]
+idx: 5, delta: 5 --- found smudge twice!
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 5, 6], b (7): [2, 6, 7, 8, 10, 11]
+idx: 6, delta: 2, matching: false, a (8): [0, 2, 5, 6, 7, 8, 10, 11], b (5): [4, 6]
+idx: 6, delta: 3, matching: false, a (9): [6, 7, 10, 11], b (4): [0, 1, 4, 5, 7, 8, 10, 11]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 3, 8, 10, 11], b (3): [1, 2, 4, 6, 7, 8, 10, 11]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 2, 3, 4, 5, 8], b (2): [6, 10, 11]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 2, 3, 4, 5, 8], b (1): [0, 1, 2, 4, 7, 9, 10, 11]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [2, 6, 7, 8, 10, 11], b (8): [0, 2, 5, 6, 7, 8, 10, 11]
+idx: 7, delta: 2, matching: false, a (9): [6, 7, 10, 11], b (6): [1, 2, 5, 6]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 3, 8, 10, 11], b (5): [4, 6]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 2, 3, 4, 5, 8], b (4): [0, 1, 4, 5, 7, 8, 10, 11]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 2, 3, 4, 5, 8], b (3): [1, 2, 4, 6, 7, 8, 10, 11]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 2, 5, 6, 7, 8, 10, 11], b (9): [6, 7, 10, 11]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 3, 8, 10, 11], b (7): [2, 6, 7, 8, 10, 11]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 2, 3, 4, 5, 8], b (6): [1, 2, 5, 6]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 2, 3, 4, 5, 8], b (5): [4, 6]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [6, 7, 10, 11], b (10): [0, 1, 3, 8, 10, 11]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 2, 3, 4, 5, 8], b (8): [0, 2, 5, 6, 7, 8, 10, 11]
+idx: 9, delta: 3, matching: false, a (12): [0, 1, 2, 3, 4, 5, 8], b (7): [2, 6, 7, 8, 10, 11]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 3, 8, 10, 11], b (11): [0, 1, 2, 3, 4, 5, 8]
+idx: 10, delta: 2, matching: false, a (12): [0, 1, 2, 3, 4, 5, 8], b (9): [6, 7, 10, 11]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: true, a (11): [0, 1, 2, 3, 4, 5, 8], b (12): [0, 1, 2, 3, 4, 5, 8]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 4, 8, 10, 11, 12], b (1): [1, 3, 4, 6, 10, 11, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 3, 4, 6, 10, 11, 12], b (2): [0, 1, 3, 6, 7, 8, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [10, 11, 12], b (0): [0, 1, 4, 8, 10, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 3, 6, 7, 8, 11, 12], b (3): [10, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [1, 3, 4, 5, 11, 12], b (1): [1, 3, 4, 6, 10, 11, 12]
+idx: 2, delta: 3, matching: false, a (5): [0, 4, 6, 8, 11, 12], b (0): [0, 1, 4, 8, 10, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [10, 11, 12], b (4): [1, 3, 4, 5, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [0, 4, 6, 8, 11, 12], b (2): [0, 1, 3, 6, 7, 8, 11, 12]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 3, 5, 6, 7, 8, 9], b (1): [1, 3, 4, 6, 10, 11, 12]
+idx: 3, delta: 4, matching: false, a (7): [1, 3, 4, 7, 8, 9], b (0): [0, 1, 4, 8, 10, 11, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 3, 4, 5, 11, 12], b (5): [0, 4, 6, 8, 11, 12]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 3, 5, 6, 7, 8, 9], b (3): [10, 11, 12]
+idx: 4, delta: 3, matching: false, a (7): [1, 3, 4, 7, 8, 9], b (2): [0, 1, 3, 6, 7, 8, 11, 12]
+idx: 4, delta: 4, matching: false, a (8): [3, 4, 7, 8, 10, 11, 12], b (1): [1, 3, 4, 6, 10, 11, 12]
+idx: 4, delta: 5, matching: false, a (9): [0, 1], b (0): [0, 1, 4, 8, 10, 11, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 4, 6, 8, 11, 12], b (6): [0, 2, 3, 5, 6, 7, 8, 9]
+idx: 5, delta: 2, matching: false, a (7): [1, 3, 4, 7, 8, 9], b (4): [1, 3, 4, 5, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [3, 4, 7, 8, 10, 11, 12], b (3): [10, 11, 12]
+idx: 5, delta: 4, matching: false, a (9): [0, 1], b (2): [0, 1, 3, 6, 7, 8, 11, 12]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 2, 3, 4, 7, 8, 9, 10], b (1): [1, 3, 4, 6, 10, 11, 12]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2, 3, 4, 7, 8, 9, 10], b (0): [0, 1, 4, 8, 10, 11, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 2, 3, 5, 6, 7, 8, 9], b (7): [1, 3, 4, 7, 8, 9]
+idx: 6, delta: 2, matching: false, a (8): [3, 4, 7, 8, 10, 11, 12], b (5): [0, 4, 6, 8, 11, 12]
+idx: 6, delta: 3, matching: false, a (9): [0, 1], b (4): [1, 3, 4, 5, 11, 12]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 2, 3, 4, 7, 8, 9, 10], b (3): [10, 11, 12]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 2, 3, 4, 7, 8, 9, 10], b (2): [0, 1, 3, 6, 7, 8, 11, 12]
+idx: 6, delta: 6, matching: false, a (12): [0], b (1): [1, 3, 4, 6, 10, 11, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 3, 4, 7, 8, 9], b (8): [3, 4, 7, 8, 10, 11, 12]
+idx: 7, delta: 2, matching: false, a (9): [0, 1], b (6): [0, 2, 3, 5, 6, 7, 8, 9]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 2, 3, 4, 7, 8, 9, 10], b (5): [0, 4, 6, 8, 11, 12]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 2, 3, 4, 7, 8, 9, 10], b (4): [1, 3, 4, 5, 11, 12]
+idx: 7, delta: 5, matching: false, a (12): [0], b (3): [10, 11, 12]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [3, 4, 7, 8, 10, 11, 12], b (9): [0, 1]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 2, 3, 4, 7, 8, 9, 10], b (7): [1, 3, 4, 7, 8, 9]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 2, 3, 4, 7, 8, 9, 10], b (6): [0, 2, 3, 5, 6, 7, 8, 9]
+idx: 8, delta: 4, matching: false, a (12): [0], b (5): [0, 4, 6, 8, 11, 12]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1], b (10): [0, 1, 2, 3, 4, 7, 8, 9, 10]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 2, 3, 4, 7, 8, 9, 10], b (8): [3, 4, 7, 8, 10, 11, 12]
+idx: 9, delta: 3, matching: false, a (12): [0], b (7): [1, 3, 4, 7, 8, 9]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: true, a (10): [0, 1, 2, 3, 4, 7, 8, 9, 10], b (11): [0, 1, 2, 3, 4, 7, 8, 9, 10]
+idx: 10, delta: 2, matching: false, a (12): [0], b (9): [0, 1]
+idx: 10, delta: 2 --- found smudge!
+idx: 10 --- EXITING WITH true
+##..#...#.###
+.#.##.#...###
+##.#..###..##
+..........###
+.#.###.....##
+#...#.#.#..##
+#.##.#####...
+.#.##..###...
+...##..##.###
+##...........
+#####..####..
+#####..####..
+#............
+1100 (vert: 0, horiz: 11)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 4, 5, 6], b (1): [0, 2, 4, 6, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 4, 6, 9], b (2): [0, 2, 6, 7, 10]
+idx: 1, delta: 2, matching: false, a (3): [3, 4, 7, 8, 9, 10], b (0): [0, 4, 5, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 6, 7, 10], b (3): [3, 4, 7, 8, 9, 10]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 4, 5, 6, 7, 10], b (1): [0, 2, 4, 6, 9]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 3, 4, 8, 9], b (0): [0, 4, 5, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [3, 4, 7, 8, 9, 10], b (4): [0, 1, 3, 4, 5, 6, 7, 10]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 3, 4, 8, 9], b (2): [0, 2, 6, 7, 10]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 3, 4, 8, 9], b (1): [0, 2, 4, 6, 9]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3, 4, 5, 6, 7, 10], b (5): [0, 1, 2, 3, 4, 8, 9]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 3, 4, 8, 9], b (3): [3, 4, 7, 8, 9, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: true, a (5): [0, 1, 2, 3, 4, 8, 9], b (6): [0, 1, 2, 3, 4, 8, 9]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 4, 5, 6], b (1): [4, 5, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [4, 5, 6], b (2): [1, 2, 5, 6]
+idx: 1, delta: 2, matching: false, a (3): [3, 4, 5, 6], b (0): [0, 1, 2, 4, 5, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 2, 5, 6], b (3): [3, 4, 5, 6]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 4, 5, 6], b (1): [4, 5, 6]
+idx: 2, delta: 3, matching: false, a (5): [0, 4], b (0): [0, 1, 2, 4, 5, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [3, 4, 5, 6], b (4): [0, 1, 3, 4, 5, 6]
+idx: 3, delta: 2, matching: false, a (5): [0, 4], b (2): [1, 2, 5, 6]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 4], b (1): [4, 5, 6]
+idx: 3, delta: 4, matching: false, a (7): [2, 3, 4], b (0): [0, 1, 2, 4, 5, 6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3, 4, 5, 6], b (5): [0, 4]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 4], b (3): [3, 4, 5, 6]
+idx: 4, delta: 3, matching: false, a (7): [2, 3, 4], b (2): [1, 2, 5, 6]
+idx: 4, delta: 4, matching: false, a (8): [3, 5, 6], b (1): [4, 5, 6]
+idx: 4, delta: 5, matching: false, a (9): [1, 3, 5, 6], b (0): [0, 1, 2, 4, 5, 6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 4], b (6): [0, 1, 2, 4]
+idx: 5, delta: 2, matching: false, a (7): [2, 3, 4], b (4): [0, 1, 3, 4, 5, 6]
+idx: 5, delta: 3, matching: false, a (8): [3, 5, 6], b (3): [3, 4, 5, 6]
+idx: 5, delta: 3 --- found smudge!
+idx: 5, delta: 4, matching: false, a (9): [1, 3, 5, 6], b (2): [1, 2, 5, 6]
+idx: 5, delta: 4 --- found smudge twice!
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 4], b (7): [2, 3, 4]
+idx: 6, delta: 2, matching: false, a (8): [3, 5, 6], b (5): [0, 4]
+idx: 6, delta: 3, matching: false, a (9): [1, 3, 5, 6], b (4): [0, 1, 3, 4, 5, 6]
+idx: 6, delta: 4, matching: false, a (10): [2, 3, 4], b (3): [3, 4, 5, 6]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [2, 3, 4], b (8): [3, 5, 6]
+idx: 7, delta: 2, matching: false, a (9): [1, 3, 5, 6], b (6): [0, 1, 2, 4]
+idx: 7, delta: 3, matching: false, a (10): [2, 3, 4], b (5): [0, 4]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [3, 5, 6], b (9): [1, 3, 5, 6]
+idx: 8, delta: 0 --- found smudge!
+idx: 8, delta: 2, matching: true, a (10): [2, 3, 4], b (7): [2, 3, 4]
+idx: 8 --- EXITING WITH true
+###.###
+....###
+.##..##
+...####
+##.####
+#...#..
+###.#..
+..###..
+...#.##
+.#.#.##
+..###..
+900 (vert: 0, horiz: 9)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 4, 5, 6, 7, 8, 10, 11], b (1): [3, 4, 7, 9, 11, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [3, 4, 7, 9, 11, 12], b (2): [0, 5, 6, 7, 8, 10, 12]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 4, 7, 9, 10], b (0): [0, 4, 5, 6, 7, 8, 10, 11]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 5, 6, 7, 8, 10, 12], b (3): [0, 1, 2, 4, 7, 9, 10]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 9, 11, 12], b (1): [3, 4, 7, 9, 11, 12]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 3, 9, 11, 12], b (0): [0, 4, 5, 6, 7, 8, 10, 11]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 4, 7, 9, 10], b (4): [0, 1, 3, 9, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 3, 9, 11, 12], b (2): [0, 5, 6, 7, 8, 10, 12]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 4, 7, 9, 10], b (1): [3, 4, 7, 9, 11, 12]
+idx: 3, delta: 4, matching: false, a (7): [0, 5, 7, 8, 10, 12], b (0): [0, 4, 5, 6, 7, 8, 10, 11]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: true, a (4): [0, 1, 3, 9, 11, 12], b (5): [0, 1, 3, 9, 11, 12]
+idx: 4, delta: 2, matching: true, a (6): [0, 1, 2, 4, 7, 9, 10], b (3): [0, 1, 2, 4, 7, 9, 10]
+idx: 4, delta: 3, matching: false, a (7): [0, 5, 7, 8, 10, 12], b (2): [0, 5, 6, 7, 8, 10, 12]
+idx: 4, delta: 3 --- found smudge!
+idx: 4, delta: 4, matching: true, a (8): [3, 4, 7, 9, 11, 12], b (1): [3, 4, 7, 9, 11, 12]
+idx: 4, delta: 5, matching: true, a (9): [0, 4, 5, 6, 7, 8, 10, 11], b (0): [0, 4, 5, 6, 7, 8, 10, 11]
+idx: 4 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 3, 4, 5, 6, 7, 9, 10], b (1): [3, 4, 5, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [3, 4, 5, 6], b (2): [3, 6]
+idx: 1, delta: 2, matching: false, a (3): [1, 4, 5, 8], b (0): [0, 2, 3, 4, 5, 6, 7, 9, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 6], b (3): [1, 4, 5, 8]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 6, 8, 9, 10], b (1): [3, 4, 5, 6]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 7, 9, 10], b (0): [0, 2, 3, 4, 5, 6, 7, 9, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 4, 5, 8], b (4): [0, 1, 3, 6, 8, 9, 10]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 7, 9, 10], b (2): [3, 6]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 9, 10], b (1): [3, 4, 5, 6]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2, 3, 6, 7, 8, 9, 10], b (0): [0, 2, 3, 4, 5, 6, 7, 9, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3, 6, 8, 9, 10], b (5): [0, 2, 7, 9, 10]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 9, 10], b (3): [1, 4, 5, 8]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 2, 3, 6, 7, 8, 9, 10], b (2): [3, 6]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 7, 9, 10], b (1): [3, 4, 5, 6]
+idx: 4, delta: 5, matching: false, a (9): [1, 3, 4, 5, 6, 8], b (0): [0, 2, 3, 4, 5, 6, 7, 9, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 7, 9, 10], b (6): [0, 2, 9, 10]
+idx: 5, delta: 0 --- found smudge!
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2, 3, 6, 7, 8, 9, 10], b (4): [0, 1, 3, 6, 8, 9, 10]
+idx: 5, delta: 2 --- found smudge twice!
+idx: 6, delta: 0, matching: false, a (6): [0, 2, 9, 10], b (7): [0, 1, 2, 3, 6, 7, 8, 9, 10]
+idx: 6, delta: 2, matching: true, a (8): [0, 2, 7, 9, 10], b (5): [0, 2, 7, 9, 10]
+idx: 6, delta: 3, matching: false, a (9): [1, 3, 4, 5, 6, 8], b (4): [0, 1, 3, 6, 8, 9, 10]
+idx: 6, delta: 4, matching: false, a (10): [0, 2, 3, 6, 7, 9, 10], b (3): [1, 4, 5, 8]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 4, 5, 8, 9, 10], b (2): [3, 6]
+idx: 6, delta: 6, matching: false, a (12): [1, 2, 4, 5, 7, 8], b (1): [3, 4, 5, 6]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 2, 3, 6, 7, 8, 9, 10], b (8): [0, 2, 7, 9, 10]
+idx: 7, delta: 2, matching: false, a (9): [1, 3, 4, 5, 6, 8], b (6): [0, 2, 9, 10]
+idx: 7, delta: 3, matching: false, a (10): [0, 2, 3, 6, 7, 9, 10], b (5): [0, 2, 7, 9, 10]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 4, 5, 8, 9, 10], b (4): [0, 1, 3, 6, 8, 9, 10]
+idx: 7, delta: 5, matching: false, a (12): [1, 2, 4, 5, 7, 8], b (3): [1, 4, 5, 8]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 2, 7, 9, 10], b (9): [1, 3, 4, 5, 6, 8]
+idx: 8, delta: 2, matching: false, a (10): [0, 2, 3, 6, 7, 9, 10], b (7): [0, 1, 2, 3, 6, 7, 8, 9, 10]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 4, 5, 8, 9, 10], b (6): [0, 2, 9, 10]
+idx: 8, delta: 4, matching: false, a (12): [1, 2, 4, 5, 7, 8], b (5): [0, 2, 7, 9, 10]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 3, 4, 5, 6, 8], b (10): [0, 2, 3, 6, 7, 9, 10]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 4, 5, 8, 9, 10], b (8): [0, 2, 7, 9, 10]
+idx: 9, delta: 3, matching: false, a (12): [1, 2, 4, 5, 7, 8], b (7): [0, 1, 2, 3, 6, 7, 8, 9, 10]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 2, 3, 6, 7, 9, 10], b (11): [0, 1, 4, 5, 8, 9, 10]
+idx: 10, delta: 2, matching: false, a (12): [1, 2, 4, 5, 7, 8], b (9): [1, 3, 4, 5, 6, 8]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 4, 5, 8, 9, 10], b (12): [1, 2, 4, 5, 7, 8]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+#.######.##
+...####....
+...#..#....
+.#..##..#..
+##.#..#.###
+#.#....#.##
+#.#......##
+####..#####
+#.#....#.##
+.#.####.#..
+#.##..##.##
+##..##..###
+.##.##.##..
+5 (vert: 5, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [4, 5, 6, 7], b (1): [2, 5, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 5, 6], b (2): [0, 3, 5, 6, 7, 8]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 6, 8], b (0): [4, 5, 6, 7]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 5, 6, 7, 8], b (3): [0, 1, 6, 8]
+idx: 2, delta: 2, matching: false, a (4): [0, 3, 4, 5, 6, 7], b (1): [2, 5, 6]
+idx: 2, delta: 3, matching: false, a (5): [6, 8], b (0): [4, 5, 6, 7]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 6, 8], b (4): [0, 3, 4, 5, 6, 7]
+idx: 3, delta: 2, matching: false, a (5): [6, 8], b (2): [0, 3, 5, 6, 7, 8]
+idx: 3, delta: 3, matching: false, a (6): [6, 8], b (1): [2, 5, 6]
+idx: 3, delta: 4, matching: false, a (7): [0, 3, 4, 5, 6, 7], b (0): [4, 5, 6, 7]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 3, 4, 5, 6, 7], b (5): [6, 8]
+idx: 4, delta: 2, matching: false, a (6): [6, 8], b (3): [0, 1, 6, 8]
+idx: 4, delta: 3, matching: false, a (7): [0, 3, 4, 5, 6, 7], b (2): [0, 3, 5, 6, 7, 8]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 6, 8], b (1): [2, 5, 6]
+idx: 4, delta: 5, matching: false, a (9): [0, 3, 5, 6, 7, 8], b (0): [4, 5, 6, 7]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: true, a (5): [6, 8], b (6): [6, 8]
+idx: 5, delta: 2, matching: true, a (7): [0, 3, 4, 5, 6, 7], b (4): [0, 3, 4, 5, 6, 7]
+idx: 5, delta: 3, matching: true, a (8): [0, 1, 6, 8], b (3): [0, 1, 6, 8]
+idx: 5, delta: 4, matching: true, a (9): [0, 3, 5, 6, 7, 8], b (2): [0, 3, 5, 6, 7, 8]
+idx: 5, delta: 5, matching: true, a (10): [2, 5, 6], b (1): [2, 5, 6]
+idx: 5, delta: 6, matching: true, a (11): [4, 5, 6, 7], b (0): [4, 5, 6, 7]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [6, 8], b (7): [0, 3, 4, 5, 6, 7]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 6, 8], b (5): [6, 8]
+idx: 6, delta: 3, matching: false, a (9): [0, 3, 5, 6, 7, 8], b (4): [0, 3, 4, 5, 6, 7]
+idx: 6, delta: 4, matching: false, a (10): [2, 5, 6], b (3): [0, 1, 6, 8]
+idx: 6, delta: 5, matching: false, a (11): [4, 5, 6, 7], b (2): [0, 3, 5, 6, 7, 8]
+idx: 6, delta: 6, matching: false, a (12): [2, 3, 4, 6], b (1): [2, 5, 6]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 2, 3, 5, 6, 7], b (0): [4, 5, 6, 7]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 3, 4, 5, 6, 7], b (8): [0, 1, 6, 8]
+idx: 7, delta: 2, matching: false, a (9): [0, 3, 5, 6, 7, 8], b (6): [6, 8]
+idx: 7, delta: 3, matching: false, a (10): [2, 5, 6], b (5): [6, 8]
+idx: 7, delta: 4, matching: false, a (11): [4, 5, 6, 7], b (4): [0, 3, 4, 5, 6, 7]
+idx: 7, delta: 5, matching: false, a (12): [2, 3, 4, 6], b (3): [0, 1, 6, 8]
+idx: 7, delta: 6, matching: false, a (13): [0, 1, 2, 3, 5, 6, 7], b (2): [0, 3, 5, 6, 7, 8]
+idx: 7, delta: 7, matching: false, a (14): [0, 1, 2, 3, 5, 7], b (1): [2, 5, 6]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 6, 8], b (9): [0, 3, 5, 6, 7, 8]
+idx: 8, delta: 2, matching: false, a (10): [2, 5, 6], b (7): [0, 3, 4, 5, 6, 7]
+idx: 8, delta: 3, matching: false, a (11): [4, 5, 6, 7], b (6): [6, 8]
+idx: 8, delta: 4, matching: false, a (12): [2, 3, 4, 6], b (5): [6, 8]
+idx: 8, delta: 5, matching: false, a (13): [0, 1, 2, 3, 5, 6, 7], b (4): [0, 3, 4, 5, 6, 7]
+idx: 8, delta: 6, matching: false, a (14): [0, 1, 2, 3, 5, 7], b (3): [0, 1, 6, 8]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 3, 5, 6, 7, 8], b (10): [2, 5, 6]
+idx: 9, delta: 2, matching: false, a (11): [4, 5, 6, 7], b (8): [0, 1, 6, 8]
+idx: 9, delta: 3, matching: false, a (12): [2, 3, 4, 6], b (7): [0, 3, 4, 5, 6, 7]
+idx: 9, delta: 4, matching: false, a (13): [0, 1, 2, 3, 5, 6, 7], b (6): [6, 8]
+idx: 9, delta: 5, matching: false, a (14): [0, 1, 2, 3, 5, 7], b (5): [6, 8]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [2, 5, 6], b (11): [4, 5, 6, 7]
+idx: 10, delta: 2, matching: false, a (12): [2, 3, 4, 6], b (9): [0, 3, 5, 6, 7, 8]
+idx: 10, delta: 3, matching: false, a (13): [0, 1, 2, 3, 5, 6, 7], b (8): [0, 1, 6, 8]
+idx: 10, delta: 4, matching: false, a (14): [0, 1, 2, 3, 5, 7], b (7): [0, 3, 4, 5, 6, 7]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [4, 5, 6, 7], b (12): [2, 3, 4, 6]
+idx: 11, delta: 2, matching: false, a (13): [0, 1, 2, 3, 5, 6, 7], b (10): [2, 5, 6]
+idx: 11, delta: 3, matching: false, a (14): [0, 1, 2, 3, 5, 7], b (9): [0, 3, 5, 6, 7, 8]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [2, 3, 4, 6], b (13): [0, 1, 2, 3, 5, 6, 7]
+idx: 12, delta: 2, matching: false, a (14): [0, 1, 2, 3, 5, 7], b (11): [4, 5, 6, 7]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 1, 2, 3, 5, 6, 7], b (14): [0, 1, 2, 3, 5, 7]
+idx: 13, delta: 0 --- found smudge!
+idx: 13 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [2, 3, 4, 7, 8, 9, 13, 14], b (1): [3, 8, 13, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [3, 8, 13, 14], b (2): [1, 10, 12, 13, 14]
+idx: 1, delta: 2, matching: false, a (3): [2, 4, 7, 9, 12, 13, 14], b (0): [2, 3, 4, 7, 8, 9, 13, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 10, 12, 13, 14], b (3): [2, 4, 7, 9, 12, 13, 14]
+idx: 2, delta: 2, matching: false, a (4): [0, 4, 7, 11, 12], b (1): [3, 8, 13, 14]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 4, 7, 9, 10, 11, 13, 14], b (0): [2, 3, 4, 7, 8, 9, 13, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 4, 7, 9, 12, 13, 14], b (4): [0, 4, 7, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 4, 7, 9, 10, 11, 13, 14], b (2): [1, 10, 12, 13, 14]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13], b (1): [3, 8, 13, 14]
+idx: 3, delta: 4, matching: false, a (7): [0, 2, 4, 7, 9, 11, 13, 14], b (0): [2, 3, 4, 7, 8, 9, 13, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 4, 7, 11, 12], b (5): [0, 1, 2, 4, 7, 9, 10, 11, 13, 14]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13], b (3): [2, 4, 7, 9, 12, 13, 14]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 4, 7, 9, 11, 13, 14], b (2): [1, 10, 12, 13, 14]
+idx: 4, delta: 4, matching: false, a (8): [2, 3, 5, 6, 8, 9], b (1): [3, 8, 13, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 4, 7, 9, 10, 11, 13, 14], b (6): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 4, 7, 9, 11, 13, 14], b (4): [0, 4, 7, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [2, 3, 5, 6, 8, 9], b (3): [2, 4, 7, 9, 12, 13, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13], b (7): [0, 2, 4, 7, 9, 11, 13, 14]
+idx: 6, delta: 2, matching: false, a (8): [2, 3, 5, 6, 8, 9], b (5): [0, 1, 2, 4, 7, 9, 10, 11, 13, 14]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 2, 4, 7, 9, 11, 13, 14], b (8): [2, 3, 5, 6, 8, 9]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+..###..###...##
+...#....#....##
+.#........#.###
+..#.#..#.#..###
+#...#..#...##..
+###.#..#.###.##
+##############.
+#.#.#..#.#.#.##
+..##.##.##.....
+14 (vert: 14, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13], b (1): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16], b (2): [1, 12, 14, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [3, 4, 9, 10, 14, 15], b (0): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 12, 14, 15, 16], b (3): [3, 4, 9, 10, 14, 15]
+idx: 2, delta: 2, matching: false, a (4): [3, 4, 9, 10, 14, 15], b (1): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16]
+idx: 2, delta: 3, matching: false, a (5): [1, 12, 14, 15, 16], b (0): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [3, 4, 9, 10, 14, 15], b (4): [3, 4, 9, 10, 14, 15]
+idx: 3, delta: 2, matching: true, a (5): [1, 12, 14, 15, 16], b (2): [1, 12, 14, 15, 16]
+idx: 3, delta: 3, matching: true, a (6): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16], b (1): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16]
+idx: 3, delta: 4, matching: true, a (7): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13], b (0): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [3, 4, 9, 10, 14, 15], b (5): [1, 12, 14, 15, 16]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16], b (3): [3, 4, 9, 10, 14, 15]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13], b (2): [1, 12, 14, 15, 16]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15], b (1): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16]
+idx: 4, delta: 5, matching: false, a (9): [1, 5, 8, 9, 12], b (0): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 12, 14, 15, 16], b (6): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13], b (4): [3, 4, 9, 10, 14, 15]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15], b (3): [3, 4, 9, 10, 14, 15]
+idx: 5, delta: 4, matching: false, a (9): [1, 5, 8, 9, 12], b (2): [1, 12, 14, 15, 16]
+idx: 5, delta: 5, matching: false, a (10): [3, 4, 5, 8, 9, 10, 15, 16], b (1): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16]
+idx: 5, delta: 6, matching: false, a (11): [2, 4, 9, 11, 15, 16], b (0): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16], b (7): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15], b (5): [1, 12, 14, 15, 16]
+idx: 6, delta: 3, matching: false, a (9): [1, 5, 8, 9, 12], b (4): [3, 4, 9, 10, 14, 15]
+idx: 6, delta: 4, matching: false, a (10): [3, 4, 5, 8, 9, 10, 15, 16], b (3): [3, 4, 9, 10, 14, 15]
+idx: 6, delta: 5, matching: false, a (11): [2, 4, 9, 11, 15, 16], b (2): [1, 12, 14, 15, 16]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (1): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16], b (0): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13], b (8): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15]
+idx: 7, delta: 2, matching: false, a (9): [1, 5, 8, 9, 12], b (6): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16]
+idx: 7, delta: 3, matching: false, a (10): [3, 4, 5, 8, 9, 10, 15, 16], b (5): [1, 12, 14, 15, 16]
+idx: 7, delta: 4, matching: false, a (11): [2, 4, 9, 11, 15, 16], b (4): [3, 4, 9, 10, 14, 15]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (3): [3, 4, 9, 10, 14, 15]
+idx: 7, delta: 6, matching: false, a (13): [0, 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16], b (2): [1, 12, 14, 15, 16]
+idx: 7, delta: 7, matching: false, a (14): [0, 1, 2, 6, 7, 11, 12, 13, 14, 15], b (1): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15], b (9): [1, 5, 8, 9, 12]
+idx: 8, delta: 2, matching: false, a (10): [3, 4, 5, 8, 9, 10, 15, 16], b (7): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13]
+idx: 8, delta: 3, matching: false, a (11): [2, 4, 9, 11, 15, 16], b (6): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (5): [1, 12, 14, 15, 16]
+idx: 8, delta: 5, matching: false, a (13): [0, 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16], b (4): [3, 4, 9, 10, 14, 15]
+idx: 8, delta: 6, matching: false, a (14): [0, 1, 2, 6, 7, 11, 12, 13, 14, 15], b (3): [3, 4, 9, 10, 14, 15]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 5, 8, 9, 12], b (10): [3, 4, 5, 8, 9, 10, 15, 16]
+idx: 9, delta: 2, matching: false, a (11): [2, 4, 9, 11, 15, 16], b (8): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15]
+idx: 9, delta: 3, matching: false, a (12): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (7): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13]
+idx: 9, delta: 4, matching: false, a (13): [0, 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16], b (6): [0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16]
+idx: 9, delta: 5, matching: false, a (14): [0, 1, 2, 6, 7, 11, 12, 13, 14, 15], b (5): [1, 12, 14, 15, 16]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [3, 4, 5, 8, 9, 10, 15, 16], b (11): [2, 4, 9, 11, 15, 16]
+idx: 10, delta: 2, matching: false, a (12): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (9): [1, 5, 8, 9, 12]
+idx: 10, delta: 3, matching: false, a (13): [0, 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16], b (8): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15]
+idx: 10, delta: 4, matching: false, a (14): [0, 1, 2, 6, 7, 11, 12, 13, 14, 15], b (7): [0, 2, 3, 4, 6, 7, 9, 10, 11, 13]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [2, 4, 9, 11, 15, 16], b (12): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16]
+idx: 11, delta: 2, matching: false, a (13): [0, 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16], b (10): [3, 4, 5, 8, 9, 10, 15, 16]
+idx: 11, delta: 3, matching: false, a (14): [0, 1, 2, 6, 7, 11, 12, 13, 14, 15], b (9): [1, 5, 8, 9, 12]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (13): [0, 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16]
+idx: 12, delta: 2, matching: false, a (14): [0, 1, 2, 6, 7, 11, 12, 13, 14, 15], b (11): [2, 4, 9, 11, 15, 16]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16], b (14): [0, 1, 2, 6, 7, 11, 12, 13, 14, 15]
+idx: 13 --- EXITING WITH false
+idx: 14 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 6, 7, 8, 12, 13, 14], b (1): [1, 2, 5, 6, 8, 9, 12, 13, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 5, 6, 8, 9, 12, 13, 14], b (2): [0, 1, 6, 7, 11, 12, 13, 14]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 3, 4, 6, 7, 8, 10], b (0): [0, 1, 6, 7, 8, 12, 13, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 6, 7, 11, 12, 13, 14], b (3): [0, 1, 3, 4, 6, 7, 8, 10]
+idx: 2, delta: 2, matching: false, a (4): [0, 3, 4, 7, 8, 10, 11, 13], b (1): [1, 2, 5, 6, 8, 9, 12, 13, 14]
+idx: 2, delta: 3, matching: false, a (5): [1, 6, 8, 9, 10, 12, 13], b (0): [0, 1, 6, 7, 8, 12, 13, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 3, 4, 6, 7, 8, 10], b (4): [0, 3, 4, 7, 8, 10, 11, 13]
+idx: 3, delta: 2, matching: false, a (5): [1, 6, 8, 9, 10, 12, 13], b (2): [0, 1, 6, 7, 11, 12, 13, 14]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 6, 7, 8, 12, 13, 14], b (1): [1, 2, 5, 6, 8, 9, 12, 13, 14]
+idx: 3, delta: 4, matching: true, a (7): [0, 1, 6, 7, 8, 12, 13, 14], b (0): [0, 1, 6, 7, 8, 12, 13, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 3, 4, 7, 8, 10, 11, 13], b (5): [1, 6, 8, 9, 10, 12, 13]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 6, 7, 8, 12, 13, 14], b (3): [0, 1, 3, 4, 6, 7, 8, 10]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 6, 7, 8, 12, 13, 14], b (2): [0, 1, 6, 7, 11, 12, 13, 14]
+idx: 4, delta: 4, matching: false, a (8): [1, 6, 8, 9, 10, 12, 13], b (1): [1, 2, 5, 6, 8, 9, 12, 13, 14]
+idx: 4, delta: 5, matching: false, a (9): [0, 3, 4, 7, 8, 9, 10, 11, 13], b (0): [0, 1, 6, 7, 8, 12, 13, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 6, 8, 9, 10, 12, 13], b (6): [0, 1, 6, 7, 8, 12, 13, 14]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 6, 7, 8, 12, 13, 14], b (4): [0, 3, 4, 7, 8, 10, 11, 13]
+idx: 5, delta: 3, matching: false, a (8): [1, 6, 8, 9, 10, 12, 13], b (3): [0, 1, 3, 4, 6, 7, 8, 10]
+idx: 5, delta: 4, matching: false, a (9): [0, 3, 4, 7, 8, 9, 10, 11, 13], b (2): [0, 1, 6, 7, 11, 12, 13, 14]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 3, 4, 6, 7, 8, 10], b (1): [1, 2, 5, 6, 8, 9, 12, 13, 14]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 6, 7, 11, 12, 13, 14], b (0): [0, 1, 6, 7, 8, 12, 13, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: true, a (6): [0, 1, 6, 7, 8, 12, 13, 14], b (7): [0, 1, 6, 7, 8, 12, 13, 14]
+idx: 6, delta: 2, matching: true, a (8): [1, 6, 8, 9, 10, 12, 13], b (5): [1, 6, 8, 9, 10, 12, 13]
+idx: 6, delta: 3, matching: false, a (9): [0, 3, 4, 7, 8, 9, 10, 11, 13], b (4): [0, 3, 4, 7, 8, 10, 11, 13]
+idx: 6, delta: 3 --- found smudge!
+idx: 6, delta: 4, matching: true, a (10): [0, 1, 3, 4, 6, 7, 8, 10], b (3): [0, 1, 3, 4, 6, 7, 8, 10]
+idx: 6, delta: 5, matching: true, a (11): [0, 1, 6, 7, 11, 12, 13, 14], b (2): [0, 1, 6, 7, 11, 12, 13, 14]
+idx: 6, delta: 6, matching: true, a (12): [1, 2, 5, 6, 8, 9, 12, 13, 14], b (1): [1, 2, 5, 6, 8, 9, 12, 13, 14]
+idx: 6, delta: 7, matching: true, a (13): [0, 1, 6, 7, 8, 12, 13, 14], b (0): [0, 1, 6, 7, 8, 12, 13, 14]
+idx: 6 --- EXITING WITH true
+##....###...###
+.##..##.##..###
+##....##...####
+##.##.###.#....
+#..##..##.##.#.
+.#....#.###.##.
+##....###...###
+##....###...###
+.#....#.###.##.
+#..##..#####.#.
+##.##.###.#....
+##....##...####
+.##..##.##..###
+##....###...###
+..####..#...###
+.######.#.##.##
+.##..##...####.
+700 (vert: 0, horiz: 7)
+
+idx: 0, delta: 0, matching: false, a (0): [2, 5, 6, 9, 10], b (1): [0, 1, 3, 6, 9, 10, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 3, 6, 9, 10, 12], b (2): [2, 3, 12]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 3, 4, 5, 6, 9, 10, 11, 12], b (0): [2, 5, 6, 9, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 3, 12], b (3): [0, 1, 3, 4, 5, 6, 9, 10, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [3, 4, 5, 7, 8, 10, 11, 12], b (1): [0, 1, 3, 6, 9, 10, 12]
+idx: 2, delta: 3, matching: false, a (5): [2, 4, 6, 9, 11], b (0): [2, 5, 6, 9, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 3, 4, 5, 6, 9, 10, 11, 12], b (4): [3, 4, 5, 7, 8, 10, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [2, 4, 6, 9, 11], b (2): [2, 3, 12]
+idx: 3, delta: 3, matching: false, a (6): [2, 7, 8], b (1): [0, 1, 3, 6, 9, 10, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [3, 4, 5, 7, 8, 10, 11, 12], b (5): [2, 4, 6, 9, 11]
+idx: 4, delta: 2, matching: false, a (6): [2, 7, 8], b (3): [0, 1, 3, 4, 5, 6, 9, 10, 11, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 4, 6, 9, 11], b (6): [2, 7, 8]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+idx: 0, delta: 0, matching: true, a (0): [1, 3], b (1): [1, 3]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 3], b (2): [0, 2, 5, 6]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 3, 4], b (0): [1, 3]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 5, 6], b (3): [1, 2, 3, 4]
+idx: 2, delta: 2, matching: false, a (4): [3, 4, 5], b (1): [1, 3]
+idx: 2, delta: 3, matching: false, a (5): [0, 3, 4], b (0): [1, 3]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 3, 4], b (4): [3, 4, 5]
+idx: 3, delta: 2, matching: false, a (5): [0, 3, 4], b (2): [0, 2, 5, 6]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 3, 5], b (1): [1, 3]
+idx: 3, delta: 4, matching: false, a (7): [4, 6], b (0): [1, 3]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [3, 4, 5], b (5): [0, 3, 4]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 3, 5], b (3): [1, 2, 3, 4]
+idx: 4, delta: 3, matching: false, a (7): [4, 6], b (2): [0, 2, 5, 6]
+idx: 4, delta: 4, matching: false, a (8): [4, 6], b (1): [1, 3]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 3, 5], b (0): [1, 3]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 3, 4], b (6): [0, 1, 3, 5]
+idx: 5, delta: 2, matching: false, a (7): [4, 6], b (4): [3, 4, 5]
+idx: 5, delta: 3, matching: false, a (8): [4, 6], b (3): [1, 2, 3, 4]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 3, 5], b (2): [0, 2, 5, 6]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 3, 4], b (1): [1, 3]
+idx: 5, delta: 6, matching: false, a (11): [3, 4, 5], b (0): [1, 3]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 3, 5], b (7): [4, 6]
+idx: 6, delta: 2, matching: false, a (8): [4, 6], b (5): [0, 3, 4]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 3, 5], b (4): [3, 4, 5]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 3, 4], b (3): [1, 2, 3, 4]
+idx: 6, delta: 5, matching: false, a (11): [3, 4, 5], b (2): [0, 2, 5, 6]
+idx: 6, delta: 6, matching: false, a (12): [1, 2, 3, 4], b (1): [1, 3]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: true, a (7): [4, 6], b (8): [4, 6]
+idx: 7, delta: 2, matching: true, a (9): [0, 1, 3, 5], b (6): [0, 1, 3, 5]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 3, 4], b (5): [0, 3, 4]
+idx: 7, delta: 3 --- found smudge!
+idx: 7, delta: 4, matching: true, a (11): [3, 4, 5], b (4): [3, 4, 5]
+idx: 7, delta: 5, matching: true, a (12): [1, 2, 3, 4], b (3): [1, 2, 3, 4]
+idx: 7 --- EXITING WITH true
+.#.#...
+.#.#...
+#.#..##
+.####..
+...###.
+#..##..
+##.#.#.
+....#.#
+....#.#
+##.#.#.
+##.##..
+...###.
+.####..
+800 (vert: 0, horiz: 8)
+
+idx: 0, delta: 0, matching: true, a (0): [1, 2, 3, 5, 6], b (1): [1, 2, 3, 5, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 3, 5, 6], b (2): [0, 1, 3, 5]
+idx: 1, delta: 2, matching: false, a (3): [0, 3, 4, 5, 6], b (0): [1, 2, 3, 5, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 3, 5], b (3): [0, 3, 4, 5, 6]
+idx: 2, delta: 2, matching: false, a (4): [1, 6], b (1): [1, 2, 3, 5, 6]
+idx: 2, delta: 3, matching: false, a (5): [3, 5, 6], b (0): [1, 2, 3, 5, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 3, 4, 5, 6], b (4): [1, 6]
+idx: 3, delta: 2, matching: false, a (5): [3, 5, 6], b (2): [0, 1, 3, 5]
+idx: 3, delta: 3, matching: false, a (6): [3, 5, 6], b (1): [1, 2, 3, 5, 6]
+idx: 3, delta: 4, matching: false, a (7): [1, 6], b (0): [1, 2, 3, 5, 6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 6], b (5): [3, 5, 6]
+idx: 4, delta: 2, matching: false, a (6): [3, 5, 6], b (3): [0, 3, 4, 5, 6]
+idx: 4, delta: 3, matching: false, a (7): [1, 6], b (2): [0, 1, 3, 5]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 3, 4, 5, 6], b (1): [1, 2, 3, 5, 6]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 3, 5], b (0): [1, 2, 3, 5, 6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: true, a (5): [3, 5, 6], b (6): [3, 5, 6]
+idx: 5, delta: 2, matching: true, a (7): [1, 6], b (4): [1, 6]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 3, 4, 5, 6], b (3): [0, 3, 4, 5, 6]
+idx: 5, delta: 3 --- found smudge!
+idx: 5, delta: 4, matching: true, a (9): [0, 1, 3, 5], b (2): [0, 1, 3, 5]
+idx: 5, delta: 5, matching: true, a (10): [1, 2, 3, 5, 6], b (1): [1, 2, 3, 5, 6]
+idx: 5 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [2, 3, 8, 9], b (1): [0, 1, 2, 4, 7, 8, 9, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 4, 7, 8, 9, 10], b (2): [0, 1, 10]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 5, 6, 8, 9, 10], b (0): [2, 3, 8, 9]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 10], b (3): [0, 1, 2, 3, 5, 6, 8, 9, 10]
+idx: 2, delta: 2, matching: false, a (4): [3, 8], b (1): [0, 1, 2, 4, 7, 8, 9, 10]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 3, 5, 6, 8, 9, 10], b (0): [2, 3, 8, 9]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 3, 5, 6, 8, 9, 10], b (4): [3, 8]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 3, 5, 6, 8, 9, 10], b (2): [0, 1, 10]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 3, 4, 5, 6, 7, 8, 10], b (1): [0, 1, 2, 4, 7, 8, 9, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [3, 8], b (5): [0, 1, 2, 3, 5, 6, 8, 9, 10]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 3, 4, 5, 6, 7, 8, 10], b (3): [0, 1, 2, 3, 5, 6, 8, 9, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 3, 5, 6, 8, 9, 10], b (6): [0, 1, 3, 4, 5, 6, 7, 8, 10]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+..##....##.
+###.#..####
+##........#
+####.##.###
+...#....#..
+####.##.###
+##.######.#
+6 (vert: 6, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [3], b (1): [1, 3, 5, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 3, 5, 6], b (2): [0, 2]
+idx: 1, delta: 2, matching: false, a (3): [1, 3, 4, 6], b (0): [3]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2], b (3): [1, 3, 4, 6]
+idx: 2, delta: 2, matching: false, a (4): [2, 4, 5], b (1): [1, 3, 5, 6]
+idx: 2, delta: 3, matching: false, a (5): [3, 5, 6], b (0): [3]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 3, 4, 6], b (4): [2, 4, 5]
+idx: 3, delta: 2, matching: false, a (5): [3, 5, 6], b (2): [0, 2]
+idx: 3, delta: 3, matching: false, a (6): [3, 5, 6], b (1): [1, 3, 5, 6]
+idx: 3, delta: 3 --- found smudge!
+idx: 3, delta: 4, matching: false, a (7): [2, 4, 5], b (0): [3]
+idx: 3, delta: 4 --- found smudge twice!
+idx: 4, delta: 0, matching: false, a (4): [2, 4, 5], b (5): [3, 5, 6]
+idx: 4, delta: 2, matching: false, a (6): [3, 5, 6], b (3): [1, 3, 4, 6]
+idx: 4, delta: 3, matching: false, a (7): [2, 4, 5], b (2): [0, 2]
+idx: 4, delta: 4, matching: false, a (8): [1, 3, 6], b (1): [1, 3, 5, 6]
+idx: 4, delta: 4 --- found smudge!
+idx: 4, delta: 5, matching: false, a (9): [0, 2], b (0): [3]
+idx: 4, delta: 5 --- found smudge twice!
+idx: 5, delta: 0, matching: true, a (5): [3, 5, 6], b (6): [3, 5, 6]
+idx: 5, delta: 2, matching: true, a (7): [2, 4, 5], b (4): [2, 4, 5]
+idx: 5, delta: 3, matching: false, a (8): [1, 3, 6], b (3): [1, 3, 4, 6]
+idx: 5, delta: 3 --- found smudge!
+idx: 5, delta: 4, matching: true, a (9): [0, 2], b (2): [0, 2]
+idx: 5, delta: 5, matching: true, a (10): [1, 3, 5, 6], b (1): [1, 3, 5, 6]
+idx: 5, delta: 6, matching: true, a (11): [3], b (0): [3]
+idx: 5 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [2, 9, 14], b (1): [1, 3, 8, 10, 13, 15]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 3, 8, 10, 13, 15], b (2): [2, 4, 7, 9, 14, 16]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 3, 5, 6, 8, 10, 11, 12, 13, 15], b (0): [2, 9, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 4, 7, 9, 14, 16], b (3): [0, 1, 3, 5, 6, 8, 10, 11, 12, 13, 15]
+idx: 2, delta: 2, matching: false, a (4): [3, 4, 7, 16], b (1): [1, 3, 8, 10, 13, 15]
+idx: 2, delta: 3, matching: false, a (5): [1, 4, 5, 6, 7, 10, 13, 16], b (0): [2, 9, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 3, 5, 6, 8, 10, 11, 12, 13, 15], b (4): [3, 4, 7, 16]
+idx: 3, delta: 2, matching: false, a (5): [1, 4, 5, 6, 7, 10, 13, 16], b (2): [2, 4, 7, 9, 14, 16]
+idx: 3, delta: 3, matching: false, a (6): [1, 3, 5, 6, 8, 10, 13, 15], b (1): [1, 3, 8, 10, 13, 15]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [3, 4, 7, 16], b (5): [1, 4, 5, 6, 7, 10, 13, 16]
+idx: 4, delta: 2, matching: false, a (6): [1, 3, 5, 6, 8, 10, 13, 15], b (3): [0, 1, 3, 5, 6, 8, 10, 11, 12, 13, 15]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 4, 5, 6, 7, 10, 13, 16], b (6): [1, 3, 5, 6, 8, 10, 13, 15]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+..#......#....#..
+.#.#....#.#..#.#.
+..#.#..#.#....#.#
+##.#.##.#.####.#.
+...##..#........#
+.#..####..#..#..#
+.#.#.##.#.#..#.#.
+6 (vert: 6, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 4, 5, 8, 9, 10, 11, 14, 15, 16], b (1): [0, 1, 4, 5, 8, 9, 10, 11, 14, 15, 16]
+idx: 0, delta: 0 --- found smudge!
+idx: 0 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [1, 3, 6, 10], b (1): [0, 1, 5, 6, 7, 8, 9, 11]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 5, 6, 7, 8, 9, 11], b (2): [3, 7, 8, 10]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 5, 7, 10, 11], b (0): [1, 3, 6, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 7, 8, 10], b (3): [2, 3, 5, 7, 10, 11]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 5, 8, 9, 10, 11], b (1): [0, 1, 5, 6, 7, 8, 9, 11]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 3, 5, 6, 8, 11], b (0): [1, 3, 6, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 3, 5, 7, 10, 11], b (4): [0, 1, 5, 8, 9, 10, 11]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 3, 5, 6, 8, 11], b (2): [3, 7, 8, 10]
+idx: 3, delta: 3, matching: false, a (6): [3, 5, 7, 8, 9, 10], b (1): [0, 1, 5, 6, 7, 8, 9, 11]
+idx: 3, delta: 4, matching: false, a (7): [2, 3, 5, 8, 11], b (0): [1, 3, 6, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 5, 8, 9, 10, 11], b (5): [0, 1, 2, 3, 5, 6, 8, 11]
+idx: 4, delta: 2, matching: false, a (6): [3, 5, 7, 8, 9, 10], b (3): [2, 3, 5, 7, 10, 11]
+idx: 4, delta: 3, matching: false, a (7): [2, 3, 5, 8, 11], b (2): [3, 7, 8, 10]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 3, 4, 5, 6, 10, 12], b (1): [0, 1, 5, 6, 7, 8, 9, 11]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 3, 6, 10, 11, 12], b (0): [1, 3, 6, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 3, 5, 6, 8, 11], b (6): [3, 5, 7, 8, 9, 10]
+idx: 5, delta: 2, matching: false, a (7): [2, 3, 5, 8, 11], b (4): [0, 1, 5, 8, 9, 10, 11]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 3, 4, 5, 6, 10, 12], b (3): [2, 3, 5, 7, 10, 11]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 3, 6, 10, 11, 12], b (2): [3, 7, 8, 10]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12], b (1): [0, 1, 5, 6, 7, 8, 9, 11]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 4, 5, 9, 10, 12], b (0): [1, 3, 6, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [3, 5, 7, 8, 9, 10], b (7): [2, 3, 5, 8, 11]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 3, 4, 5, 6, 10, 12], b (5): [0, 1, 2, 3, 5, 6, 8, 11]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 3, 6, 10, 11, 12], b (4): [0, 1, 5, 8, 9, 10, 11]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12], b (3): [2, 3, 5, 7, 10, 11]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 4, 5, 9, 10, 12], b (2): [3, 7, 8, 10]
+idx: 6, delta: 6, matching: false, a (12): [4, 7, 9, 10, 12], b (1): [0, 1, 5, 6, 7, 8, 9, 11]
+idx: 6, delta: 7, matching: false, a (13): [4, 7, 9, 10, 12], b (0): [1, 3, 6, 10]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [2, 3, 5, 8, 11], b (8): [0, 1, 2, 3, 4, 5, 6, 10, 12]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 2, 3, 6, 10, 11, 12], b (6): [3, 5, 7, 8, 9, 10]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12], b (5): [0, 1, 2, 3, 5, 6, 8, 11]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 4, 5, 9, 10, 12], b (4): [0, 1, 5, 8, 9, 10, 11]
+idx: 7, delta: 5, matching: false, a (12): [4, 7, 9, 10, 12], b (3): [2, 3, 5, 7, 10, 11]
+idx: 7, delta: 6, matching: false, a (13): [4, 7, 9, 10, 12], b (2): [3, 7, 8, 10]
+idx: 7, delta: 7, matching: false, a (14): [0, 1, 4, 5, 9, 10, 12], b (1): [0, 1, 5, 6, 7, 8, 9, 11]
+idx: 7, delta: 8, matching: false, a (15): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12], b (0): [1, 3, 6, 10]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 2, 3, 4, 5, 6, 10, 12], b (9): [0, 1, 2, 3, 6, 10, 11, 12]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12], b (7): [2, 3, 5, 8, 11]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 4, 5, 9, 10, 12], b (6): [3, 5, 7, 8, 9, 10]
+idx: 8, delta: 4, matching: false, a (12): [4, 7, 9, 10, 12], b (5): [0, 1, 2, 3, 5, 6, 8, 11]
+idx: 8, delta: 5, matching: false, a (13): [4, 7, 9, 10, 12], b (4): [0, 1, 5, 8, 9, 10, 11]
+idx: 8, delta: 6, matching: false, a (14): [0, 1, 4, 5, 9, 10, 12], b (3): [2, 3, 5, 7, 10, 11]
+idx: 8, delta: 7, matching: false, a (15): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12], b (2): [3, 7, 8, 10]
+idx: 8, delta: 8, matching: false, a (16): [0, 1, 2, 3, 6, 10, 11, 12], b (1): [0, 1, 5, 6, 7, 8, 9, 11]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 2, 3, 6, 10, 11, 12], b (10): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 4, 5, 9, 10, 12], b (8): [0, 1, 2, 3, 4, 5, 6, 10, 12]
+idx: 9, delta: 3, matching: false, a (12): [4, 7, 9, 10, 12], b (7): [2, 3, 5, 8, 11]
+idx: 9, delta: 4, matching: false, a (13): [4, 7, 9, 10, 12], b (6): [3, 5, 7, 8, 9, 10]
+idx: 9, delta: 5, matching: false, a (14): [0, 1, 4, 5, 9, 10, 12], b (5): [0, 1, 2, 3, 5, 6, 8, 11]
+idx: 9, delta: 6, matching: false, a (15): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12], b (4): [0, 1, 5, 8, 9, 10, 11]
+idx: 9, delta: 7, matching: false, a (16): [0, 1, 2, 3, 6, 10, 11, 12], b (3): [2, 3, 5, 7, 10, 11]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12], b (11): [0, 1, 4, 5, 9, 10, 12]
+idx: 10, delta: 2, matching: false, a (12): [4, 7, 9, 10, 12], b (9): [0, 1, 2, 3, 6, 10, 11, 12]
+idx: 10, delta: 3, matching: false, a (13): [4, 7, 9, 10, 12], b (8): [0, 1, 2, 3, 4, 5, 6, 10, 12]
+idx: 10, delta: 4, matching: false, a (14): [0, 1, 4, 5, 9, 10, 12], b (7): [2, 3, 5, 8, 11]
+idx: 10, delta: 5, matching: false, a (15): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12], b (6): [3, 5, 7, 8, 9, 10]
+idx: 10, delta: 6, matching: false, a (16): [0, 1, 2, 3, 6, 10, 11, 12], b (5): [0, 1, 2, 3, 5, 6, 8, 11]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 4, 5, 9, 10, 12], b (12): [4, 7, 9, 10, 12]
+idx: 11, delta: 2, matching: false, a (13): [4, 7, 9, 10, 12], b (10): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12]
+idx: 11, delta: 3, matching: false, a (14): [0, 1, 4, 5, 9, 10, 12], b (9): [0, 1, 2, 3, 6, 10, 11, 12]
+idx: 11, delta: 4, matching: false, a (15): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12], b (8): [0, 1, 2, 3, 4, 5, 6, 10, 12]
+idx: 11, delta: 5, matching: false, a (16): [0, 1, 2, 3, 6, 10, 11, 12], b (7): [2, 3, 5, 8, 11]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: true, a (12): [4, 7, 9, 10, 12], b (13): [4, 7, 9, 10, 12]
+idx: 12, delta: 2, matching: true, a (14): [0, 1, 4, 5, 9, 10, 12], b (11): [0, 1, 4, 5, 9, 10, 12]
+idx: 12, delta: 3, matching: true, a (15): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12], b (10): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12]
+idx: 12, delta: 4, matching: true, a (16): [0, 1, 2, 3, 6, 10, 11, 12], b (9): [0, 1, 2, 3, 6, 10, 11, 12]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [4, 7, 9, 10, 12], b (14): [0, 1, 4, 5, 9, 10, 12]
+idx: 13, delta: 2, matching: false, a (15): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12], b (12): [4, 7, 9, 10, 12]
+idx: 13, delta: 3, matching: false, a (16): [0, 1, 2, 3, 6, 10, 11, 12], b (11): [0, 1, 4, 5, 9, 10, 12]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [0, 1, 4, 5, 9, 10, 12], b (15): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12]
+idx: 14, delta: 2, matching: false, a (16): [0, 1, 2, 3, 6, 10, 11, 12], b (13): [4, 7, 9, 10, 12]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: false, a (15): [0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 12], b (16): [0, 1, 2, 3, 6, 10, 11, 12]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+.#.#..#...#..
+##...#####.#.
+...#...##.#..
+..##.#.#..##.
+##...#..####.
+####.##.#..#.
+...#.#.####..
+..##.#..#..#.
+#######...#.#
+####..#...###
+####.######.#
+##..##...##.#
+....#..#.##.#
+....#..#.##.#
+##..##...##.#
+####.######.#
+####..#...###
+1 (vert: 1, horiz: 0)
+
+idx: 0, delta: 0, matching: true, a (0): [0, 3, 4, 6, 8, 9, 11, 12], b (1): [0, 3, 4, 6, 8, 9, 11, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 3, 4, 6, 8, 9, 11, 12], b (2): [1, 2, 3, 4, 5, 6, 8, 9, 10]
+idx: 1, delta: 2, matching: false, a (3): [1, 3, 5, 9, 10, 11, 12], b (0): [0, 3, 4, 6, 8, 9, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 2, 3, 4, 5, 6, 8, 9, 10], b (3): [1, 3, 5, 9, 10, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 4, 5, 6, 10, 11], b (1): [0, 3, 4, 6, 8, 9, 11, 12]
+idx: 2, delta: 3, matching: false, a (5): [0, 3, 7, 8, 9, 10, 11], b (0): [0, 3, 4, 6, 8, 9, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 3, 5, 9, 10, 11, 12], b (4): [0, 1, 4, 5, 6, 10, 11]
+idx: 3, delta: 2, matching: false, a (5): [0, 3, 7, 8, 9, 10, 11], b (2): [1, 2, 3, 4, 5, 6, 8, 9, 10]
+idx: 3, delta: 3, matching: false, a (6): [2, 3, 7, 8, 9, 10, 11, 12], b (1): [0, 3, 4, 6, 8, 9, 11, 12]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 4, 7, 8, 9, 11, 12], b (0): [0, 3, 4, 6, 8, 9, 11, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 4, 5, 6, 10, 11], b (5): [0, 3, 7, 8, 9, 10, 11]
+idx: 4, delta: 2, matching: false, a (6): [2, 3, 7, 8, 9, 10, 11, 12], b (3): [1, 3, 5, 9, 10, 11, 12]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 4, 7, 8, 9, 11, 12], b (2): [1, 2, 3, 4, 5, 6, 8, 9, 10]
+idx: 4, delta: 4, matching: false, a (8): [1, 3, 7, 10, 12], b (1): [0, 3, 4, 6, 8, 9, 11, 12]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 12], b (0): [0, 3, 4, 6, 8, 9, 11, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 3, 7, 8, 9, 10, 11], b (6): [2, 3, 7, 8, 9, 10, 11, 12]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 4, 7, 8, 9, 11, 12], b (4): [0, 1, 4, 5, 6, 10, 11]
+idx: 5, delta: 3, matching: false, a (8): [1, 3, 7, 10, 12], b (3): [1, 3, 5, 9, 10, 11, 12]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 12], b (2): [1, 2, 3, 4, 5, 6, 8, 9, 10]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 12], b (1): [0, 3, 4, 6, 8, 9, 11, 12]
+idx: 5, delta: 6, matching: false, a (11): [1, 3, 7, 10, 12], b (0): [0, 3, 4, 6, 8, 9, 11, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [2, 3, 7, 8, 9, 10, 11, 12], b (7): [0, 1, 4, 7, 8, 9, 11, 12]
+idx: 6, delta: 2, matching: false, a (8): [1, 3, 7, 10, 12], b (5): [0, 3, 7, 8, 9, 10, 11]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 12], b (4): [0, 1, 4, 5, 6, 10, 11]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 12], b (3): [1, 3, 5, 9, 10, 11, 12]
+idx: 6, delta: 5, matching: false, a (11): [1, 3, 7, 10, 12], b (2): [1, 2, 3, 4, 5, 6, 8, 9, 10]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 4, 7, 8, 9, 10, 11, 12], b (1): [0, 3, 4, 6, 8, 9, 11, 12]
+idx: 6, delta: 7, matching: false, a (13): [2, 3, 7, 8, 9, 10, 11, 12], b (0): [0, 3, 4, 6, 8, 9, 11, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 4, 7, 8, 9, 11, 12], b (8): [1, 3, 7, 10, 12]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 12], b (6): [2, 3, 7, 8, 9, 10, 11, 12]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 12], b (5): [0, 3, 7, 8, 9, 10, 11]
+idx: 7, delta: 4, matching: false, a (11): [1, 3, 7, 10, 12], b (4): [0, 1, 4, 5, 6, 10, 11]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 4, 7, 8, 9, 10, 11, 12], b (3): [1, 3, 5, 9, 10, 11, 12]
+idx: 7, delta: 6, matching: false, a (13): [2, 3, 7, 8, 9, 10, 11, 12], b (2): [1, 2, 3, 4, 5, 6, 8, 9, 10]
+idx: 7, delta: 7, matching: false, a (14): [0, 3, 7, 8, 9, 10, 11], b (1): [0, 3, 4, 6, 8, 9, 11, 12]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [1, 3, 7, 10, 12], b (9): [0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 12]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 12], b (7): [0, 1, 4, 7, 8, 9, 11, 12]
+idx: 8, delta: 3, matching: false, a (11): [1, 3, 7, 10, 12], b (6): [2, 3, 7, 8, 9, 10, 11, 12]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 4, 7, 8, 9, 10, 11, 12], b (5): [0, 3, 7, 8, 9, 10, 11]
+idx: 8, delta: 5, matching: false, a (13): [2, 3, 7, 8, 9, 10, 11, 12], b (4): [0, 1, 4, 5, 6, 10, 11]
+idx: 8, delta: 6, matching: false, a (14): [0, 3, 7, 8, 9, 10, 11], b (3): [1, 3, 5, 9, 10, 11, 12]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: true, a (9): [0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 12], b (10): [0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 12]
+idx: 9, delta: 2, matching: true, a (11): [1, 3, 7, 10, 12], b (8): [1, 3, 7, 10, 12]
+idx: 9, delta: 3, matching: false, a (12): [0, 1, 4, 7, 8, 9, 10, 11, 12], b (7): [0, 1, 4, 7, 8, 9, 11, 12]
+idx: 9, delta: 3 --- found smudge!
+idx: 9, delta: 4, matching: true, a (13): [2, 3, 7, 8, 9, 10, 11, 12], b (6): [2, 3, 7, 8, 9, 10, 11, 12]
+idx: 9, delta: 5, matching: true, a (14): [0, 3, 7, 8, 9, 10, 11], b (5): [0, 3, 7, 8, 9, 10, 11]
+idx: 9 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 4, 5, 7, 9, 10, 12, 14], b (1): [2, 3, 4, 7, 8, 9, 10, 11, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 3, 4, 7, 8, 9, 10, 11, 12], b (2): [2, 6, 9, 10, 13]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 13, 14], b (0): [0, 1, 4, 5, 7, 9, 10, 12, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 6, 9, 10, 13], b (3): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 13, 14]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 4, 7, 9, 10, 12], b (1): [2, 3, 4, 7, 8, 9, 10, 11, 12]
+idx: 2, delta: 3, matching: false, a (5): [2, 3, 4, 9, 10], b (0): [0, 1, 4, 5, 7, 9, 10, 12, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 13, 14], b (4): [0, 1, 2, 4, 7, 9, 10, 12]
+idx: 3, delta: 2, matching: false, a (5): [2, 3, 4, 9, 10], b (2): [2, 6, 9, 10, 13]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 4, 9, 10], b (1): [2, 3, 4, 7, 8, 9, 10, 11, 12]
+idx: 3, delta: 4, matching: false, a (7): [5, 6, 7, 8, 9, 10, 11, 12, 13, 14], b (0): [0, 1, 4, 5, 7, 9, 10, 12, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 4, 7, 9, 10, 12], b (5): [2, 3, 4, 9, 10]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 4, 9, 10], b (3): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 13, 14]
+idx: 4, delta: 3, matching: false, a (7): [5, 6, 7, 8, 9, 10, 11, 12, 13, 14], b (2): [2, 6, 9, 10, 13]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 5, 6, 7, 12, 13, 14], b (1): [2, 3, 4, 7, 8, 9, 10, 11, 12]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 3, 5, 6, 7, 9, 10, 12, 13, 14], b (0): [0, 1, 4, 5, 7, 9, 10, 12, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 3, 4, 9, 10], b (6): [0, 1, 2, 4, 9, 10]
+idx: 5, delta: 2, matching: false, a (7): [5, 6, 7, 8, 9, 10, 11, 12, 13, 14], b (4): [0, 1, 2, 4, 7, 9, 10, 12]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 5, 6, 7, 12, 13, 14], b (3): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 13, 14]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 3, 5, 6, 7, 9, 10, 12, 13, 14], b (2): [2, 6, 9, 10, 13]
+idx: 5, delta: 5, matching: false, a (10): [2, 3, 4, 5, 6, 8, 11, 12, 13, 14], b (1): [2, 3, 4, 7, 8, 9, 10, 11, 12]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14], b (0): [0, 1, 4, 5, 7, 9, 10, 12, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 4, 9, 10], b (7): [5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 5, 6, 7, 12, 13, 14], b (5): [2, 3, 4, 9, 10]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 3, 5, 6, 7, 9, 10, 12, 13, 14], b (4): [0, 1, 2, 4, 7, 9, 10, 12]
+idx: 6, delta: 4, matching: false, a (10): [2, 3, 4, 5, 6, 8, 11, 12, 13, 14], b (3): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 13, 14]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14], b (2): [2, 6, 9, 10, 13]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 3, 6, 7, 8, 9, 10, 11, 12, 13], b (1): [2, 3, 4, 7, 8, 9, 10, 11, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [5, 6, 7, 8, 9, 10, 11, 12, 13, 14], b (8): [0, 1, 2, 5, 6, 7, 12, 13, 14]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 2, 3, 5, 6, 7, 9, 10, 12, 13, 14], b (6): [0, 1, 2, 4, 9, 10]
+idx: 7, delta: 3, matching: false, a (10): [2, 3, 4, 5, 6, 8, 11, 12, 13, 14], b (5): [2, 3, 4, 9, 10]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14], b (4): [0, 1, 2, 4, 7, 9, 10, 12]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 3, 6, 7, 8, 9, 10, 11, 12, 13], b (3): [0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 13, 14]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 2, 5, 6, 7, 12, 13, 14], b (9): [0, 1, 2, 3, 5, 6, 7, 9, 10, 12, 13, 14]
+idx: 8, delta: 2, matching: false, a (10): [2, 3, 4, 5, 6, 8, 11, 12, 13, 14], b (7): [5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14], b (6): [0, 1, 2, 4, 9, 10]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 3, 6, 7, 8, 9, 10, 11, 12, 13], b (5): [2, 3, 4, 9, 10]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 2, 3, 5, 6, 7, 9, 10, 12, 13, 14], b (10): [2, 3, 4, 5, 6, 8, 11, 12, 13, 14]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14], b (8): [0, 1, 2, 5, 6, 7, 12, 13, 14]
+idx: 9, delta: 3, matching: false, a (12): [0, 1, 3, 6, 7, 8, 9, 10, 11, 12, 13], b (7): [5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [2, 3, 4, 5, 6, 8, 11, 12, 13, 14], b (11): [0, 1, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14]
+idx: 10, delta: 2, matching: false, a (12): [0, 1, 3, 6, 7, 8, 9, 10, 11, 12, 13], b (9): [0, 1, 2, 3, 5, 6, 7, 9, 10, 12, 13, 14]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14], b (12): [0, 1, 3, 6, 7, 8, 9, 10, 11, 12, 13]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+##..##.#.##.#.#
+..###..######..
+..#...#..##..#.
+####.##.####.##
+###.#..#.##.#..
+..###....##....
+###.#....##....
+.....##########
+###..###....###
+####.###.##.###
+..#####.#..####
+##.#####.##.###
+##.#..########.
+10 (vert: 10, horiz: 0)
+
+idx: 0, delta: 0, matching: true, a (0): [0, 1, 3, 4, 5, 6, 8, 10, 13, 15], b (1): [0, 1, 3, 4, 5, 6, 8, 10, 13, 15]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 3, 4, 5, 6, 8, 10, 13, 15], b (2): [1, 3, 4, 5, 6, 7, 9, 10, 13, 14, 16]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 3, 4, 7, 9, 10, 13, 14, 15, 16], b (0): [0, 1, 3, 4, 5, 6, 8, 10, 13, 15]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 3, 4, 5, 6, 7, 9, 10, 13, 14, 16], b (3): [0, 2, 3, 4, 7, 9, 10, 13, 14, 15, 16]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 3, 4, 7, 8, 9, 14, 15, 16], b (1): [0, 1, 3, 4, 5, 6, 8, 10, 13, 15]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 8, 10, 13, 15], b (0): [0, 1, 3, 4, 5, 6, 8, 10, 13, 15]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 3, 4, 7, 9, 10, 13, 14, 15, 16], b (4): [0, 1, 2, 3, 4, 7, 8, 9, 14, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 8, 10, 13, 15], b (2): [1, 3, 4, 5, 6, 7, 9, 10, 13, 14, 16]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 6, 8, 9, 11, 12, 14, 15], b (1): [0, 1, 3, 4, 5, 6, 8, 10, 13, 15]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 3, 4, 7, 8, 9, 14, 15, 16], b (5): [0, 2, 3, 8, 10, 13, 15]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 6, 8, 9, 11, 12, 14, 15], b (3): [0, 2, 3, 4, 7, 9, 10, 13, 14, 15, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 3, 8, 10, 13, 15], b (6): [0, 1, 2, 6, 8, 9, 11, 12, 14, 15]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 4, 5, 6], b (1): [0, 1, 2, 4, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 4, 6], b (2): [3, 4, 5, 6]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 4, 5], b (0): [0, 1, 3, 4, 5, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 4, 5, 6], b (3): [0, 1, 2, 3, 4, 5]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 3, 4], b (1): [0, 1, 2, 4, 6]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2], b (0): [0, 1, 3, 4, 5, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 3, 4, 5], b (4): [0, 1, 2, 3, 4]
+idx: 3, delta: 0 --- found smudge!
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2], b (2): [3, 4, 5, 6]
+idx: 3, delta: 2 --- found smudge twice!
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 3, 4], b (5): [0, 1, 2]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 6], b (3): [0, 1, 2, 3, 4, 5]
+idx: 4, delta: 3, matching: false, a (7): [2, 3, 4], b (2): [3, 4, 5, 6]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 4, 5, 6], b (1): [0, 1, 2, 4, 6]
+idx: 4, delta: 5, matching: false, a (9): [2, 3, 4, 6], b (0): [0, 1, 3, 4, 5, 6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2], b (6): [0, 1, 2, 6]
+idx: 5, delta: 0 --- found smudge!
+idx: 5, delta: 2, matching: false, a (7): [2, 3, 4], b (4): [0, 1, 2, 3, 4]
+idx: 5, delta: 2 --- found smudge twice!
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 6], b (7): [2, 3, 4]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 4, 5, 6], b (5): [0, 1, 2]
+idx: 6, delta: 3, matching: false, a (9): [2, 3, 4, 6], b (4): [0, 1, 2, 3, 4]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 2, 3, 5], b (3): [0, 1, 2, 3, 4, 5]
+idx: 6, delta: 4 --- found smudge!
+idx: 6, delta: 5, matching: false, a (11): [6], b (2): [3, 4, 5, 6]
+idx: 6, delta: 5 --- found smudge twice!
+idx: 7, delta: 0, matching: false, a (7): [2, 3, 4], b (8): [0, 1, 4, 5, 6]
+idx: 7, delta: 2, matching: false, a (9): [2, 3, 4, 6], b (6): [0, 1, 2, 6]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 2, 3, 5], b (5): [0, 1, 2]
+idx: 7, delta: 4, matching: false, a (11): [6], b (4): [0, 1, 2, 3, 4]
+idx: 7, delta: 5, matching: false, a (12): [6], b (3): [0, 1, 2, 3, 4, 5]
+idx: 7, delta: 6, matching: false, a (13): [0, 1, 2, 3, 5], b (2): [3, 4, 5, 6]
+idx: 7, delta: 7, matching: false, a (14): [2, 3, 4, 6], b (1): [0, 1, 2, 4, 6]
+idx: 7, delta: 8, matching: true, a (15): [0, 1, 3, 4, 5, 6], b (0): [0, 1, 3, 4, 5, 6]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 4, 5, 6], b (9): [2, 3, 4, 6]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 2, 3, 5], b (7): [2, 3, 4]
+idx: 8, delta: 3, matching: false, a (11): [6], b (6): [0, 1, 2, 6]
+idx: 8, delta: 4, matching: false, a (12): [6], b (5): [0, 1, 2]
+idx: 8, delta: 5, matching: false, a (13): [0, 1, 2, 3, 5], b (4): [0, 1, 2, 3, 4]
+idx: 8, delta: 6, matching: false, a (14): [2, 3, 4, 6], b (3): [0, 1, 2, 3, 4, 5]
+idx: 8, delta: 7, matching: false, a (15): [0, 1, 3, 4, 5, 6], b (2): [3, 4, 5, 6]
+idx: 8, delta: 8, matching: false, a (16): [2, 3, 4], b (1): [0, 1, 2, 4, 6]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [2, 3, 4, 6], b (10): [0, 1, 2, 3, 5]
+idx: 9, delta: 2, matching: false, a (11): [6], b (8): [0, 1, 4, 5, 6]
+idx: 9, delta: 3, matching: false, a (12): [6], b (7): [2, 3, 4]
+idx: 9, delta: 4, matching: false, a (13): [0, 1, 2, 3, 5], b (6): [0, 1, 2, 6]
+idx: 9, delta: 5, matching: false, a (14): [2, 3, 4, 6], b (5): [0, 1, 2]
+idx: 9, delta: 6, matching: false, a (15): [0, 1, 3, 4, 5, 6], b (4): [0, 1, 2, 3, 4]
+idx: 9, delta: 7, matching: false, a (16): [2, 3, 4], b (3): [0, 1, 2, 3, 4, 5]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 2, 3, 5], b (11): [6]
+idx: 10, delta: 2, matching: false, a (12): [6], b (9): [2, 3, 4, 6]
+idx: 10, delta: 3, matching: false, a (13): [0, 1, 2, 3, 5], b (8): [0, 1, 4, 5, 6]
+idx: 10, delta: 4, matching: false, a (14): [2, 3, 4, 6], b (7): [2, 3, 4]
+idx: 10, delta: 4 --- found smudge!
+idx: 10, delta: 5, matching: false, a (15): [0, 1, 3, 4, 5, 6], b (6): [0, 1, 2, 6]
+idx: 10, delta: 5 --- found smudge twice!
+idx: 11, delta: 0, matching: true, a (11): [6], b (12): [6]
+idx: 11, delta: 2, matching: true, a (13): [0, 1, 2, 3, 5], b (10): [0, 1, 2, 3, 5]
+idx: 11, delta: 3, matching: true, a (14): [2, 3, 4, 6], b (9): [2, 3, 4, 6]
+idx: 11, delta: 4, matching: false, a (15): [0, 1, 3, 4, 5, 6], b (8): [0, 1, 4, 5, 6]
+idx: 11, delta: 4 --- found smudge!
+idx: 11, delta: 5, matching: true, a (16): [2, 3, 4], b (7): [2, 3, 4]
+idx: 11 --- EXITING WITH true
+##.####
+###.#.#
+...####
+######.
+#####..
+###....
+###...#
+..###..
+##..###
+..###.#
+####.#.
+......#
+......#
+####.#.
+..###.#
+##.####
+..###..
+1200 (vert: 0, horiz: 12)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 6, 7, 8, 9, 13], b (1): [1, 4, 5, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: true, a (1): [1, 4, 5, 12], b (2): [1, 4, 5, 12]
+idx: 1, delta: 2, matching: true, a (3): [1, 2, 6, 7, 8, 9, 13], b (0): [1, 2, 6, 7, 8, 9, 13]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 4, 5, 12], b (3): [1, 2, 6, 7, 8, 9, 13]
+idx: 2, delta: 2, matching: false, a (4): [0, 4, 6, 7, 8, 11], b (1): [1, 4, 5, 12]
+idx: 2, delta: 3, matching: false, a (5): [6, 7, 8, 9, 11, 12, 13, 14], b (0): [1, 2, 6, 7, 8, 9, 13]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 6, 7, 8, 9, 13], b (4): [0, 4, 6, 7, 8, 11]
+idx: 3, delta: 2, matching: false, a (5): [6, 7, 8, 9, 11, 12, 13, 14], b (2): [1, 4, 5, 12]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 3, 5, 14], b (1): [1, 4, 5, 12]
+idx: 3, delta: 4, matching: false, a (7): [0, 5, 6, 9, 10, 12, 13], b (0): [1, 2, 6, 7, 8, 9, 13]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 4, 6, 7, 8, 11], b (5): [6, 7, 8, 9, 11, 12, 13, 14]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 3, 5, 14], b (3): [1, 2, 6, 7, 8, 9, 13]
+idx: 4, delta: 3, matching: false, a (7): [0, 5, 6, 9, 10, 12, 13], b (2): [1, 4, 5, 12]
+idx: 4, delta: 4, matching: false, a (8): [2, 3, 7, 9, 10, 13], b (1): [1, 4, 5, 12]
+idx: 4, delta: 5, matching: false, a (9): [2, 3, 7, 9, 10, 13], b (0): [1, 2, 6, 7, 8, 9, 13]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [6, 7, 8, 9, 11, 12, 13, 14], b (6): [0, 1, 3, 5, 14]
+idx: 5, delta: 2, matching: false, a (7): [0, 5, 6, 9, 10, 12, 13], b (4): [0, 4, 6, 7, 8, 11]
+idx: 5, delta: 3, matching: false, a (8): [2, 3, 7, 9, 10, 13], b (3): [1, 2, 6, 7, 8, 9, 13]
+idx: 5, delta: 4, matching: false, a (9): [2, 3, 7, 9, 10, 13], b (2): [1, 4, 5, 12]
+idx: 5, delta: 5, matching: false, a (10): [0, 5, 6, 9, 10, 12, 13], b (1): [1, 4, 5, 12]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 3, 5, 14], b (0): [1, 2, 6, 7, 8, 9, 13]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 3, 5, 14], b (7): [0, 5, 6, 9, 10, 12, 13]
+idx: 6, delta: 2, matching: false, a (8): [2, 3, 7, 9, 10, 13], b (5): [6, 7, 8, 9, 11, 12, 13, 14]
+idx: 6, delta: 3, matching: false, a (9): [2, 3, 7, 9, 10, 13], b (4): [0, 4, 6, 7, 8, 11]
+idx: 6, delta: 4, matching: false, a (10): [0, 5, 6, 9, 10, 12, 13], b (3): [1, 2, 6, 7, 8, 9, 13]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 3, 5, 14], b (2): [1, 4, 5, 12]
+idx: 6, delta: 6, matching: false, a (12): [6, 7, 8, 9, 11, 12, 13, 14], b (1): [1, 4, 5, 12]
+idx: 6, delta: 7, matching: false, a (13): [0, 4, 6, 8, 11], b (0): [1, 2, 6, 7, 8, 9, 13]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 5, 6, 9, 10, 12, 13], b (8): [2, 3, 7, 9, 10, 13]
+idx: 7, delta: 2, matching: false, a (9): [2, 3, 7, 9, 10, 13], b (6): [0, 1, 3, 5, 14]
+idx: 7, delta: 3, matching: false, a (10): [0, 5, 6, 9, 10, 12, 13], b (5): [6, 7, 8, 9, 11, 12, 13, 14]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 3, 5, 14], b (4): [0, 4, 6, 7, 8, 11]
+idx: 7, delta: 5, matching: false, a (12): [6, 7, 8, 9, 11, 12, 13, 14], b (3): [1, 2, 6, 7, 8, 9, 13]
+idx: 7, delta: 6, matching: false, a (13): [0, 4, 6, 8, 11], b (2): [1, 4, 5, 12]
+idx: 7, delta: 7, matching: false, a (14): [1, 2, 6, 7, 8, 9, 13], b (1): [1, 4, 5, 12]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: true, a (8): [2, 3, 7, 9, 10, 13], b (9): [2, 3, 7, 9, 10, 13]
+idx: 8, delta: 2, matching: true, a (10): [0, 5, 6, 9, 10, 12, 13], b (7): [0, 5, 6, 9, 10, 12, 13]
+idx: 8, delta: 3, matching: true, a (11): [0, 1, 3, 5, 14], b (6): [0, 1, 3, 5, 14]
+idx: 8, delta: 4, matching: true, a (12): [6, 7, 8, 9, 11, 12, 13, 14], b (5): [6, 7, 8, 9, 11, 12, 13, 14]
+idx: 8, delta: 5, matching: false, a (13): [0, 4, 6, 8, 11], b (4): [0, 4, 6, 7, 8, 11]
+idx: 8, delta: 5 --- found smudge!
+idx: 8, delta: 6, matching: true, a (14): [1, 2, 6, 7, 8, 9, 13], b (3): [1, 2, 6, 7, 8, 9, 13]
+idx: 8 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [4, 6, 7, 10, 11, 13], b (1): [0, 1, 2, 3, 6, 11, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 3, 6, 11, 14], b (2): [0, 3, 8, 9, 14]
+idx: 1, delta: 2, matching: false, a (3): [6, 8, 9, 11], b (0): [4, 6, 7, 10, 11, 13]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 8, 9, 14], b (3): [6, 8, 9, 11]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 4, 13], b (1): [0, 1, 2, 3, 6, 11, 14]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 6, 7, 10, 11], b (0): [4, 6, 7, 10, 11, 13]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [6, 8, 9, 11], b (4): [1, 2, 4, 13]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 6, 7, 10, 11], b (2): [0, 3, 8, 9, 14]
+idx: 3, delta: 3, matching: false, a (6): [0, 3, 4, 5, 7, 10, 12, 13, 14], b (1): [0, 1, 2, 3, 6, 11, 14]
+idx: 3, delta: 4, matching: false, a (7): [0, 3, 4, 5, 8, 9, 12, 14], b (0): [4, 6, 7, 10, 11, 13]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 4, 13], b (5): [1, 2, 6, 7, 10, 11]
+idx: 4, delta: 2, matching: false, a (6): [0, 3, 4, 5, 7, 10, 12, 13, 14], b (3): [6, 8, 9, 11]
+idx: 4, delta: 3, matching: false, a (7): [0, 3, 4, 5, 8, 9, 12, 14], b (2): [0, 3, 8, 9, 14]
+idx: 4, delta: 4, matching: false, a (8): [0, 3, 4, 5, 12, 13, 14], b (1): [0, 1, 2, 3, 6, 11, 14]
+idx: 4, delta: 5, matching: false, a (9): [0, 3, 5, 7, 8, 9, 10, 12, 14], b (0): [4, 6, 7, 10, 11, 13]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 6, 7, 10, 11], b (6): [0, 3, 4, 5, 7, 10, 12, 13, 14]
+idx: 5, delta: 2, matching: false, a (7): [0, 3, 4, 5, 8, 9, 12, 14], b (4): [1, 2, 4, 13]
+idx: 5, delta: 3, matching: false, a (8): [0, 3, 4, 5, 12, 13, 14], b (3): [6, 8, 9, 11]
+idx: 5, delta: 4, matching: false, a (9): [0, 3, 5, 7, 8, 9, 10, 12, 14], b (2): [0, 3, 8, 9, 14]
+idx: 5, delta: 5, matching: false, a (10): [7, 8, 9, 10], b (1): [0, 1, 2, 3, 6, 11, 14]
+idx: 5, delta: 6, matching: false, a (11): [4, 5, 12, 13], b (0): [4, 6, 7, 10, 11, 13]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 3, 4, 5, 7, 10, 12, 13, 14], b (7): [0, 3, 4, 5, 8, 9, 12, 14]
+idx: 6, delta: 2, matching: false, a (8): [0, 3, 4, 5, 12, 13, 14], b (5): [1, 2, 6, 7, 10, 11]
+idx: 6, delta: 3, matching: false, a (9): [0, 3, 5, 7, 8, 9, 10, 12, 14], b (4): [1, 2, 4, 13]
+idx: 6, delta: 4, matching: false, a (10): [7, 8, 9, 10], b (3): [6, 8, 9, 11]
+idx: 6, delta: 5, matching: false, a (11): [4, 5, 12, 13], b (2): [0, 3, 8, 9, 14]
+idx: 6, delta: 6, matching: false, a (12): [1, 2, 5, 7, 10, 12], b (1): [0, 1, 2, 3, 6, 11, 14]
+idx: 6, delta: 7, matching: false, a (13): [0, 3, 5, 7, 8, 9, 10, 12, 14], b (0): [4, 6, 7, 10, 11, 13]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 3, 4, 5, 8, 9, 12, 14], b (8): [0, 3, 4, 5, 12, 13, 14]
+idx: 7, delta: 2, matching: false, a (9): [0, 3, 5, 7, 8, 9, 10, 12, 14], b (6): [0, 3, 4, 5, 7, 10, 12, 13, 14]
+idx: 7, delta: 3, matching: false, a (10): [7, 8, 9, 10], b (5): [1, 2, 6, 7, 10, 11]
+idx: 7, delta: 4, matching: false, a (11): [4, 5, 12, 13], b (4): [1, 2, 4, 13]
+idx: 7, delta: 5, matching: false, a (12): [1, 2, 5, 7, 10, 12], b (3): [6, 8, 9, 11]
+idx: 7, delta: 6, matching: false, a (13): [0, 3, 5, 7, 8, 9, 10, 12, 14], b (2): [0, 3, 8, 9, 14]
+idx: 7, delta: 7, matching: false, a (14): [5, 6, 11, 12], b (1): [0, 1, 2, 3, 6, 11, 14]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 3, 4, 5, 12, 13, 14], b (9): [0, 3, 5, 7, 8, 9, 10, 12, 14]
+idx: 8, delta: 2, matching: false, a (10): [7, 8, 9, 10], b (7): [0, 3, 4, 5, 8, 9, 12, 14]
+idx: 8, delta: 3, matching: false, a (11): [4, 5, 12, 13], b (6): [0, 3, 4, 5, 7, 10, 12, 13, 14]
+idx: 8, delta: 4, matching: false, a (12): [1, 2, 5, 7, 10, 12], b (5): [1, 2, 6, 7, 10, 11]
+idx: 8, delta: 5, matching: false, a (13): [0, 3, 5, 7, 8, 9, 10, 12, 14], b (4): [1, 2, 4, 13]
+idx: 8, delta: 6, matching: false, a (14): [5, 6, 11, 12], b (3): [6, 8, 9, 11]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 3, 5, 7, 8, 9, 10, 12, 14], b (10): [7, 8, 9, 10]
+idx: 9, delta: 2, matching: false, a (11): [4, 5, 12, 13], b (8): [0, 3, 4, 5, 12, 13, 14]
+idx: 9, delta: 3, matching: false, a (12): [1, 2, 5, 7, 10, 12], b (7): [0, 3, 4, 5, 8, 9, 12, 14]
+idx: 9, delta: 4, matching: false, a (13): [0, 3, 5, 7, 8, 9, 10, 12, 14], b (6): [0, 3, 4, 5, 7, 10, 12, 13, 14]
+idx: 9, delta: 5, matching: false, a (14): [5, 6, 11, 12], b (5): [1, 2, 6, 7, 10, 11]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [7, 8, 9, 10], b (11): [4, 5, 12, 13]
+idx: 10, delta: 2, matching: false, a (12): [1, 2, 5, 7, 10, 12], b (9): [0, 3, 5, 7, 8, 9, 10, 12, 14]
+idx: 10, delta: 3, matching: false, a (13): [0, 3, 5, 7, 8, 9, 10, 12, 14], b (8): [0, 3, 4, 5, 12, 13, 14]
+idx: 10, delta: 4, matching: false, a (14): [5, 6, 11, 12], b (7): [0, 3, 4, 5, 8, 9, 12, 14]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [4, 5, 12, 13], b (12): [1, 2, 5, 7, 10, 12]
+idx: 11, delta: 2, matching: false, a (13): [0, 3, 5, 7, 8, 9, 10, 12, 14], b (10): [7, 8, 9, 10]
+idx: 11, delta: 3, matching: false, a (14): [5, 6, 11, 12], b (9): [0, 3, 5, 7, 8, 9, 10, 12, 14]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [1, 2, 5, 7, 10, 12], b (13): [0, 3, 5, 7, 8, 9, 10, 12, 14]
+idx: 12, delta: 2, matching: false, a (14): [5, 6, 11, 12], b (11): [4, 5, 12, 13]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 3, 5, 7, 8, 9, 10, 12, 14], b (14): [5, 6, 11, 12]
+idx: 13 --- EXITING WITH false
+idx: 14 --- EXITING WITH false
+....#.##..##.#.
+####..#....#..#
+#..#....##....#
+......#.##.#...
+.##.#........#.
+.##...##..##...
+#..###.#..#.###
+#..###..##..#.#
+#..###......###
+#..#.#.####.#.#
+.......####....
+....##......##.
+.##..#.#..#.#..
+#..#.#.####.#.#
+.....##....##..
+9 (vert: 9, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 3, 4, 5, 7], b (1): [0, 2, 4, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 4, 6], b (2): [4, 6, 8]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 4, 5], b (0): [1, 3, 4, 5, 7]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [4, 6, 8], b (3): [1, 2, 4, 5]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 4, 5, 6, 8], b (1): [0, 2, 4, 6]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 3, 4, 5, 6, 8], b (0): [1, 3, 4, 5, 7]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 4, 5], b (4): [1, 2, 3, 4, 5, 6, 8]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 3, 4, 5, 6, 8], b (2): [4, 6, 8]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 4, 5], b (1): [0, 2, 4, 6]
+idx: 3, delta: 4, matching: false, a (7): [4, 6, 8], b (0): [1, 3, 4, 5, 7]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: true, a (4): [1, 2, 3, 4, 5, 6, 8], b (5): [1, 2, 3, 4, 5, 6, 8]
+idx: 4, delta: 2, matching: true, a (6): [1, 2, 4, 5], b (3): [1, 2, 4, 5]
+idx: 4, delta: 3, matching: true, a (7): [4, 6, 8], b (2): [4, 6, 8]
+idx: 4, delta: 4, matching: true, a (8): [0, 2, 4, 6], b (1): [0, 2, 4, 6]
+idx: 4, delta: 5, matching: true, a (9): [1, 3, 4, 5, 7], b (0): [1, 3, 4, 5, 7]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 3, 4, 5, 6, 8], b (6): [1, 2, 4, 5]
+idx: 5, delta: 2, matching: false, a (7): [4, 6, 8], b (4): [1, 2, 3, 4, 5, 6, 8]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 4, 6], b (3): [1, 2, 4, 5]
+idx: 5, delta: 4, matching: false, a (9): [1, 3, 4, 5, 7], b (2): [4, 6, 8]
+idx: 5, delta: 5, matching: false, a (10): [0, 6], b (1): [0, 2, 4, 6]
+idx: 5, delta: 6, matching: false, a (11): [0, 2, 3], b (0): [1, 3, 4, 5, 7]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 4, 5], b (7): [4, 6, 8]
+idx: 6, delta: 2, matching: false, a (8): [0, 2, 4, 6], b (5): [1, 2, 3, 4, 5, 6, 8]
+idx: 6, delta: 3, matching: false, a (9): [1, 3, 4, 5, 7], b (4): [1, 2, 3, 4, 5, 6, 8]
+idx: 6, delta: 4, matching: false, a (10): [0, 6], b (3): [1, 2, 4, 5]
+idx: 6, delta: 5, matching: false, a (11): [0, 2, 3], b (2): [4, 6, 8]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 6, 8], b (1): [0, 2, 4, 6]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 3], b (0): [1, 3, 4, 5, 7]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [4, 6, 8], b (8): [0, 2, 4, 6]
+idx: 7, delta: 2, matching: false, a (9): [1, 3, 4, 5, 7], b (6): [1, 2, 4, 5]
+idx: 7, delta: 3, matching: false, a (10): [0, 6], b (5): [1, 2, 3, 4, 5, 6, 8]
+idx: 7, delta: 4, matching: false, a (11): [0, 2, 3], b (4): [1, 2, 3, 4, 5, 6, 8]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 6, 8], b (3): [1, 2, 4, 5]
+idx: 7, delta: 6, matching: false, a (13): [0, 1, 3], b (2): [4, 6, 8]
+idx: 7, delta: 7, matching: false, a (14): [2, 3, 5, 6, 7, 8], b (1): [0, 2, 4, 6]
+idx: 7, delta: 8, matching: false, a (15): [3, 5, 6, 7, 8], b (0): [1, 3, 4, 5, 7]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 2, 4, 6], b (9): [1, 3, 4, 5, 7]
+idx: 8, delta: 2, matching: false, a (10): [0, 6], b (7): [4, 6, 8]
+idx: 8, delta: 3, matching: false, a (11): [0, 2, 3], b (6): [1, 2, 4, 5]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 6, 8], b (5): [1, 2, 3, 4, 5, 6, 8]
+idx: 8, delta: 5, matching: false, a (13): [0, 1, 3], b (4): [1, 2, 3, 4, 5, 6, 8]
+idx: 8, delta: 6, matching: false, a (14): [2, 3, 5, 6, 7, 8], b (3): [1, 2, 4, 5]
+idx: 8, delta: 7, matching: false, a (15): [3, 5, 6, 7, 8], b (2): [4, 6, 8]
+idx: 8, delta: 8, matching: false, a (16): [0, 1, 3], b (1): [0, 2, 4, 6]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 3, 4, 5, 7], b (10): [0, 6]
+idx: 9, delta: 2, matching: false, a (11): [0, 2, 3], b (8): [0, 2, 4, 6]
+idx: 9, delta: 3, matching: false, a (12): [0, 1, 6, 8], b (7): [4, 6, 8]
+idx: 9, delta: 4, matching: false, a (13): [0, 1, 3], b (6): [1, 2, 4, 5]
+idx: 9, delta: 5, matching: false, a (14): [2, 3, 5, 6, 7, 8], b (5): [1, 2, 3, 4, 5, 6, 8]
+idx: 9, delta: 6, matching: false, a (15): [3, 5, 6, 7, 8], b (4): [1, 2, 3, 4, 5, 6, 8]
+idx: 9, delta: 7, matching: false, a (16): [0, 1, 3], b (3): [1, 2, 4, 5]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 6], b (11): [0, 2, 3]
+idx: 10, delta: 2, matching: false, a (12): [0, 1, 6, 8], b (9): [1, 3, 4, 5, 7]
+idx: 10, delta: 3, matching: false, a (13): [0, 1, 3], b (8): [0, 2, 4, 6]
+idx: 10, delta: 4, matching: false, a (14): [2, 3, 5, 6, 7, 8], b (7): [4, 6, 8]
+idx: 10, delta: 5, matching: false, a (15): [3, 5, 6, 7, 8], b (6): [1, 2, 4, 5]
+idx: 10, delta: 6, matching: false, a (16): [0, 1, 3], b (5): [1, 2, 3, 4, 5, 6, 8]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 2, 3], b (12): [0, 1, 6, 8]
+idx: 11, delta: 2, matching: false, a (13): [0, 1, 3], b (10): [0, 6]
+idx: 11, delta: 3, matching: false, a (14): [2, 3, 5, 6, 7, 8], b (9): [1, 3, 4, 5, 7]
+idx: 11, delta: 4, matching: false, a (15): [3, 5, 6, 7, 8], b (8): [0, 2, 4, 6]
+idx: 11, delta: 5, matching: false, a (16): [0, 1, 3], b (7): [4, 6, 8]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 1, 6, 8], b (13): [0, 1, 3]
+idx: 12, delta: 2, matching: false, a (14): [2, 3, 5, 6, 7, 8], b (11): [0, 2, 3]
+idx: 12, delta: 3, matching: false, a (15): [3, 5, 6, 7, 8], b (10): [0, 6]
+idx: 12, delta: 4, matching: false, a (16): [0, 1, 3], b (9): [1, 3, 4, 5, 7]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 1, 3], b (14): [2, 3, 5, 6, 7, 8]
+idx: 13, delta: 2, matching: false, a (15): [3, 5, 6, 7, 8], b (12): [0, 1, 6, 8]
+idx: 13, delta: 3, matching: false, a (16): [0, 1, 3], b (11): [0, 2, 3]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [2, 3, 5, 6, 7, 8], b (15): [3, 5, 6, 7, 8]
+idx: 14, delta: 0 --- found smudge!
+idx: 14, delta: 2, matching: true, a (16): [0, 1, 3], b (13): [0, 1, 3]
+idx: 14 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [1, 8, 10, 11, 12, 13, 16], b (1): [0, 3, 4, 5, 6, 9, 12, 13, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 3, 4, 5, 6, 9, 12, 13, 16], b (2): [1, 3, 4, 5, 6, 8, 11, 14]
+idx: 1, delta: 2, matching: false, a (3): [0, 4, 5, 9, 11, 13, 14, 15, 16], b (0): [1, 8, 10, 11, 12, 13, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 3, 4, 5, 6, 8, 11, 14], b (3): [0, 4, 5, 9, 11, 13, 14, 15, 16]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], b (1): [0, 3, 4, 5, 6, 9, 12, 13, 16]
+idx: 2, delta: 3, matching: false, a (5): [0, 3, 4, 5, 6, 9, 14, 15], b (0): [1, 8, 10, 11, 12, 13, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 4, 5, 9, 11, 13, 14, 15, 16], b (4): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+idx: 3, delta: 2, matching: false, a (5): [0, 3, 4, 5, 6, 9, 14, 15], b (2): [1, 3, 4, 5, 6, 8, 11, 14]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 4, 5, 7, 8, 10, 12, 14, 15], b (1): [0, 3, 4, 5, 6, 9, 12, 13, 16]
+idx: 3, delta: 4, matching: false, a (7): [0, 9, 14, 15], b (0): [1, 8, 10, 11, 12, 13, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], b (5): [0, 3, 4, 5, 6, 9, 14, 15]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 4, 5, 7, 8, 10, 12, 14, 15], b (3): [0, 4, 5, 9, 11, 13, 14, 15, 16]
+idx: 4, delta: 3, matching: false, a (7): [0, 9, 14, 15], b (2): [1, 3, 4, 5, 6, 8, 11, 14]
+idx: 4, delta: 4, matching: false, a (8): [2, 4, 5, 7, 12, 14, 15], b (1): [0, 3, 4, 5, 6, 9, 12, 13, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 3, 4, 5, 6, 9, 14, 15], b (6): [1, 2, 4, 5, 7, 8, 10, 12, 14, 15]
+idx: 5, delta: 2, matching: false, a (7): [0, 9, 14, 15], b (4): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+idx: 5, delta: 3, matching: false, a (8): [2, 4, 5, 7, 12, 14, 15], b (3): [0, 4, 5, 9, 11, 13, 14, 15, 16]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 4, 5, 7, 8, 10, 12, 14, 15], b (7): [0, 9, 14, 15]
+idx: 6, delta: 2, matching: false, a (8): [2, 4, 5, 7, 12, 14, 15], b (5): [0, 3, 4, 5, 6, 9, 14, 15]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 9, 14, 15], b (8): [2, 4, 5, 7, 12, 14, 15]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+.#......#.####..#
+#..####..#..##..#
+.#.####.#..#..#..
+#...##...#.#.####
+##########.......
+#..####..#....##.
+.##.##.##.#.#.##.
+#........#....##.
+..#.##.#....#.##.
+15 (vert: 15, horiz: 0)
+
+idx: 0, delta: 0, matching: true, a (0): [0, 2, 4, 7, 8, 11, 12, 13], b (1): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 4, 7, 8, 11, 12, 13], b (2): [0, 1, 2, 3, 4, 5, 8, 11, 12, 13]
+idx: 1, delta: 2, matching: false, a (3): [1, 6, 9, 10, 11, 13], b (0): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 4, 5, 8, 11, 12, 13], b (3): [1, 6, 9, 10, 11, 13]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 5, 8, 9, 14], b (1): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 5, 6, 7, 8, 10, 13, 14], b (0): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 6, 9, 10, 11, 13], b (4): [0, 1, 5, 8, 9, 14]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 5, 6, 7, 8, 10, 13, 14], b (2): [0, 1, 2, 3, 4, 5, 8, 11, 12, 13]
+idx: 3, delta: 3, matching: false, a (6): [4, 5, 9, 12, 13, 14], b (1): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 4, 7, 12, 13, 14], b (0): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 5, 8, 9, 14], b (5): [0, 1, 2, 5, 6, 7, 8, 10, 13, 14]
+idx: 4, delta: 2, matching: false, a (6): [4, 5, 9, 12, 13, 14], b (3): [1, 6, 9, 10, 11, 13]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 4, 7, 12, 13, 14], b (2): [0, 1, 2, 3, 4, 5, 8, 11, 12, 13]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 8, 13, 14], b (1): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 4, delta: 5, matching: false, a (9): [2, 5, 6, 8, 10, 11, 12], b (0): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 5, 6, 7, 8, 10, 13, 14], b (6): [4, 5, 9, 12, 13, 14]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 4, 7, 12, 13, 14], b (4): [0, 1, 5, 8, 9, 14]
+idx: 5, delta: 3, matching: false, a (8): [1, 2, 8, 13, 14], b (3): [1, 6, 9, 10, 11, 13]
+idx: 5, delta: 4, matching: false, a (9): [2, 5, 6, 8, 10, 11, 12], b (2): [0, 1, 2, 3, 4, 5, 8, 11, 12, 13]
+idx: 5, delta: 5, matching: false, a (10): [2, 5, 6, 8, 11, 12], b (1): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 5, delta: 6, matching: false, a (11): [1, 2, 8, 13, 14], b (0): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [4, 5, 9, 12, 13, 14], b (7): [0, 1, 4, 7, 12, 13, 14]
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 8, 13, 14], b (5): [0, 1, 2, 5, 6, 7, 8, 10, 13, 14]
+idx: 6, delta: 3, matching: false, a (9): [2, 5, 6, 8, 10, 11, 12], b (4): [0, 1, 5, 8, 9, 14]
+idx: 6, delta: 4, matching: false, a (10): [2, 5, 6, 8, 11, 12], b (3): [1, 6, 9, 10, 11, 13]
+idx: 6, delta: 5, matching: false, a (11): [1, 2, 8, 13, 14], b (2): [0, 1, 2, 3, 4, 5, 8, 11, 12, 13]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 4, 7, 12, 13, 14], b (1): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 6, delta: 7, matching: false, a (13): [4, 5, 9, 12, 13, 14], b (0): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 4, 7, 12, 13, 14], b (8): [1, 2, 8, 13, 14]
+idx: 7, delta: 2, matching: false, a (9): [2, 5, 6, 8, 10, 11, 12], b (6): [4, 5, 9, 12, 13, 14]
+idx: 7, delta: 3, matching: false, a (10): [2, 5, 6, 8, 11, 12], b (5): [0, 1, 2, 5, 6, 7, 8, 10, 13, 14]
+idx: 7, delta: 4, matching: false, a (11): [1, 2, 8, 13, 14], b (4): [0, 1, 5, 8, 9, 14]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 4, 7, 12, 13, 14], b (3): [1, 6, 9, 10, 11, 13]
+idx: 7, delta: 6, matching: false, a (13): [4, 5, 9, 12, 13, 14], b (2): [0, 1, 2, 3, 4, 5, 8, 11, 12, 13]
+idx: 7, delta: 7, matching: false, a (14): [0, 1, 2, 5, 6, 7, 8, 10, 13, 14], b (1): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 7, delta: 8, matching: false, a (15): [0, 1, 5, 8, 9, 14], b (0): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [1, 2, 8, 13, 14], b (9): [2, 5, 6, 8, 10, 11, 12]
+idx: 8, delta: 2, matching: false, a (10): [2, 5, 6, 8, 11, 12], b (7): [0, 1, 4, 7, 12, 13, 14]
+idx: 8, delta: 3, matching: false, a (11): [1, 2, 8, 13, 14], b (6): [4, 5, 9, 12, 13, 14]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 4, 7, 12, 13, 14], b (5): [0, 1, 2, 5, 6, 7, 8, 10, 13, 14]
+idx: 8, delta: 5, matching: false, a (13): [4, 5, 9, 12, 13, 14], b (4): [0, 1, 5, 8, 9, 14]
+idx: 8, delta: 6, matching: false, a (14): [0, 1, 2, 5, 6, 7, 8, 10, 13, 14], b (3): [1, 6, 9, 10, 11, 13]
+idx: 8, delta: 7, matching: false, a (15): [0, 1, 5, 8, 9, 14], b (2): [0, 1, 2, 3, 4, 5, 8, 11, 12, 13]
+idx: 8, delta: 8, matching: false, a (16): [1, 6, 9, 10, 11, 13], b (1): [0, 2, 4, 7, 8, 11, 12, 13]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [2, 5, 6, 8, 10, 11, 12], b (10): [2, 5, 6, 8, 11, 12]
+idx: 9, delta: 0 --- found smudge!
+idx: 9, delta: 2, matching: true, a (11): [1, 2, 8, 13, 14], b (8): [1, 2, 8, 13, 14]
+idx: 9, delta: 3, matching: true, a (12): [0, 1, 4, 7, 12, 13, 14], b (7): [0, 1, 4, 7, 12, 13, 14]
+idx: 9, delta: 4, matching: true, a (13): [4, 5, 9, 12, 13, 14], b (6): [4, 5, 9, 12, 13, 14]
+idx: 9, delta: 5, matching: true, a (14): [0, 1, 2, 5, 6, 7, 8, 10, 13, 14], b (5): [0, 1, 2, 5, 6, 7, 8, 10, 13, 14]
+idx: 9, delta: 6, matching: true, a (15): [0, 1, 5, 8, 9, 14], b (4): [0, 1, 5, 8, 9, 14]
+idx: 9, delta: 7, matching: true, a (16): [1, 6, 9, 10, 11, 13], b (3): [1, 6, 9, 10, 11, 13]
+idx: 9 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 4, 5, 7, 12, 14, 15], b (1): [2, 3, 4, 5, 7, 8, 11, 12, 14, 15, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 3, 4, 5, 7, 8, 11, 12, 14, 15, 16], b (2): [0, 1, 2, 5, 8, 9, 10, 11, 14]
+idx: 1, delta: 2, matching: false, a (3): [2], b (0): [0, 1, 2, 4, 5, 7, 12, 14, 15]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 5, 8, 9, 10, 11, 14], b (3): [2]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 6, 7, 12, 13], b (1): [2, 3, 4, 5, 7, 8, 11, 12, 14, 15, 16]
+idx: 2, delta: 3, matching: false, a (5): [2, 4, 5, 6, 9, 10, 13, 14, 15], b (0): [0, 1, 2, 4, 5, 7, 12, 14, 15]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2], b (4): [0, 1, 2, 6, 7, 12, 13]
+idx: 3, delta: 2, matching: false, a (5): [2, 4, 5, 6, 9, 10, 13, 14, 15], b (2): [0, 1, 2, 5, 8, 9, 10, 11, 14]
+idx: 3, delta: 3, matching: false, a (6): [3, 5, 9, 10, 14, 16], b (1): [2, 3, 4, 5, 7, 8, 11, 12, 14, 15, 16]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 5, 7, 12, 14], b (0): [0, 1, 2, 4, 5, 7, 12, 14, 15]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 6, 7, 12, 13], b (5): [2, 4, 5, 6, 9, 10, 13, 14, 15]
+idx: 4, delta: 2, matching: false, a (6): [3, 5, 9, 10, 14, 16], b (3): [2]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 5, 7, 12, 14], b (2): [0, 1, 2, 5, 8, 9, 10, 11, 14]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 4, 5, 8, 9, 10, 11, 14, 15], b (1): [2, 3, 4, 5, 7, 8, 11, 12, 14, 15, 16]
+idx: 4, delta: 5, matching: false, a (9): [3, 4, 6, 13, 15, 16], b (0): [0, 1, 2, 4, 5, 7, 12, 14, 15]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 4, 5, 6, 9, 10, 13, 14, 15], b (6): [3, 5, 9, 10, 14, 16]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 5, 7, 12, 14], b (4): [0, 1, 2, 6, 7, 12, 13]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 4, 5, 8, 9, 10, 11, 14, 15], b (3): [2]
+idx: 5, delta: 4, matching: false, a (9): [3, 4, 6, 13, 15, 16], b (2): [0, 1, 2, 5, 8, 9, 10, 11, 14]
+idx: 5, delta: 5, matching: false, a (10): [3, 5, 9, 14, 16], b (1): [2, 3, 4, 5, 7, 8, 11, 12, 14, 15, 16]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2, 3, 9, 10, 16], b (0): [0, 1, 2, 4, 5, 7, 12, 14, 15]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [3, 5, 9, 10, 14, 16], b (7): [0, 1, 5, 7, 12, 14]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 4, 5, 8, 9, 10, 11, 14, 15], b (5): [2, 4, 5, 6, 9, 10, 13, 14, 15]
+idx: 6, delta: 3, matching: false, a (9): [3, 4, 6, 13, 15, 16], b (4): [0, 1, 2, 6, 7, 12, 13]
+idx: 6, delta: 4, matching: false, a (10): [3, 5, 9, 14, 16], b (3): [2]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 2, 3, 9, 10, 16], b (2): [0, 1, 2, 5, 8, 9, 10, 11, 14]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 2, 6, 7, 9, 10, 12, 13], b (1): [2, 3, 4, 5, 7, 8, 11, 12, 14, 15, 16]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 2, 3, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (0): [0, 1, 2, 4, 5, 7, 12, 14, 15]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 5, 7, 12, 14], b (8): [0, 1, 2, 4, 5, 8, 9, 10, 11, 14, 15]
+idx: 7, delta: 2, matching: false, a (9): [3, 4, 6, 13, 15, 16], b (6): [3, 5, 9, 10, 14, 16]
+idx: 7, delta: 3, matching: false, a (10): [3, 5, 9, 14, 16], b (5): [2, 4, 5, 6, 9, 10, 13, 14, 15]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 2, 3, 9, 10, 16], b (4): [0, 1, 2, 6, 7, 12, 13]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 2, 6, 7, 9, 10, 12, 13], b (3): [2]
+idx: 7, delta: 6, matching: false, a (13): [0, 1, 2, 3, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (2): [0, 1, 2, 5, 8, 9, 10, 11, 14]
+idx: 7, delta: 7, matching: false, a (14): [4, 5, 6, 7, 8, 11, 12, 13, 14, 15], b (1): [2, 3, 4, 5, 7, 8, 11, 12, 14, 15, 16]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 2, 4, 5, 8, 9, 10, 11, 14, 15], b (9): [3, 4, 6, 13, 15, 16]
+idx: 8, delta: 2, matching: false, a (10): [3, 5, 9, 14, 16], b (7): [0, 1, 5, 7, 12, 14]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 2, 3, 9, 10, 16], b (6): [3, 5, 9, 10, 14, 16]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 2, 6, 7, 9, 10, 12, 13], b (5): [2, 4, 5, 6, 9, 10, 13, 14, 15]
+idx: 8, delta: 5, matching: false, a (13): [0, 1, 2, 3, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (4): [0, 1, 2, 6, 7, 12, 13]
+idx: 8, delta: 6, matching: false, a (14): [4, 5, 6, 7, 8, 11, 12, 13, 14, 15], b (3): [2]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [3, 4, 6, 13, 15, 16], b (10): [3, 5, 9, 14, 16]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 2, 3, 9, 10, 16], b (8): [0, 1, 2, 4, 5, 8, 9, 10, 11, 14, 15]
+idx: 9, delta: 3, matching: false, a (12): [0, 1, 2, 6, 7, 9, 10, 12, 13], b (7): [0, 1, 5, 7, 12, 14]
+idx: 9, delta: 4, matching: false, a (13): [0, 1, 2, 3, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (6): [3, 5, 9, 10, 14, 16]
+idx: 9, delta: 5, matching: false, a (14): [4, 5, 6, 7, 8, 11, 12, 13, 14, 15], b (5): [2, 4, 5, 6, 9, 10, 13, 14, 15]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [3, 5, 9, 14, 16], b (11): [0, 1, 2, 3, 9, 10, 16]
+idx: 10, delta: 2, matching: false, a (12): [0, 1, 2, 6, 7, 9, 10, 12, 13], b (9): [3, 4, 6, 13, 15, 16]
+idx: 10, delta: 3, matching: false, a (13): [0, 1, 2, 3, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (8): [0, 1, 2, 4, 5, 8, 9, 10, 11, 14, 15]
+idx: 10, delta: 4, matching: false, a (14): [4, 5, 6, 7, 8, 11, 12, 13, 14, 15], b (7): [0, 1, 5, 7, 12, 14]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 2, 3, 9, 10, 16], b (12): [0, 1, 2, 6, 7, 9, 10, 12, 13]
+idx: 11, delta: 2, matching: false, a (13): [0, 1, 2, 3, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (10): [3, 5, 9, 14, 16]
+idx: 11, delta: 3, matching: false, a (14): [4, 5, 6, 7, 8, 11, 12, 13, 14, 15], b (9): [3, 4, 6, 13, 15, 16]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 1, 2, 6, 7, 9, 10, 12, 13], b (13): [0, 1, 2, 3, 5, 6, 7, 8, 11, 12, 13, 14, 16]
+idx: 12, delta: 2, matching: false, a (14): [4, 5, 6, 7, 8, 11, 12, 13, 14, 15], b (11): [0, 1, 2, 3, 9, 10, 16]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 1, 2, 3, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (14): [4, 5, 6, 7, 8, 11, 12, 13, 14, 15]
+idx: 13 --- EXITING WITH false
+idx: 14 --- EXITING WITH false
+###.##.#....#.##.
+..####.##..##.###
+###..#..####..#..
+..#..............
+###...##....##...
+..#.###..##..###.
+...#.#...##...#.#
+##...#.#....#.#..
+###.##..####..##.
+...##.#......#.##
+...#.#...#....#.#
+####.....##.....#
+###...##.##.##...
+####.####..####.#
+....#####..#####.
+10 (vert: 10, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 5, 6, 7, 8], b (1): [1, 2, 5, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 5, 6], b (2): [0, 7, 8]
+idx: 1, delta: 2, matching: false, a (3): [0, 7, 8], b (0): [0, 1, 2, 5, 6, 7, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: true, a (2): [0, 7, 8], b (3): [0, 7, 8]
+idx: 2, delta: 2, matching: false, a (4): [3, 4], b (1): [1, 2, 5, 6]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 3, 4, 6, 7, 8], b (0): [0, 1, 2, 5, 6, 7, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 7, 8], b (4): [3, 4]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 3, 4, 6, 7, 8], b (2): [0, 7, 8]
+idx: 3, delta: 3, matching: false, a (6): [2, 4, 5], b (1): [1, 2, 5, 6]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 5, 6], b (0): [0, 1, 2, 5, 6, 7, 8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [3, 4], b (5): [0, 1, 3, 4, 6, 7, 8]
+idx: 4, delta: 2, matching: false, a (6): [2, 4, 5], b (3): [0, 7, 8]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 5, 6], b (2): [0, 7, 8]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 6, 7, 8], b (1): [1, 2, 5, 6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 3, 4, 6, 7, 8], b (6): [2, 4, 5]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 5, 6], b (4): [3, 4]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 6, 7, 8], b (3): [0, 7, 8]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [2, 4, 5], b (7): [1, 2, 5, 6]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 6, 7, 8], b (5): [0, 1, 3, 4, 6, 7, 8]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 5, 6], b (8): [0, 1, 6, 7, 8]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 3, 5, 8], b (1): [0, 1, 5, 7, 8]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 5, 7, 8], b (2): [0, 1, 6, 7]
+idx: 1, delta: 2, matching: false, a (3): [4, 5], b (0): [0, 2, 3, 5, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 6, 7], b (3): [4, 5]
+idx: 2, delta: 2, matching: false, a (4): [4, 5, 6], b (1): [0, 1, 5, 7, 8]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 6, 7], b (0): [0, 2, 3, 5, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [4, 5], b (4): [4, 5, 6]
+idx: 3, delta: 0 --- found smudge!
+idx: 3, delta: 2, matching: true, a (5): [0, 1, 6, 7], b (2): [0, 1, 6, 7]
+idx: 3, delta: 3, matching: true, a (6): [0, 1, 5, 7, 8], b (1): [0, 1, 5, 7, 8]
+idx: 3, delta: 4, matching: true, a (7): [0, 2, 3, 5, 8], b (0): [0, 2, 3, 5, 8]
+idx: 3 --- EXITING WITH true
+#.##.#..#
+##...#.##
+##....##.
+....##...
+....###..
+##....##.
+##...#.##
+#.##.#..#
+#.##.#..#
+400 (vert: 0, horiz: 4)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 5, 7, 8, 9, 14], b (1): [0, 1, 3, 8]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 3, 8], b (2): [0, 1, 3, 5, 9, 11, 12, 14]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 5, 9, 10, 13, 14], b (0): [1, 2, 5, 7, 8, 9, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 3, 5, 9, 11, 12, 14], b (3): [1, 2, 5, 9, 10, 13, 14]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 4, 6, 11, 12], b (1): [0, 1, 3, 8]
+idx: 2, delta: 3, matching: false, a (5): [3, 6, 7, 9, 11, 12, 14], b (0): [1, 2, 5, 7, 8, 9, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 5, 9, 10, 13, 14], b (4): [0, 1, 3, 4, 6, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [3, 6, 7, 9, 11, 12, 14], b (2): [0, 1, 3, 5, 9, 11, 12, 14]
+idx: 3, delta: 3, matching: false, a (6): [1, 3, 5, 6, 7, 8, 11, 12], b (1): [0, 1, 3, 8]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 4, 5, 7, 10, 11, 12, 13], b (0): [1, 2, 5, 7, 8, 9, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3, 4, 6, 11, 12], b (5): [3, 6, 7, 9, 11, 12, 14]
+idx: 4, delta: 2, matching: false, a (6): [1, 3, 5, 6, 7, 8, 11, 12], b (3): [1, 2, 5, 9, 10, 13, 14]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 4, 5, 7, 10, 11, 12, 13], b (2): [0, 1, 3, 5, 9, 11, 12, 14]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 3, 4, 5, 7, 10, 11, 12, 13], b (1): [0, 1, 3, 8]
+idx: 4, delta: 5, matching: false, a (9): [1, 3, 5, 6, 7, 8, 11, 12], b (0): [1, 2, 5, 7, 8, 9, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [3, 6, 7, 9, 11, 12, 14], b (6): [1, 3, 5, 6, 7, 8, 11, 12]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 4, 5, 7, 10, 11, 12, 13], b (4): [0, 1, 3, 4, 6, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [1, 2, 3, 4, 5, 7, 10, 11, 12, 13], b (3): [1, 2, 5, 9, 10, 13, 14]
+idx: 5, delta: 4, matching: false, a (9): [1, 3, 5, 6, 7, 8, 11, 12], b (2): [0, 1, 3, 5, 9, 11, 12, 14]
+idx: 5, delta: 5, matching: false, a (10): [3, 6, 7, 9, 11, 12, 14], b (1): [0, 1, 3, 8]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 3, 4, 6, 11, 12], b (0): [1, 2, 5, 7, 8, 9, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 3, 5, 6, 7, 8, 11, 12], b (7): [1, 2, 4, 5, 7, 10, 11, 12, 13]
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 3, 4, 5, 7, 10, 11, 12, 13], b (5): [3, 6, 7, 9, 11, 12, 14]
+idx: 6, delta: 3, matching: false, a (9): [1, 3, 5, 6, 7, 8, 11, 12], b (4): [0, 1, 3, 4, 6, 11, 12]
+idx: 6, delta: 4, matching: false, a (10): [3, 6, 7, 9, 11, 12, 14], b (3): [1, 2, 5, 9, 10, 13, 14]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 3, 4, 6, 11, 12], b (2): [0, 1, 3, 5, 9, 11, 12, 14]
+idx: 6, delta: 6, matching: false, a (12): [1, 2, 5, 9, 10, 13, 14], b (1): [0, 1, 3, 8]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 4, 5, 7, 10, 11, 12, 13], b (8): [1, 2, 3, 4, 5, 7, 10, 11, 12, 13]
+idx: 7, delta: 0 --- found smudge!
+idx: 7, delta: 2, matching: true, a (9): [1, 3, 5, 6, 7, 8, 11, 12], b (6): [1, 3, 5, 6, 7, 8, 11, 12]
+idx: 7, delta: 3, matching: true, a (10): [3, 6, 7, 9, 11, 12, 14], b (5): [3, 6, 7, 9, 11, 12, 14]
+idx: 7, delta: 4, matching: true, a (11): [0, 1, 3, 4, 6, 11, 12], b (4): [0, 1, 3, 4, 6, 11, 12]
+idx: 7, delta: 5, matching: true, a (12): [1, 2, 5, 9, 10, 13, 14], b (3): [1, 2, 5, 9, 10, 13, 14]
+idx: 7 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 4, 11], b (1): [0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 12], b (2): [0, 3, 7, 8, 12]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 4, 5, 6, 8, 9, 10, 11], b (0): [1, 2, 4, 11]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 7, 8, 12], b (3): [1, 2, 4, 5, 6, 8, 9, 10, 11]
+idx: 2, delta: 2, matching: false, a (4): [4, 7, 8, 11], b (1): [0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 12]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 6, 7, 8, 9, 12], b (0): [1, 2, 4, 11]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 4, 5, 6, 8, 9, 10, 11], b (4): [4, 7, 8, 11]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 6, 7, 8, 9, 12], b (2): [0, 3, 7, 8, 12]
+idx: 3, delta: 3, matching: false, a (6): [4, 5, 6, 9, 10, 11], b (1): [0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 12]
+idx: 3, delta: 4, matching: false, a (7): [0, 5, 6, 7, 8, 9, 10], b (0): [1, 2, 4, 11]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [4, 7, 8, 11], b (5): [0, 2, 3, 6, 7, 8, 9, 12]
+idx: 4, delta: 2, matching: false, a (6): [4, 5, 6, 9, 10, 11], b (3): [1, 2, 4, 5, 6, 8, 9, 10, 11]
+idx: 4, delta: 3, matching: false, a (7): [0, 5, 6, 7, 8, 9, 10], b (2): [0, 3, 7, 8, 12]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 6, 9], b (1): [0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 12]
+idx: 4, delta: 5, matching: false, a (9): [0, 2, 3, 5, 10, 12], b (0): [1, 2, 4, 11]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 3, 6, 7, 8, 9, 12], b (6): [4, 5, 6, 9, 10, 11]
+idx: 5, delta: 2, matching: false, a (7): [0, 5, 6, 7, 8, 9, 10], b (4): [4, 7, 8, 11]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 6, 9], b (3): [1, 2, 4, 5, 6, 8, 9, 10, 11]
+idx: 5, delta: 4, matching: false, a (9): [0, 2, 3, 5, 10, 12], b (2): [0, 3, 7, 8, 12]
+idx: 5, delta: 5, matching: false, a (10): [3, 7, 8, 12], b (1): [0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 12]
+idx: 5, delta: 6, matching: false, a (11): [2, 4, 5, 6, 7, 8, 9, 10, 11], b (0): [1, 2, 4, 11]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [4, 5, 6, 9, 10, 11], b (7): [0, 5, 6, 7, 8, 9, 10]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 6, 9], b (5): [0, 2, 3, 6, 7, 8, 9, 12]
+idx: 6, delta: 3, matching: false, a (9): [0, 2, 3, 5, 10, 12], b (4): [4, 7, 8, 11]
+idx: 6, delta: 4, matching: false, a (10): [3, 7, 8, 12], b (3): [1, 2, 4, 5, 6, 8, 9, 10, 11]
+idx: 6, delta: 5, matching: false, a (11): [2, 4, 5, 6, 7, 8, 9, 10, 11], b (2): [0, 3, 7, 8, 12]
+idx: 6, delta: 6, matching: false, a (12): [2, 4, 5, 6, 7, 8, 9, 10, 11], b (1): [0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 12]
+idx: 6, delta: 7, matching: false, a (13): [3, 7, 8, 12], b (0): [1, 2, 4, 11]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 5, 6, 7, 8, 9, 10], b (8): [0, 1, 6, 9]
+idx: 7, delta: 2, matching: false, a (9): [0, 2, 3, 5, 10, 12], b (6): [4, 5, 6, 9, 10, 11]
+idx: 7, delta: 3, matching: false, a (10): [3, 7, 8, 12], b (5): [0, 2, 3, 6, 7, 8, 9, 12]
+idx: 7, delta: 4, matching: false, a (11): [2, 4, 5, 6, 7, 8, 9, 10, 11], b (4): [4, 7, 8, 11]
+idx: 7, delta: 5, matching: false, a (12): [2, 4, 5, 6, 7, 8, 9, 10, 11], b (3): [1, 2, 4, 5, 6, 8, 9, 10, 11]
+idx: 7, delta: 6, matching: false, a (13): [3, 7, 8, 12], b (2): [0, 3, 7, 8, 12]
+idx: 7, delta: 6 --- found smudge!
+idx: 7, delta: 7, matching: false, a (14): [0, 2, 3, 5, 10, 12], b (1): [0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 12]
+idx: 7, delta: 7 --- found smudge twice!
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 6, 9], b (9): [0, 2, 3, 5, 10, 12]
+idx: 8, delta: 2, matching: false, a (10): [3, 7, 8, 12], b (7): [0, 5, 6, 7, 8, 9, 10]
+idx: 8, delta: 3, matching: false, a (11): [2, 4, 5, 6, 7, 8, 9, 10, 11], b (6): [4, 5, 6, 9, 10, 11]
+idx: 8, delta: 4, matching: false, a (12): [2, 4, 5, 6, 7, 8, 9, 10, 11], b (5): [0, 2, 3, 6, 7, 8, 9, 12]
+idx: 8, delta: 5, matching: false, a (13): [3, 7, 8, 12], b (4): [4, 7, 8, 11]
+idx: 8, delta: 6, matching: false, a (14): [0, 2, 3, 5, 10, 12], b (3): [1, 2, 4, 5, 6, 8, 9, 10, 11]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 2, 3, 5, 10, 12], b (10): [3, 7, 8, 12]
+idx: 9, delta: 2, matching: false, a (11): [2, 4, 5, 6, 7, 8, 9, 10, 11], b (8): [0, 1, 6, 9]
+idx: 9, delta: 3, matching: false, a (12): [2, 4, 5, 6, 7, 8, 9, 10, 11], b (7): [0, 5, 6, 7, 8, 9, 10]
+idx: 9, delta: 4, matching: false, a (13): [3, 7, 8, 12], b (6): [4, 5, 6, 9, 10, 11]
+idx: 9, delta: 5, matching: false, a (14): [0, 2, 3, 5, 10, 12], b (5): [0, 2, 3, 6, 7, 8, 9, 12]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [3, 7, 8, 12], b (11): [2, 4, 5, 6, 7, 8, 9, 10, 11]
+idx: 10, delta: 2, matching: false, a (12): [2, 4, 5, 6, 7, 8, 9, 10, 11], b (9): [0, 2, 3, 5, 10, 12]
+idx: 10, delta: 3, matching: false, a (13): [3, 7, 8, 12], b (8): [0, 1, 6, 9]
+idx: 10, delta: 4, matching: false, a (14): [0, 2, 3, 5, 10, 12], b (7): [0, 5, 6, 7, 8, 9, 10]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: true, a (11): [2, 4, 5, 6, 7, 8, 9, 10, 11], b (12): [2, 4, 5, 6, 7, 8, 9, 10, 11]
+idx: 11, delta: 2, matching: true, a (13): [3, 7, 8, 12], b (10): [3, 7, 8, 12]
+idx: 11, delta: 3, matching: true, a (14): [0, 2, 3, 5, 10, 12], b (9): [0, 2, 3, 5, 10, 12]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [2, 4, 5, 6, 7, 8, 9, 10, 11], b (13): [3, 7, 8, 12]
+idx: 12, delta: 2, matching: false, a (14): [0, 2, 3, 5, 10, 12], b (11): [2, 4, 5, 6, 7, 8, 9, 10, 11]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [3, 7, 8, 12], b (14): [0, 2, 3, 5, 10, 12]
+idx: 13 --- EXITING WITH false
+idx: 14 --- EXITING WITH false
+.##.#......#.
+#####.####.##
+#..#...##...#
+.##.###.####.
+....#..##..#.
+#.##..####..#
+....###..###.
+#....######..
+##....#..#...
+#.##.#....#.#
+...#...##...#
+..#.########.
+..#.########.
+...#...##...#
+#.##.#....#.#
+8 (vert: 8, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [2, 3, 7, 9, 12], b (1): [0, 1, 5, 6, 7]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 5, 6, 7], b (2): [2, 5, 8, 10, 11]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 4, 6, 9, 10, 11, 12], b (0): [2, 3, 7, 9, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 5, 8, 10, 11], b (3): [0, 1, 4, 6, 9, 10, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [2, 4, 7, 10, 11], b (1): [0, 1, 5, 6, 7]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12], b (0): [2, 3, 7, 9, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 4, 6, 9, 10, 11, 12], b (4): [2, 4, 7, 10, 11]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12], b (2): [2, 5, 8, 10, 11]
+idx: 3, delta: 3, matching: false, a (6): [2, 5, 6, 8, 9, 10, 11], b (1): [0, 1, 5, 6, 7]
+idx: 3, delta: 4, matching: false, a (7): [3, 4, 5, 8, 9, 10, 11, 12], b (0): [2, 3, 7, 9, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 4, 7, 10, 11], b (5): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12]
+idx: 4, delta: 2, matching: false, a (6): [2, 5, 6, 8, 9, 10, 11], b (3): [0, 1, 4, 6, 9, 10, 11, 12]
+idx: 4, delta: 3, matching: false, a (7): [3, 4, 5, 8, 9, 10, 11, 12], b (2): [2, 5, 8, 10, 11]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 3, 6, 7, 8, 9, 12], b (1): [0, 1, 5, 6, 7]
+idx: 4, delta: 5, matching: false, a (9): [3, 4, 5, 8, 10, 11], b (0): [2, 3, 7, 9, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12], b (6): [2, 5, 6, 8, 9, 10, 11]
+idx: 5, delta: 2, matching: false, a (7): [3, 4, 5, 8, 9, 10, 11, 12], b (4): [2, 4, 7, 10, 11]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 3, 6, 7, 8, 9, 12], b (3): [0, 1, 4, 6, 9, 10, 11, 12]
+idx: 5, delta: 4, matching: false, a (9): [3, 4, 5, 8, 10, 11], b (2): [2, 5, 8, 10, 11]
+idx: 5, delta: 5, matching: false, a (10): [6, 7, 8, 9, 12], b (1): [0, 1, 5, 6, 7]
+idx: 5, delta: 6, matching: false, a (11): [5, 6, 10, 11], b (0): [2, 3, 7, 9, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [2, 5, 6, 8, 9, 10, 11], b (7): [3, 4, 5, 8, 9, 10, 11, 12]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 3, 6, 7, 8, 9, 12], b (5): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12]
+idx: 6, delta: 3, matching: false, a (9): [3, 4, 5, 8, 10, 11], b (4): [2, 4, 7, 10, 11]
+idx: 6, delta: 4, matching: false, a (10): [6, 7, 8, 9, 12], b (3): [0, 1, 4, 6, 9, 10, 11, 12]
+idx: 6, delta: 5, matching: false, a (11): [5, 6, 10, 11], b (2): [2, 5, 8, 10, 11]
+idx: 6, delta: 6, matching: false, a (12): [3, 4, 5, 6, 7, 8, 10, 11], b (1): [0, 1, 5, 6, 7]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [3, 4, 5, 8, 9, 10, 11, 12], b (8): [0, 1, 2, 3, 6, 7, 8, 9, 12]
+idx: 7, delta: 2, matching: false, a (9): [3, 4, 5, 8, 10, 11], b (6): [2, 5, 6, 8, 9, 10, 11]
+idx: 7, delta: 3, matching: false, a (10): [6, 7, 8, 9, 12], b (5): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12]
+idx: 7, delta: 4, matching: false, a (11): [5, 6, 10, 11], b (4): [2, 4, 7, 10, 11]
+idx: 7, delta: 5, matching: false, a (12): [3, 4, 5, 6, 7, 8, 10, 11], b (3): [0, 1, 4, 6, 9, 10, 11, 12]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 2, 3, 6, 7, 8, 9, 12], b (9): [3, 4, 5, 8, 10, 11]
+idx: 8, delta: 2, matching: false, a (10): [6, 7, 8, 9, 12], b (7): [3, 4, 5, 8, 9, 10, 11, 12]
+idx: 8, delta: 3, matching: false, a (11): [5, 6, 10, 11], b (6): [2, 5, 6, 8, 9, 10, 11]
+idx: 8, delta: 4, matching: false, a (12): [3, 4, 5, 6, 7, 8, 10, 11], b (5): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [3, 4, 5, 8, 10, 11], b (10): [6, 7, 8, 9, 12]
+idx: 9, delta: 2, matching: false, a (11): [5, 6, 10, 11], b (8): [0, 1, 2, 3, 6, 7, 8, 9, 12]
+idx: 9, delta: 3, matching: false, a (12): [3, 4, 5, 6, 7, 8, 10, 11], b (7): [3, 4, 5, 8, 9, 10, 11, 12]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [6, 7, 8, 9, 12], b (11): [5, 6, 10, 11]
+idx: 10, delta: 2, matching: false, a (12): [3, 4, 5, 6, 7, 8, 10, 11], b (9): [3, 4, 5, 8, 10, 11]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [5, 6, 10, 11], b (12): [3, 4, 5, 6, 7, 8, 10, 11]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+idx: 0, delta: 0, matching: true, a (0): [1, 3, 5, 8], b (1): [1, 3, 5, 8]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 3, 5, 8], b (2): [0, 2, 4, 5, 6, 8]
+idx: 1, delta: 2, matching: false, a (3): [0, 7, 8, 9, 12], b (0): [1, 3, 5, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 4, 5, 6, 8], b (3): [0, 7, 8, 9, 12]
+idx: 2, delta: 2, matching: false, a (4): [3, 4, 7, 9, 12], b (1): [1, 3, 5, 8]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 5, 6, 7, 9, 11, 12], b (0): [1, 3, 5, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 7, 8, 9, 12], b (4): [3, 4, 7, 9, 12]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 5, 6, 7, 9, 11, 12], b (2): [0, 2, 4, 5, 6, 8]
+idx: 3, delta: 3, matching: false, a (6): [1, 3, 5, 6, 8, 10, 11, 12], b (1): [1, 3, 5, 8]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 4, 5, 8, 10, 12], b (0): [1, 3, 5, 8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [3, 4, 7, 9, 12], b (5): [1, 2, 5, 6, 7, 9, 11, 12]
+idx: 4, delta: 2, matching: false, a (6): [1, 3, 5, 6, 8, 10, 11, 12], b (3): [0, 7, 8, 9, 12]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 4, 5, 8, 10, 12], b (2): [0, 2, 4, 5, 6, 8]
+idx: 4, delta: 4, matching: false, a (8): [2, 5, 6, 7, 8, 9, 10, 12], b (1): [1, 3, 5, 8]
+idx: 4, delta: 5, matching: false, a (9): [0, 3, 5, 6, 7, 8, 10], b (0): [1, 3, 5, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 5, 6, 7, 9, 11, 12], b (6): [1, 3, 5, 6, 8, 10, 11, 12]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 4, 5, 8, 10, 12], b (4): [3, 4, 7, 9, 12]
+idx: 5, delta: 3, matching: false, a (8): [2, 5, 6, 7, 8, 9, 10, 12], b (3): [0, 7, 8, 9, 12]
+idx: 5, delta: 4, matching: false, a (9): [0, 3, 5, 6, 7, 8, 10], b (2): [0, 2, 4, 5, 6, 8]
+idx: 5, delta: 5, matching: false, a (10): [2, 3, 4, 5, 6, 7, 9, 11, 12], b (1): [1, 3, 5, 8]
+idx: 5, delta: 6, matching: false, a (11): [2, 3, 4, 5, 6, 7, 9, 11, 12], b (0): [1, 3, 5, 8]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 3, 5, 6, 8, 10, 11, 12], b (7): [0, 1, 4, 5, 8, 10, 12]
+idx: 6, delta: 2, matching: false, a (8): [2, 5, 6, 7, 8, 9, 10, 12], b (5): [1, 2, 5, 6, 7, 9, 11, 12]
+idx: 6, delta: 3, matching: false, a (9): [0, 3, 5, 6, 7, 8, 10], b (4): [3, 4, 7, 9, 12]
+idx: 6, delta: 4, matching: false, a (10): [2, 3, 4, 5, 6, 7, 9, 11, 12], b (3): [0, 7, 8, 9, 12]
+idx: 6, delta: 5, matching: false, a (11): [2, 3, 4, 5, 6, 7, 9, 11, 12], b (2): [0, 2, 4, 5, 6, 8]
+idx: 6, delta: 6, matching: false, a (12): [0, 3, 5, 7, 8, 10], b (1): [1, 3, 5, 8]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 4, 5, 8, 10, 12], b (8): [2, 5, 6, 7, 8, 9, 10, 12]
+idx: 7, delta: 2, matching: false, a (9): [0, 3, 5, 6, 7, 8, 10], b (6): [1, 3, 5, 6, 8, 10, 11, 12]
+idx: 7, delta: 3, matching: false, a (10): [2, 3, 4, 5, 6, 7, 9, 11, 12], b (5): [1, 2, 5, 6, 7, 9, 11, 12]
+idx: 7, delta: 4, matching: false, a (11): [2, 3, 4, 5, 6, 7, 9, 11, 12], b (4): [3, 4, 7, 9, 12]
+idx: 7, delta: 5, matching: false, a (12): [0, 3, 5, 7, 8, 10], b (3): [0, 7, 8, 9, 12]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [2, 5, 6, 7, 8, 9, 10, 12], b (9): [0, 3, 5, 6, 7, 8, 10]
+idx: 8, delta: 2, matching: false, a (10): [2, 3, 4, 5, 6, 7, 9, 11, 12], b (7): [0, 1, 4, 5, 8, 10, 12]
+idx: 8, delta: 3, matching: false, a (11): [2, 3, 4, 5, 6, 7, 9, 11, 12], b (6): [1, 3, 5, 6, 8, 10, 11, 12]
+idx: 8, delta: 4, matching: false, a (12): [0, 3, 5, 7, 8, 10], b (5): [1, 2, 5, 6, 7, 9, 11, 12]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 3, 5, 6, 7, 8, 10], b (10): [2, 3, 4, 5, 6, 7, 9, 11, 12]
+idx: 9, delta: 2, matching: false, a (11): [2, 3, 4, 5, 6, 7, 9, 11, 12], b (8): [2, 5, 6, 7, 8, 9, 10, 12]
+idx: 9, delta: 3, matching: false, a (12): [0, 3, 5, 7, 8, 10], b (7): [0, 1, 4, 5, 8, 10, 12]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: true, a (10): [2, 3, 4, 5, 6, 7, 9, 11, 12], b (11): [2, 3, 4, 5, 6, 7, 9, 11, 12]
+idx: 10, delta: 2, matching: false, a (12): [0, 3, 5, 7, 8, 10], b (9): [0, 3, 5, 6, 7, 8, 10]
+idx: 10, delta: 2 --- found smudge!
+idx: 10 --- EXITING WITH true
+.#.#.#..#....
+.#.#.#..#....
+#.#.###.#....
+#......###..#
+...##..#.#..#
+.##..###.#.##
+.#.#.##.#.###
+##..##..#.#.#
+..#..######.#
+#..#.####.#..
+..######.#.##
+..######.#.##
+#..#.#.##.#..
+1100 (vert: 0, horiz: 11)
+
+idx: 0, delta: 0, matching: true, a (0): [0, 1, 2, 3, 6, 7, 8, 9, 10, 12], b (1): [0, 1, 2, 3, 6, 7, 8, 9, 10, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 3, 6, 7, 8, 9, 10, 12], b (2): [3, 6, 11]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 4, 5, 8, 9, 11, 12], b (0): [0, 1, 2, 3, 6, 7, 8, 9, 10, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 6, 11], b (3): [0, 1, 4, 5, 8, 9, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [0, 4, 5, 9, 11, 12], b (1): [0, 1, 2, 3, 6, 7, 8, 9, 10, 12]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 6, 7, 9, 10, 12], b (0): [0, 1, 2, 3, 6, 7, 8, 9, 10, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 4, 5, 8, 9, 11, 12], b (4): [0, 4, 5, 9, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 6, 7, 9, 10, 12], b (2): [3, 6, 11]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 3, 6, 7, 8], b (1): [0, 1, 2, 3, 6, 7, 8, 9, 10, 12]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 3, 6, 7, 8, 10, 11], b (0): [0, 1, 2, 3, 6, 7, 8, 9, 10, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 4, 5, 9, 11, 12], b (5): [0, 2, 3, 6, 7, 9, 10, 12]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 3, 6, 7, 8], b (3): [0, 1, 4, 5, 8, 9, 11, 12]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 3, 6, 7, 8, 10, 11], b (2): [3, 6, 11]
+idx: 4, delta: 4, matching: false, a (8): [1, 4, 5, 8, 10], b (1): [0, 1, 2, 3, 6, 7, 8, 9, 10, 12]
+idx: 4, delta: 5, matching: false, a (9): [1, 2, 6, 7, 8, 11, 12], b (0): [0, 1, 2, 3, 6, 7, 8, 9, 10, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 3, 6, 7, 9, 10, 12], b (6): [1, 2, 3, 6, 7, 8]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 3, 6, 7, 8, 10, 11], b (4): [0, 4, 5, 9, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [1, 4, 5, 8, 10], b (3): [0, 1, 4, 5, 8, 9, 11, 12]
+idx: 5, delta: 4, matching: false, a (9): [1, 2, 6, 7, 8, 11, 12], b (2): [3, 6, 11]
+idx: 5, delta: 5, matching: false, a (10): [2, 3, 6, 7, 10], b (1): [0, 1, 2, 3, 6, 7, 8, 9, 10, 12]
+idx: 5, delta: 6, matching: false, a (11): [0, 4, 5, 9], b (0): [0, 1, 2, 3, 6, 7, 8, 9, 10, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 3, 6, 7, 8], b (7): [1, 2, 3, 6, 7, 8, 10, 11]
+idx: 6, delta: 2, matching: false, a (8): [1, 4, 5, 8, 10], b (5): [0, 2, 3, 6, 7, 9, 10, 12]
+idx: 6, delta: 3, matching: false, a (9): [1, 2, 6, 7, 8, 11, 12], b (4): [0, 4, 5, 9, 11, 12]
+idx: 6, delta: 4, matching: false, a (10): [2, 3, 6, 7, 10], b (3): [0, 1, 4, 5, 8, 9, 11, 12]
+idx: 6, delta: 5, matching: false, a (11): [0, 4, 5, 9], b (2): [3, 6, 11]
+idx: 6, delta: 6, matching: false, a (12): [2, 3, 4, 5, 6, 7, 10, 12], b (1): [0, 1, 2, 3, 6, 7, 8, 9, 10, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 3, 6, 7, 8, 10, 11], b (8): [1, 4, 5, 8, 10]
+idx: 7, delta: 2, matching: false, a (9): [1, 2, 6, 7, 8, 11, 12], b (6): [1, 2, 3, 6, 7, 8]
+idx: 7, delta: 3, matching: false, a (10): [2, 3, 6, 7, 10], b (5): [0, 2, 3, 6, 7, 9, 10, 12]
+idx: 7, delta: 4, matching: false, a (11): [0, 4, 5, 9], b (4): [0, 4, 5, 9, 11, 12]
+idx: 7, delta: 5, matching: false, a (12): [2, 3, 4, 5, 6, 7, 10, 12], b (3): [0, 1, 4, 5, 8, 9, 11, 12]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [1, 4, 5, 8, 10], b (9): [1, 2, 6, 7, 8, 11, 12]
+idx: 8, delta: 2, matching: false, a (10): [2, 3, 6, 7, 10], b (7): [1, 2, 3, 6, 7, 8, 10, 11]
+idx: 8, delta: 3, matching: false, a (11): [0, 4, 5, 9], b (6): [1, 2, 3, 6, 7, 8]
+idx: 8, delta: 4, matching: false, a (12): [2, 3, 4, 5, 6, 7, 10, 12], b (5): [0, 2, 3, 6, 7, 9, 10, 12]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 2, 6, 7, 8, 11, 12], b (10): [2, 3, 6, 7, 10]
+idx: 9, delta: 2, matching: false, a (11): [0, 4, 5, 9], b (8): [1, 4, 5, 8, 10]
+idx: 9, delta: 3, matching: false, a (12): [2, 3, 4, 5, 6, 7, 10, 12], b (7): [1, 2, 3, 6, 7, 8, 10, 11]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [2, 3, 6, 7, 10], b (11): [0, 4, 5, 9]
+idx: 10, delta: 2, matching: false, a (12): [2, 3, 4, 5, 6, 7, 10, 12], b (9): [1, 2, 6, 7, 8, 11, 12]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 4, 5, 9], b (12): [2, 3, 4, 5, 6, 7, 10, 12]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 4, 5, 11], b (1): [0, 1, 3, 6, 7, 8, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 3, 6, 7, 8, 9], b (2): [0, 1, 5, 6, 7, 9, 10, 12]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 5, 6, 7, 10, 12], b (0): [0, 1, 3, 4, 5, 11]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 5, 6, 7, 9, 10, 12], b (3): [0, 1, 2, 5, 6, 7, 10, 12]
+idx: 2, delta: 2, matching: false, a (4): [3, 4, 8, 11, 12], b (1): [0, 1, 3, 6, 7, 8, 9]
+idx: 2, delta: 3, matching: false, a (5): [3, 4, 8, 11, 12], b (0): [0, 1, 3, 4, 5, 11]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 5, 6, 7, 10, 12], b (4): [3, 4, 8, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [3, 4, 8, 11, 12], b (2): [0, 1, 5, 6, 7, 9, 10, 12]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 5, 6, 7, 9, 10, 12], b (1): [0, 1, 3, 6, 7, 8, 9]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 5, 6, 7, 9, 10, 12], b (0): [0, 1, 3, 4, 5, 11]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: true, a (4): [3, 4, 8, 11, 12], b (5): [3, 4, 8, 11, 12]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 5, 6, 7, 9, 10, 12], b (3): [0, 1, 2, 5, 6, 7, 10, 12]
+idx: 4, delta: 2 --- found smudge!
+idx: 4, delta: 3, matching: true, a (7): [0, 1, 5, 6, 7, 9, 10, 12], b (2): [0, 1, 5, 6, 7, 9, 10, 12]
+idx: 4, delta: 4, matching: true, a (8): [0, 1, 3, 6, 7, 8, 9], b (1): [0, 1, 3, 6, 7, 8, 9]
+idx: 4, delta: 5, matching: true, a (9): [0, 1, 3, 4, 5, 11], b (0): [0, 1, 3, 4, 5, 11]
+idx: 4 --- EXITING WITH true
+##.###.....#.
+##.#..####...
+##...###.##.#
+###..###..#.#
+...##...#..##
+...##...#..##
+###..###.##.#
+##...###.##.#
+##.#..####...
+##.###.....#.
+##...#.##.#.#
+..###..#.#...
+##.###...#..#
+500 (vert: 0, horiz: 5)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 6, 7, 8, 9], b (1): [1, 4, 6, 7, 9, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 4, 6, 7, 9, 10], b (2): [0, 1, 2, 4, 5, 6, 8, 9, 10]
+idx: 1, delta: 2, matching: false, a (3): [4, 5, 6, 7], b (0): [1, 6, 7, 8, 9]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 4, 5, 6, 8, 9, 10], b (3): [4, 5, 6, 7]
+idx: 2, delta: 2, matching: false, a (4): [0, 2, 3, 5, 6, 7, 8, 9, 10], b (1): [1, 4, 6, 7, 9, 10]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 3, 5, 6, 7], b (0): [1, 6, 7, 8, 9]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [4, 5, 6, 7], b (4): [0, 2, 3, 5, 6, 7, 8, 9, 10]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 3, 5, 6, 7], b (2): [0, 1, 2, 4, 5, 6, 8, 9, 10]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 4, 5, 8, 9], b (1): [1, 4, 6, 7, 9, 10]
+idx: 3, delta: 4, matching: false, a (7): [1, 3, 9, 10], b (0): [1, 6, 7, 8, 9]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 2, 3, 5, 6, 7, 8, 9, 10], b (5): [0, 1, 2, 3, 5, 6, 7]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 4, 5, 8, 9], b (3): [4, 5, 6, 7]
+idx: 4, delta: 3, matching: false, a (7): [1, 3, 9, 10], b (2): [0, 1, 2, 4, 5, 6, 8, 9, 10]
+idx: 4, delta: 4, matching: false, a (8): [1, 3, 9, 10], b (1): [1, 4, 6, 7, 9, 10]
+idx: 4, delta: 5, matching: false, a (9): [1, 2, 4, 5, 8, 9], b (0): [1, 6, 7, 8, 9]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 3, 5, 6, 7], b (6): [1, 2, 4, 5, 8, 9]
+idx: 5, delta: 2, matching: false, a (7): [1, 3, 9, 10], b (4): [0, 2, 3, 5, 6, 7, 8, 9, 10]
+idx: 5, delta: 3, matching: false, a (8): [1, 3, 9, 10], b (3): [4, 5, 6, 7]
+idx: 5, delta: 4, matching: false, a (9): [1, 2, 4, 5, 8, 9], b (2): [0, 1, 2, 4, 5, 6, 8, 9, 10]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 2, 3, 5, 6, 7], b (1): [1, 4, 6, 7, 9, 10]
+idx: 5, delta: 6, matching: false, a (11): [0, 2, 3, 5, 6, 7, 8, 9, 10], b (0): [1, 6, 7, 8, 9]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 4, 5, 8, 9], b (7): [1, 3, 9, 10]
+idx: 6, delta: 2, matching: false, a (8): [1, 3, 9, 10], b (5): [0, 1, 2, 3, 5, 6, 7]
+idx: 6, delta: 3, matching: false, a (9): [1, 2, 4, 5, 8, 9], b (4): [0, 2, 3, 5, 6, 7, 8, 9, 10]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 2, 3, 5, 6, 7], b (3): [4, 5, 6, 7]
+idx: 6, delta: 5, matching: false, a (11): [0, 2, 3, 5, 6, 7, 8, 9, 10], b (2): [0, 1, 2, 4, 5, 6, 8, 9, 10]
+idx: 6, delta: 6, matching: false, a (12): [4, 5, 6, 7], b (1): [1, 4, 6, 7, 9, 10]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 2, 4, 5, 6, 8, 9, 10], b (0): [1, 6, 7, 8, 9]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: true, a (7): [1, 3, 9, 10], b (8): [1, 3, 9, 10]
+idx: 7, delta: 2, matching: true, a (9): [1, 2, 4, 5, 8, 9], b (6): [1, 2, 4, 5, 8, 9]
+idx: 7, delta: 3, matching: true, a (10): [0, 1, 2, 3, 5, 6, 7], b (5): [0, 1, 2, 3, 5, 6, 7]
+idx: 7, delta: 4, matching: true, a (11): [0, 2, 3, 5, 6, 7, 8, 9, 10], b (4): [0, 2, 3, 5, 6, 7, 8, 9, 10]
+idx: 7, delta: 5, matching: true, a (12): [4, 5, 6, 7], b (3): [4, 5, 6, 7]
+idx: 7, delta: 6, matching: true, a (13): [0, 1, 2, 4, 5, 6, 8, 9, 10], b (2): [0, 1, 2, 4, 5, 6, 8, 9, 10]
+idx: 7, delta: 7, matching: false, a (14): [1, 4, 5, 6, 7, 9, 10], b (1): [1, 4, 6, 7, 9, 10]
+idx: 7, delta: 7 --- found smudge!
+idx: 7, delta: 8, matching: true, a (15): [1, 6, 7, 8, 9], b (0): [1, 6, 7, 8, 9]
+idx: 7 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [2, 4, 5, 10, 11, 13], b (1): [0, 1, 2, 5, 6, 7, 8, 9, 10, 13, 14, 15, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 5, 6, 7, 8, 9, 10, 13, 14, 15, 16], b (2): [2, 4, 5, 6, 9, 10, 11, 13]
+idx: 1, delta: 2, matching: false, a (3): [4, 5, 7, 8, 10, 11], b (0): [2, 4, 5, 10, 11, 13]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 4, 5, 6, 9, 10, 11, 13], b (3): [4, 5, 7, 8, 10, 11]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 6, 9, 12, 13, 14], b (1): [0, 1, 2, 5, 6, 7, 8, 9, 10, 13, 14, 15, 16]
+idx: 2, delta: 3, matching: false, a (5): [2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14], b (0): [2, 4, 5, 10, 11, 13]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [4, 5, 7, 8, 10, 11], b (4): [1, 2, 3, 6, 9, 12, 13, 14]
+idx: 3, delta: 2, matching: false, a (5): [2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14], b (2): [2, 4, 5, 6, 9, 10, 11, 13]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 3, 4, 5, 10, 11, 12, 13, 14, 15, 16], b (1): [0, 1, 2, 5, 6, 7, 8, 9, 10, 13, 14, 15, 16]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 3, 4, 5, 10, 11, 12, 14, 15, 16], b (0): [2, 4, 5, 10, 11, 13]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 6, 9, 12, 13, 14], b (5): [2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 3, 4, 5, 10, 11, 12, 13, 14, 15, 16], b (3): [4, 5, 7, 8, 10, 11]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 3, 4, 5, 10, 11, 12, 14, 15, 16], b (2): [2, 4, 5, 6, 9, 10, 11, 13]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 4, 6, 9, 11, 13, 15, 16], b (1): [0, 1, 2, 5, 6, 7, 8, 9, 10, 13, 14, 15, 16]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 4, 6, 7, 8, 9, 11, 13, 14, 15, 16], b (0): [2, 4, 5, 10, 11, 13]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14], b (6): [0, 1, 2, 3, 4, 5, 10, 11, 12, 13, 14, 15, 16]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 3, 4, 5, 10, 11, 12, 14, 15, 16], b (4): [1, 2, 3, 6, 9, 12, 13, 14]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 4, 6, 9, 11, 13, 15, 16], b (3): [4, 5, 7, 8, 10, 11]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 4, 6, 7, 8, 9, 11, 13, 14, 15, 16], b (2): [2, 4, 5, 6, 9, 10, 11, 13]
+idx: 5, delta: 5, matching: false, a (10): [1, 2, 4, 7, 8, 11, 13, 14], b (1): [0, 1, 2, 5, 6, 7, 8, 9, 10, 13, 14, 15, 16]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 3, 4, 5, 10, 11, 12, 13, 14, 15, 16], b (7): [0, 1, 3, 4, 5, 10, 11, 12, 14, 15, 16]
+idx: 6, delta: 2, matching: false, a (8): [0, 2, 4, 6, 9, 11, 13, 15, 16], b (5): [2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 4, 6, 7, 8, 9, 11, 13, 14, 15, 16], b (4): [1, 2, 3, 6, 9, 12, 13, 14]
+idx: 6, delta: 4, matching: false, a (10): [1, 2, 4, 7, 8, 11, 13, 14], b (3): [4, 5, 7, 8, 10, 11]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 3, 4, 5, 10, 11, 12, 14, 15, 16], b (8): [0, 2, 4, 6, 9, 11, 13, 15, 16]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 2, 4, 6, 7, 8, 9, 11, 13, 14, 15, 16], b (6): [0, 1, 2, 3, 4, 5, 10, 11, 12, 13, 14, 15, 16]
+idx: 7, delta: 3, matching: false, a (10): [1, 2, 4, 7, 8, 11, 13, 14], b (5): [2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 2, 4, 6, 9, 11, 13, 15, 16], b (9): [0, 1, 2, 4, 6, 7, 8, 9, 11, 13, 14, 15, 16]
+idx: 8, delta: 2, matching: false, a (10): [1, 2, 4, 7, 8, 11, 13, 14], b (7): [0, 1, 3, 4, 5, 10, 11, 12, 14, 15, 16]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 2, 4, 6, 7, 8, 9, 11, 13, 14, 15, 16], b (10): [1, 2, 4, 7, 8, 11, 13, 14]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+..#.##....##.#...
+###..######..####
+..#.###..###.#...
+....##.##.##.....
+.###..#..#..###..
+..#####..######..
+######....#######
+##.###....###.###
+#.#.#.#..#.#.#.##
+###.#.####.#.####
+.##.#..##..#.##..
+8 (vert: 8, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [3, 4, 5, 6], b (1): [0, 4, 5, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 4, 5, 6], b (2): [1, 4, 5, 6]
+idx: 1, delta: 2, matching: false, a (3): [3, 5, 6], b (0): [3, 4, 5, 6]
+idx: 1, delta: 2 --- found smudge!
+idx: 1 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [1, 4, 5, 8, 9], b (1): [2, 4, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 4, 9], b (2): [5, 6, 7, 8]
+idx: 1, delta: 2, matching: false, a (3): [0, 3, 4, 5, 8, 9, 10], b (0): [1, 4, 5, 8, 9]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [5, 6, 7, 8], b (3): [0, 3, 4, 5, 8, 9, 10]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 5, 7, 8], b (1): [2, 4, 9]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 3, 5, 8, 10], b (0): [1, 4, 5, 8, 9]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 3, 4, 5, 8, 9, 10], b (4): [0, 1, 2, 5, 7, 8]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 3, 5, 8, 10], b (2): [5, 6, 7, 8]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 3, 5, 8, 10], b (1): [2, 4, 9]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 5, 7, 8], b (5): [0, 1, 2, 3, 5, 8, 10]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 3, 5, 8, 10], b (3): [0, 3, 4, 5, 8, 9, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: true, a (5): [0, 1, 2, 3, 5, 8, 10], b (6): [0, 1, 2, 3, 5, 8, 10]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+.#..##..##.
+..#.#....#.
+.....####..
+#..###..###
+###..#.##..
+####.#..#.#
+####.#..#.#
+2 (vert: 2, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 3, 5, 6], b (1): [4, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [4, 6], b (2): [0, 1, 2, 3, 5, 7]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 6, 7, 8], b (0): [0, 3, 5, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 5, 7], b (3): [0, 1, 2, 3, 6, 7, 8]
+idx: 2, delta: 2, matching: false, a (4): [6, 7, 8], b (1): [4, 6]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 3, 8], b (0): [0, 3, 5, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 3, 6, 7, 8], b (4): [6, 7, 8]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 3, 8], b (2): [0, 1, 2, 3, 5, 7]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 3, 4, 6], b (1): [4, 6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [6, 7, 8], b (5): [0, 1, 2, 3, 8]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 3, 4, 6], b (3): [0, 1, 2, 3, 6, 7, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 3, 8], b (6): [0, 1, 2, 3, 4, 6]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 3, 5, 6], b (1): [2, 3, 5, 6]
+idx: 0, delta: 0 --- found smudge!
+idx: 0 --- EXITING WITH true
+#.##.##
+..##.##
+..##.##
+#.##.##
+.#....#
+#.#....
+##.##.#
+..###..
+...###.
+100 (vert: 0, horiz: 1)
+
+idx: 0, delta: 0, matching: false, a (0): [0], b (1): [0, 3, 5, 6, 8]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: true, a (1): [0, 3, 5, 6, 8], b (2): [0, 3, 5, 6, 8]
+idx: 1, delta: 2, matching: true, a (3): [0], b (0): [0]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 5, 6, 8], b (3): [0]
+idx: 2, delta: 2, matching: false, a (4): [1, 3, 5, 7], b (1): [0, 3, 5, 6, 8]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 3, 7], b (0): [0]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0], b (4): [1, 3, 5, 7]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 3, 7], b (2): [0, 3, 5, 6, 8]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 3, 4, 5, 7], b (1): [0, 3, 5, 6, 8]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 3, 4, 5, 7], b (0): [0]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 3, 5, 7], b (5): [0, 1, 3, 7]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 3, 4, 5, 7], b (3): [0]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 3, 4, 5, 7], b (2): [0, 3, 5, 6, 8]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 3, 7, 8], b (1): [0, 3, 5, 6, 8]
+idx: 4, delta: 5, matching: false, a (9): [1, 3, 5, 7], b (0): [0]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 3, 7], b (6): [1, 2, 3, 4, 5, 7]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 3, 4, 5, 7], b (4): [1, 3, 5, 7]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 3, 7, 8], b (3): [0]
+idx: 5, delta: 4, matching: false, a (9): [1, 3, 5, 7], b (2): [0, 3, 5, 6, 8]
+idx: 5, delta: 5, matching: false, a (10): [0], b (1): [0, 3, 5, 6, 8]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: true, a (6): [1, 2, 3, 4, 5, 7], b (7): [1, 2, 3, 4, 5, 7]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 3, 7, 8], b (5): [0, 1, 3, 7]
+idx: 6, delta: 2 --- found smudge!
+idx: 6, delta: 3, matching: true, a (9): [1, 3, 5, 7], b (4): [1, 3, 5, 7]
+idx: 6, delta: 4, matching: true, a (10): [0], b (3): [0]
+idx: 6 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 3, 5, 8, 10], b (1): [4, 5, 6, 7, 8, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [4, 5, 6, 7, 8, 9], b (2): [6, 7]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 4, 5, 6, 7, 8, 9], b (0): [0, 1, 2, 3, 5, 8, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [6, 7], b (3): [1, 2, 4, 5, 6, 7, 8, 9]
+idx: 2, delta: 2, matching: false, a (4): [6, 7], b (1): [4, 5, 6, 7, 8, 9]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 4, 6, 7, 9], b (0): [0, 1, 2, 3, 5, 8, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 4, 5, 6, 7, 8, 9], b (4): [6, 7]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 4, 6, 7, 9], b (2): [6, 7]
+idx: 3, delta: 3, matching: false, a (6): [1, 2], b (1): [4, 5, 6, 7, 8, 9]
+idx: 3, delta: 4, matching: false, a (7): [4, 5, 6, 7, 8, 9], b (0): [0, 1, 2, 3, 5, 8, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [6, 7], b (5): [1, 2, 4, 6, 7, 9]
+idx: 4, delta: 2, matching: false, a (6): [1, 2], b (3): [1, 2, 4, 5, 6, 7, 8, 9]
+idx: 4, delta: 3, matching: false, a (7): [4, 5, 6, 7, 8, 9], b (2): [6, 7]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 8], b (1): [4, 5, 6, 7, 8, 9]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 4, 6, 7, 9], b (6): [1, 2]
+idx: 5, delta: 2, matching: false, a (7): [4, 5, 6, 7, 8, 9], b (4): [6, 7]
+idx: 5, delta: 3, matching: false, a (8): [1, 2, 8], b (3): [1, 2, 4, 5, 6, 7, 8, 9]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2], b (7): [4, 5, 6, 7, 8, 9]
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 8], b (5): [1, 2, 4, 6, 7, 9]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [4, 5, 6, 7, 8, 9], b (8): [1, 2, 8]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+####.#..#.#
+....######.
+......##...
+.##.######.
+......##...
+.##.#.##.#.
+.##........
+....######.
+.##.....#..
+7 (vert: 7, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 6, 7, 11, 12, 13, 14], b (1): [0, 3, 6, 7, 10, 13, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 3, 6, 7, 10, 13, 14], b (2): [2, 11]
+idx: 1, delta: 2, matching: false, a (3): [2, 5, 8, 11, 13, 14], b (0): [0, 1, 2, 6, 7, 11, 12, 13, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 11], b (3): [2, 5, 8, 11, 13, 14]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 4, 5, 8, 9, 10, 11, 12], b (1): [0, 3, 6, 7, 10, 13, 14]
+idx: 2, delta: 3, matching: false, a (5): [1, 4, 6, 7, 9, 12], b (0): [0, 1, 2, 6, 7, 11, 12, 13, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 5, 8, 11, 13, 14], b (4): [1, 2, 3, 4, 5, 8, 9, 10, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [1, 4, 6, 7, 9, 12], b (2): [2, 11]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 4, 5, 8, 9, 12, 13, 14], b (1): [0, 3, 6, 7, 10, 13, 14]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14], b (0): [0, 1, 2, 6, 7, 11, 12, 13, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 4, 5, 8, 9, 10, 11, 12], b (5): [1, 4, 6, 7, 9, 12]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 4, 5, 8, 9, 12, 13, 14], b (3): [2, 5, 8, 11, 13, 14]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14], b (2): [2, 11]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 3, 10, 11, 12, 13, 14], b (1): [0, 3, 6, 7, 10, 13, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 4, 6, 7, 9, 12], b (6): [0, 1, 4, 5, 8, 9, 12, 13, 14]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14], b (4): [1, 2, 3, 4, 5, 8, 9, 10, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 3, 10, 11, 12, 13, 14], b (3): [2, 5, 8, 11, 13, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 4, 5, 8, 9, 12, 13, 14], b (7): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 3, 10, 11, 12, 13, 14], b (5): [1, 4, 6, 7, 9, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14], b (8): [0, 1, 2, 3, 10, 11, 12, 13, 14]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 6, 7, 8], b (1): [0, 4, 5, 6, 7, 8]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 4, 5, 6, 7, 8], b (2): [0, 2, 3, 4, 8]
+idx: 1, delta: 2, matching: false, a (3): [1, 4, 7, 8], b (0): [0, 1, 6, 7, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 3, 4, 8], b (3): [1, 4, 7, 8]
+idx: 2, delta: 2, matching: false, a (4): [4, 5, 6, 7], b (1): [0, 4, 5, 6, 7, 8]
+idx: 2, delta: 3, matching: false, a (5): [3, 4, 6, 7], b (0): [0, 1, 6, 7, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 4, 7, 8], b (4): [4, 5, 6, 7]
+idx: 3, delta: 2, matching: false, a (5): [3, 4, 6, 7], b (2): [0, 2, 3, 4, 8]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 5, 7], b (1): [0, 4, 5, 6, 7, 8]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 5, 7], b (0): [0, 1, 6, 7, 8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [4, 5, 6, 7], b (5): [3, 4, 6, 7]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 5, 7], b (3): [1, 4, 7, 8]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 5, 7], b (2): [0, 2, 3, 4, 8]
+idx: 4, delta: 4, matching: false, a (8): [3, 4, 6, 7], b (1): [0, 4, 5, 6, 7, 8]
+idx: 4, delta: 5, matching: false, a (9): [4, 5, 6, 7], b (0): [0, 1, 6, 7, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [3, 4, 6, 7], b (6): [0, 1, 5, 7]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 5, 7], b (4): [4, 5, 6, 7]
+idx: 5, delta: 3, matching: false, a (8): [3, 4, 6, 7], b (3): [1, 4, 7, 8]
+idx: 5, delta: 4, matching: false, a (9): [4, 5, 6, 7], b (2): [0, 2, 3, 4, 8]
+idx: 5, delta: 5, matching: false, a (10): [1, 4, 7, 8], b (1): [0, 4, 5, 6, 7, 8]
+idx: 5, delta: 6, matching: false, a (11): [0, 2, 3, 4, 8], b (0): [0, 1, 6, 7, 8]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: true, a (6): [0, 1, 5, 7], b (7): [0, 1, 5, 7]
+idx: 6, delta: 2, matching: true, a (8): [3, 4, 6, 7], b (5): [3, 4, 6, 7]
+idx: 6, delta: 3, matching: true, a (9): [4, 5, 6, 7], b (4): [4, 5, 6, 7]
+idx: 6, delta: 4, matching: true, a (10): [1, 4, 7, 8], b (3): [1, 4, 7, 8]
+idx: 6, delta: 5, matching: true, a (11): [0, 2, 3, 4, 8], b (2): [0, 2, 3, 4, 8]
+idx: 6, delta: 6, matching: true, a (12): [0, 4, 5, 6, 7, 8], b (1): [0, 4, 5, 6, 7, 8]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 3, 6, 7, 8], b (0): [0, 1, 6, 7, 8]
+idx: 6, delta: 7 --- found smudge!
+idx: 6 --- EXITING WITH true
+##....###
+#...#####
+#.###...#
+.#..#..##
+....####.
+...##.##.
+##...#.#.
+##...#.#.
+...##.##.
+....####.
+.#..#..##
+#.###...#
+#...#####
+##.#..###
+##.#..###
+700 (vert: 0, horiz: 7)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 4, 6, 7, 8, 9, 12], b (1): [7]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [7], b (2): [0, 2, 3, 4, 5, 6, 7, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 3, 4, 5, 6, 11], b (0): [0, 4, 6, 7, 8, 9, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 3, 4, 5, 6, 7, 11, 12], b (3): [0, 2, 3, 4, 5, 6, 11]
+idx: 2, delta: 2, matching: false, a (4): [2, 3, 9, 10, 12], b (1): [7]
+idx: 2, delta: 3, matching: false, a (5): [2, 3, 9, 10, 12], b (0): [0, 4, 6, 7, 8, 9, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 3, 4, 5, 6, 11], b (4): [2, 3, 9, 10, 12]
+idx: 3, delta: 2, matching: false, a (5): [2, 3, 9, 10, 12], b (2): [0, 2, 3, 4, 5, 6, 7, 11, 12]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 3, 4, 5, 6, 11], b (1): [7]
+idx: 3, delta: 4, matching: false, a (7): [0, 2, 3, 4, 5, 6, 7, 11, 12], b (0): [0, 4, 6, 7, 8, 9, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: true, a (4): [2, 3, 9, 10, 12], b (5): [2, 3, 9, 10, 12]
+idx: 4, delta: 2, matching: true, a (6): [0, 2, 3, 4, 5, 6, 11], b (3): [0, 2, 3, 4, 5, 6, 11]
+idx: 4, delta: 3, matching: true, a (7): [0, 2, 3, 4, 5, 6, 7, 11, 12], b (2): [0, 2, 3, 4, 5, 6, 7, 11, 12]
+idx: 4, delta: 4, matching: true, a (8): [7], b (1): [7]
+idx: 4, delta: 5, matching: true, a (9): [0, 4, 6, 7, 8, 9, 12], b (0): [0, 4, 6, 7, 8, 9, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 3, 9, 10, 12], b (6): [0, 2, 3, 4, 5, 6, 11]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 3, 4, 5, 6, 7, 11, 12], b (4): [2, 3, 9, 10, 12]
+idx: 5, delta: 3, matching: false, a (8): [7], b (3): [0, 2, 3, 4, 5, 6, 11]
+idx: 5, delta: 4, matching: false, a (9): [0, 4, 6, 7, 8, 9, 12], b (2): [0, 2, 3, 4, 5, 6, 7, 11, 12]
+idx: 5, delta: 5, matching: false, a (10): [1, 2, 4, 6, 8, 9, 11, 12], b (1): [7]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2, 5, 6, 8, 12], b (0): [0, 4, 6, 7, 8, 9, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 2, 3, 4, 5, 6, 11], b (7): [0, 2, 3, 4, 5, 6, 7, 11, 12]
+idx: 6, delta: 2, matching: false, a (8): [7], b (5): [2, 3, 9, 10, 12]
+idx: 6, delta: 3, matching: false, a (9): [0, 4, 6, 7, 8, 9, 12], b (4): [2, 3, 9, 10, 12]
+idx: 6, delta: 4, matching: false, a (10): [1, 2, 4, 6, 8, 9, 11, 12], b (3): [0, 2, 3, 4, 5, 6, 11]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 2, 5, 6, 8, 12], b (2): [0, 2, 3, 4, 5, 6, 7, 11, 12]
+idx: 6, delta: 6, matching: false, a (12): [2, 3, 4, 9, 10, 12], b (1): [7]
+idx: 6, delta: 7, matching: false, a (13): [0, 2, 4, 7, 9, 10, 11, 12], b (0): [0, 4, 6, 7, 8, 9, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 2, 3, 4, 5, 6, 7, 11, 12], b (8): [7]
+idx: 7, delta: 2, matching: false, a (9): [0, 4, 6, 7, 8, 9, 12], b (6): [0, 2, 3, 4, 5, 6, 11]
+idx: 7, delta: 3, matching: false, a (10): [1, 2, 4, 6, 8, 9, 11, 12], b (5): [2, 3, 9, 10, 12]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 2, 5, 6, 8, 12], b (4): [2, 3, 9, 10, 12]
+idx: 7, delta: 5, matching: false, a (12): [2, 3, 4, 9, 10, 12], b (3): [0, 2, 3, 4, 5, 6, 11]
+idx: 7, delta: 6, matching: false, a (13): [0, 2, 4, 7, 9, 10, 11, 12], b (2): [0, 2, 3, 4, 5, 6, 7, 11, 12]
+idx: 7, delta: 7, matching: false, a (14): [0, 3, 8, 9, 10], b (1): [7]
+idx: 7, delta: 8, matching: false, a (15): [0, 3, 4, 8, 9, 10], b (0): [0, 4, 6, 7, 8, 9, 12]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [7], b (9): [0, 4, 6, 7, 8, 9, 12]
+idx: 8, delta: 2, matching: false, a (10): [1, 2, 4, 6, 8, 9, 11, 12], b (7): [0, 2, 3, 4, 5, 6, 7, 11, 12]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 2, 5, 6, 8, 12], b (6): [0, 2, 3, 4, 5, 6, 11]
+idx: 8, delta: 4, matching: false, a (12): [2, 3, 4, 9, 10, 12], b (5): [2, 3, 9, 10, 12]
+idx: 8, delta: 4 --- found smudge!
+idx: 8, delta: 5, matching: false, a (13): [0, 2, 4, 7, 9, 10, 11, 12], b (4): [2, 3, 9, 10, 12]
+idx: 8, delta: 5 --- found smudge twice!
+idx: 9, delta: 0, matching: false, a (9): [0, 4, 6, 7, 8, 9, 12], b (10): [1, 2, 4, 6, 8, 9, 11, 12]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 2, 5, 6, 8, 12], b (8): [7]
+idx: 9, delta: 3, matching: false, a (12): [2, 3, 4, 9, 10, 12], b (7): [0, 2, 3, 4, 5, 6, 7, 11, 12]
+idx: 9, delta: 4, matching: false, a (13): [0, 2, 4, 7, 9, 10, 11, 12], b (6): [0, 2, 3, 4, 5, 6, 11]
+idx: 9, delta: 5, matching: false, a (14): [0, 3, 8, 9, 10], b (5): [2, 3, 9, 10, 12]
+idx: 9, delta: 6, matching: false, a (15): [0, 3, 4, 8, 9, 10], b (4): [2, 3, 9, 10, 12]
+idx: 9, delta: 7, matching: false, a (16): [0, 2, 4, 7, 9, 10, 11, 12], b (3): [0, 2, 3, 4, 5, 6, 11]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [1, 2, 4, 6, 8, 9, 11, 12], b (11): [0, 1, 2, 5, 6, 8, 12]
+idx: 10, delta: 2, matching: false, a (12): [2, 3, 4, 9, 10, 12], b (9): [0, 4, 6, 7, 8, 9, 12]
+idx: 10, delta: 3, matching: false, a (13): [0, 2, 4, 7, 9, 10, 11, 12], b (8): [7]
+idx: 10, delta: 4, matching: false, a (14): [0, 3, 8, 9, 10], b (7): [0, 2, 3, 4, 5, 6, 7, 11, 12]
+idx: 10, delta: 5, matching: false, a (15): [0, 3, 4, 8, 9, 10], b (6): [0, 2, 3, 4, 5, 6, 11]
+idx: 10, delta: 6, matching: false, a (16): [0, 2, 4, 7, 9, 10, 11, 12], b (5): [2, 3, 9, 10, 12]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 2, 5, 6, 8, 12], b (12): [2, 3, 4, 9, 10, 12]
+idx: 11, delta: 2, matching: false, a (13): [0, 2, 4, 7, 9, 10, 11, 12], b (10): [1, 2, 4, 6, 8, 9, 11, 12]
+idx: 11, delta: 3, matching: false, a (14): [0, 3, 8, 9, 10], b (9): [0, 4, 6, 7, 8, 9, 12]
+idx: 11, delta: 4, matching: false, a (15): [0, 3, 4, 8, 9, 10], b (8): [7]
+idx: 11, delta: 5, matching: false, a (16): [0, 2, 4, 7, 9, 10, 11, 12], b (7): [0, 2, 3, 4, 5, 6, 7, 11, 12]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [2, 3, 4, 9, 10, 12], b (13): [0, 2, 4, 7, 9, 10, 11, 12]
+idx: 12, delta: 2, matching: false, a (14): [0, 3, 8, 9, 10], b (11): [0, 1, 2, 5, 6, 8, 12]
+idx: 12, delta: 3, matching: false, a (15): [0, 3, 4, 8, 9, 10], b (10): [1, 2, 4, 6, 8, 9, 11, 12]
+idx: 12, delta: 4, matching: false, a (16): [0, 2, 4, 7, 9, 10, 11, 12], b (9): [0, 4, 6, 7, 8, 9, 12]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 2, 4, 7, 9, 10, 11, 12], b (14): [0, 3, 8, 9, 10]
+idx: 13, delta: 2, matching: false, a (15): [0, 3, 4, 8, 9, 10], b (12): [2, 3, 4, 9, 10, 12]
+idx: 13, delta: 3, matching: false, a (16): [0, 2, 4, 7, 9, 10, 11, 12], b (11): [0, 1, 2, 5, 6, 8, 12]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [0, 3, 8, 9, 10], b (15): [0, 3, 4, 8, 9, 10]
+idx: 14, delta: 0 --- found smudge!
+idx: 14, delta: 2, matching: true, a (16): [0, 2, 4, 7, 9, 10, 11, 12], b (13): [0, 2, 4, 7, 9, 10, 11, 12]
+idx: 14 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 3, 6, 7, 9, 11, 13, 14, 15, 16], b (1): [10, 11]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [10, 11], b (2): [2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 16]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 4, 5, 6, 7, 12, 14, 15], b (0): [0, 2, 3, 6, 7, 9, 11, 13, 14, 15, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 16], b (3): [2, 3, 4, 5, 6, 7, 12, 14, 15]
+idx: 2, delta: 2, matching: false, a (4): [0, 2, 3, 6, 7, 9, 10, 12, 13, 15, 16], b (1): [10, 11]
+idx: 2, delta: 3, matching: false, a (5): [2, 3, 6, 7, 11], b (0): [0, 2, 3, 6, 7, 9, 11, 13, 14, 15, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 3, 4, 5, 6, 7, 12, 14, 15], b (4): [0, 2, 3, 6, 7, 9, 10, 12, 13, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [2, 3, 6, 7, 11], b (2): [2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 16]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 3, 6, 7, 9, 10, 11], b (1): [10, 11]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2, 7, 8, 9, 13, 16], b (0): [0, 2, 3, 6, 7, 9, 11, 13, 14, 15, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 2, 3, 6, 7, 9, 10, 12, 13, 15, 16], b (5): [2, 3, 6, 7, 11]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 3, 6, 7, 9, 10, 11], b (3): [2, 3, 4, 5, 6, 7, 12, 14, 15]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 2, 7, 8, 9, 13, 16], b (2): [2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 16]
+idx: 4, delta: 4, matching: false, a (8): [0, 9, 10, 11, 14, 15], b (1): [10, 11]
+idx: 4, delta: 5, matching: false, a (9): [0, 4, 5, 9, 10, 12, 13, 14, 15, 16], b (0): [0, 2, 3, 6, 7, 9, 11, 13, 14, 15, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 3, 6, 7, 11], b (6): [0, 2, 3, 6, 7, 9, 10, 11]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2, 7, 8, 9, 13, 16], b (4): [0, 2, 3, 6, 7, 9, 10, 12, 13, 15, 16]
+idx: 5, delta: 3, matching: false, a (8): [0, 9, 10, 11, 14, 15], b (3): [2, 3, 4, 5, 6, 7, 12, 14, 15]
+idx: 5, delta: 4, matching: false, a (9): [0, 4, 5, 9, 10, 12, 13, 14, 15, 16], b (2): [2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 16]
+idx: 5, delta: 5, matching: false, a (10): [4, 5, 12, 13, 14, 15, 16], b (1): [10, 11]
+idx: 5, delta: 6, matching: false, a (11): [2, 3, 6, 7, 10, 13, 16], b (0): [0, 2, 3, 6, 7, 9, 11, 13, 14, 15, 16]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 2, 3, 6, 7, 9, 10, 11], b (7): [0, 1, 2, 7, 8, 9, 13, 16]
+idx: 6, delta: 2, matching: false, a (8): [0, 9, 10, 11, 14, 15], b (5): [2, 3, 6, 7, 11]
+idx: 6, delta: 3, matching: false, a (9): [0, 4, 5, 9, 10, 12, 13, 14, 15, 16], b (4): [0, 2, 3, 6, 7, 9, 10, 12, 13, 15, 16]
+idx: 6, delta: 4, matching: false, a (10): [4, 5, 12, 13, 14, 15, 16], b (3): [2, 3, 4, 5, 6, 7, 12, 14, 15]
+idx: 6, delta: 5, matching: false, a (11): [2, 3, 6, 7, 10, 13, 16], b (2): [2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 16]
+idx: 6, delta: 6, matching: false, a (12): [0, 2, 4, 5, 7, 9, 10, 11, 12, 13, 16], b (1): [10, 11]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 2, 7, 8, 9, 13, 16], b (8): [0, 9, 10, 11, 14, 15]
+idx: 7, delta: 2, matching: false, a (9): [0, 4, 5, 9, 10, 12, 13, 14, 15, 16], b (6): [0, 2, 3, 6, 7, 9, 10, 11]
+idx: 7, delta: 3, matching: false, a (10): [4, 5, 12, 13, 14, 15, 16], b (5): [2, 3, 6, 7, 11]
+idx: 7, delta: 4, matching: false, a (11): [2, 3, 6, 7, 10, 13, 16], b (4): [0, 2, 3, 6, 7, 9, 10, 12, 13, 15, 16]
+idx: 7, delta: 5, matching: false, a (12): [0, 2, 4, 5, 7, 9, 10, 11, 12, 13, 16], b (3): [2, 3, 4, 5, 6, 7, 12, 14, 15]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 9, 10, 11, 14, 15], b (9): [0, 4, 5, 9, 10, 12, 13, 14, 15, 16]
+idx: 8, delta: 2, matching: false, a (10): [4, 5, 12, 13, 14, 15, 16], b (7): [0, 1, 2, 7, 8, 9, 13, 16]
+idx: 8, delta: 3, matching: false, a (11): [2, 3, 6, 7, 10, 13, 16], b (6): [0, 2, 3, 6, 7, 9, 10, 11]
+idx: 8, delta: 4, matching: false, a (12): [0, 2, 4, 5, 7, 9, 10, 11, 12, 13, 16], b (5): [2, 3, 6, 7, 11]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 4, 5, 9, 10, 12, 13, 14, 15, 16], b (10): [4, 5, 12, 13, 14, 15, 16]
+idx: 9, delta: 2, matching: false, a (11): [2, 3, 6, 7, 10, 13, 16], b (8): [0, 9, 10, 11, 14, 15]
+idx: 9, delta: 3, matching: false, a (12): [0, 2, 4, 5, 7, 9, 10, 11, 12, 13, 16], b (7): [0, 1, 2, 7, 8, 9, 13, 16]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [4, 5, 12, 13, 14, 15, 16], b (11): [2, 3, 6, 7, 10, 13, 16]
+idx: 10, delta: 2, matching: false, a (12): [0, 2, 4, 5, 7, 9, 10, 11, 12, 13, 16], b (9): [0, 4, 5, 9, 10, 12, 13, 14, 15, 16]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [2, 3, 6, 7, 10, 13, 16], b (12): [0, 2, 4, 5, 7, 9, 10, 11, 12, 13, 16]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+#.##..##.#.#.####
+..........##.....
+..######..####..#
+..######....#.##.
+#.##..##.##.##.##
+..##..##...#.....
+#.##..##.###.....
+###....###...#..#
+#........###..##.
+#...##...##.#####
+....##......#####
+..##..##..#..#..#
+#.#.##.#.#####..#
+15 (vert: 15, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 7, 8, 9], b (1): [0, 3, 7, 8, 9]
+idx: 0, delta: 0 --- found smudge!
+idx: 0 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 4, 6, 7, 11, 12, 13], b (1): [0, 2, 3, 4, 5, 7, 8, 11, 12, 13]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 3, 4, 5, 7, 8, 11, 12, 13], b (2): [2, 3, 4, 5, 8]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 3, 4, 6, 7, 9, 12], b (0): [0, 1, 3, 4, 6, 7, 11, 12, 13]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 3, 4, 5, 8], b (3): [0, 1, 3, 4, 6, 7, 9, 12]
+idx: 2, delta: 2, matching: false, a (4): [2, 3, 4, 5, 9, 13, 14], b (1): [0, 2, 3, 4, 5, 7, 8, 11, 12, 13]
+idx: 2, delta: 3, matching: false, a (5): [8, 10, 12, 14], b (0): [0, 1, 3, 4, 6, 7, 11, 12, 13]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 3, 4, 6, 7, 9, 12], b (4): [2, 3, 4, 5, 9, 13, 14]
+idx: 3, delta: 2, matching: false, a (5): [8, 10, 12, 14], b (2): [2, 3, 4, 5, 8]
+idx: 3, delta: 3, matching: false, a (6): [2, 5, 8, 12, 13], b (1): [0, 2, 3, 4, 5, 7, 8, 11, 12, 13]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 3, 4, 6, 7, 8, 11, 12, 14], b (0): [0, 1, 3, 4, 6, 7, 11, 12, 13]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 3, 4, 5, 9, 13, 14], b (5): [8, 10, 12, 14]
+idx: 4, delta: 2, matching: false, a (6): [2, 5, 8, 12, 13], b (3): [0, 1, 3, 4, 6, 7, 9, 12]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 3, 4, 6, 7, 8, 11, 12, 14], b (2): [2, 3, 4, 5, 8]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 3, 4, 6, 7, 8, 12, 13, 14], b (1): [0, 2, 3, 4, 5, 7, 8, 11, 12, 13]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 5, 6, 7, 9, 13, 14], b (0): [0, 1, 3, 4, 6, 7, 11, 12, 13]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [8, 10, 12, 14], b (6): [2, 5, 8, 12, 13]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 3, 4, 6, 7, 8, 11, 12, 14], b (4): [2, 3, 4, 5, 9, 13, 14]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 3, 4, 6, 7, 8, 12, 13, 14], b (3): [0, 1, 3, 4, 6, 7, 9, 12]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 5, 6, 7, 9, 13, 14], b (2): [2, 3, 4, 5, 8]
+idx: 5, delta: 5, matching: false, a (10): [2, 5, 9, 10, 13], b (1): [0, 2, 3, 4, 5, 7, 8, 11, 12, 13]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [2, 5, 8, 12, 13], b (7): [0, 1, 3, 4, 6, 7, 8, 11, 12, 14]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 3, 4, 6, 7, 8, 12, 13, 14], b (5): [8, 10, 12, 14]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 5, 6, 7, 9, 13, 14], b (4): [2, 3, 4, 5, 9, 13, 14]
+idx: 6, delta: 4, matching: false, a (10): [2, 5, 9, 10, 13], b (3): [0, 1, 3, 4, 6, 7, 9, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 3, 4, 6, 7, 8, 11, 12, 14], b (8): [0, 1, 3, 4, 6, 7, 8, 12, 13, 14]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 2, 5, 6, 7, 9, 13, 14], b (6): [2, 5, 8, 12, 13]
+idx: 7, delta: 3, matching: false, a (10): [2, 5, 9, 10, 13], b (5): [8, 10, 12, 14]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 3, 4, 6, 7, 8, 12, 13, 14], b (9): [0, 1, 2, 5, 6, 7, 9, 13, 14]
+idx: 8, delta: 2, matching: false, a (10): [2, 5, 9, 10, 13], b (7): [0, 1, 3, 4, 6, 7, 8, 11, 12, 14]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 2, 5, 6, 7, 9, 13, 14], b (10): [2, 5, 9, 10, 13]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+##.##.##...###.
+#.####.##..###.
+..####..#......
+##.##.##.#..#..
+..####...#...##
+........#.#.#.#
+..#..#..#...##.
+##.##.###..##.#
+##.##.###...###
+###..###.#...##
+..#..#...##..#.
+1 (vert: 1, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 8, 11], b (1): [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 3, 4, 5, 6, 7, 8, 9, 10], b (2): [3, 6, 8, 10, 11]
+idx: 1, delta: 2, matching: false, a (3): [5, 6, 8, 9, 10], b (0): [0, 2, 8, 11]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 6, 8, 10, 11], b (3): [5, 6, 8, 9, 10]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 3, 4, 5, 8, 10], b (1): [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+idx: 2, delta: 3, matching: false, a (5): [1, 3, 5, 6, 10, 11], b (0): [0, 2, 8, 11]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [5, 6, 8, 9, 10], b (4): [0, 1, 2, 3, 4, 5, 8, 10]
+idx: 3, delta: 2, matching: false, a (5): [1, 3, 5, 6, 10, 11], b (2): [3, 6, 8, 10, 11]
+idx: 3, delta: 3, matching: false, a (6): [1, 3, 6, 10, 11], b (1): [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+idx: 3, delta: 4, matching: false, a (7): [0, 2, 3, 4, 6, 8, 9], b (0): [0, 2, 8, 11]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 3, 4, 5, 8, 10], b (5): [1, 3, 5, 6, 10, 11]
+idx: 4, delta: 2, matching: false, a (6): [1, 3, 6, 10, 11], b (3): [5, 6, 8, 9, 10]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 3, 4, 6, 8, 9], b (2): [3, 6, 8, 10, 11]
+idx: 4, delta: 4, matching: false, a (8): [2, 3, 5, 6, 7, 11, 12], b (1): [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+idx: 4, delta: 5, matching: false, a (9): [1, 6, 9, 10, 12], b (0): [0, 2, 8, 11]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 3, 5, 6, 10, 11], b (6): [1, 3, 6, 10, 11]
+idx: 5, delta: 0 --- found smudge!
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 3, 4, 6, 8, 9], b (4): [0, 1, 2, 3, 4, 5, 8, 10]
+idx: 5, delta: 2 --- found smudge twice!
+idx: 6, delta: 0, matching: false, a (6): [1, 3, 6, 10, 11], b (7): [0, 2, 3, 4, 6, 8, 9]
+idx: 6, delta: 2, matching: false, a (8): [2, 3, 5, 6, 7, 11, 12], b (5): [1, 3, 5, 6, 10, 11]
+idx: 6, delta: 3, matching: false, a (9): [1, 6, 9, 10, 12], b (4): [0, 1, 2, 3, 4, 5, 8, 10]
+idx: 6, delta: 4, matching: false, a (10): [1, 6, 9, 10, 12], b (3): [5, 6, 8, 9, 10]
+idx: 6, delta: 5, matching: false, a (11): [2, 3, 5, 6, 7, 11, 12], b (2): [3, 6, 8, 10, 11]
+idx: 6, delta: 6, matching: false, a (12): [0, 2, 3, 4, 6, 8, 9], b (1): [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+idx: 6, delta: 7, matching: false, a (13): [1, 3, 6, 10, 11], b (0): [0, 2, 8, 11]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 2, 3, 4, 6, 8, 9], b (8): [2, 3, 5, 6, 7, 11, 12]
+idx: 7, delta: 2, matching: false, a (9): [1, 6, 9, 10, 12], b (6): [1, 3, 6, 10, 11]
+idx: 7, delta: 3, matching: false, a (10): [1, 6, 9, 10, 12], b (5): [1, 3, 5, 6, 10, 11]
+idx: 7, delta: 4, matching: false, a (11): [2, 3, 5, 6, 7, 11, 12], b (4): [0, 1, 2, 3, 4, 5, 8, 10]
+idx: 7, delta: 5, matching: false, a (12): [0, 2, 3, 4, 6, 8, 9], b (3): [5, 6, 8, 9, 10]
+idx: 7, delta: 6, matching: false, a (13): [1, 3, 6, 10, 11], b (2): [3, 6, 8, 10, 11]
+idx: 7, delta: 7, matching: false, a (14): [1, 3, 5, 6, 10, 11], b (1): [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [2, 3, 5, 6, 7, 11, 12], b (9): [1, 6, 9, 10, 12]
+idx: 8, delta: 2, matching: false, a (10): [1, 6, 9, 10, 12], b (7): [0, 2, 3, 4, 6, 8, 9]
+idx: 8, delta: 3, matching: false, a (11): [2, 3, 5, 6, 7, 11, 12], b (6): [1, 3, 6, 10, 11]
+idx: 8, delta: 4, matching: false, a (12): [0, 2, 3, 4, 6, 8, 9], b (5): [1, 3, 5, 6, 10, 11]
+idx: 8, delta: 5, matching: false, a (13): [1, 3, 6, 10, 11], b (4): [0, 1, 2, 3, 4, 5, 8, 10]
+idx: 8, delta: 6, matching: false, a (14): [1, 3, 5, 6, 10, 11], b (3): [5, 6, 8, 9, 10]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: true, a (9): [1, 6, 9, 10, 12], b (10): [1, 6, 9, 10, 12]
+idx: 9, delta: 2, matching: true, a (11): [2, 3, 5, 6, 7, 11, 12], b (8): [2, 3, 5, 6, 7, 11, 12]
+idx: 9, delta: 3, matching: true, a (12): [0, 2, 3, 4, 6, 8, 9], b (7): [0, 2, 3, 4, 6, 8, 9]
+idx: 9, delta: 4, matching: true, a (13): [1, 3, 6, 10, 11], b (6): [1, 3, 6, 10, 11]
+idx: 9, delta: 5, matching: true, a (14): [1, 3, 5, 6, 10, 11], b (5): [1, 3, 5, 6, 10, 11]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [1, 6, 9, 10, 12], b (11): [2, 3, 5, 6, 7, 11, 12]
+idx: 10, delta: 2, matching: false, a (12): [0, 2, 3, 4, 6, 8, 9], b (9): [1, 6, 9, 10, 12]
+idx: 10, delta: 3, matching: false, a (13): [1, 3, 6, 10, 11], b (8): [2, 3, 5, 6, 7, 11, 12]
+idx: 10, delta: 4, matching: false, a (14): [1, 3, 5, 6, 10, 11], b (7): [0, 2, 3, 4, 6, 8, 9]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [2, 3, 5, 6, 7, 11, 12], b (12): [0, 2, 3, 4, 6, 8, 9]
+idx: 11, delta: 2, matching: false, a (13): [1, 3, 6, 10, 11], b (10): [1, 6, 9, 10, 12]
+idx: 11, delta: 3, matching: false, a (14): [1, 3, 5, 6, 10, 11], b (9): [1, 6, 9, 10, 12]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 2, 3, 4, 6, 8, 9], b (13): [1, 3, 6, 10, 11]
+idx: 12, delta: 2, matching: false, a (14): [1, 3, 5, 6, 10, 11], b (11): [2, 3, 5, 6, 7, 11, 12]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [1, 3, 6, 10, 11], b (14): [1, 3, 5, 6, 10, 11]
+idx: 13, delta: 0 --- found smudge!
+idx: 13 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 4, 7, 12], b (1): [1, 4, 5, 6, 9, 10, 13, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 4, 5, 6, 9, 10, 13, 14], b (2): [0, 1, 4, 7, 8, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 4, 5, 6, 7, 8, 11, 12, 13, 14], b (0): [0, 4, 7, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 4, 7, 8, 11, 12], b (3): [1, 2, 4, 5, 6, 7, 8, 11, 12, 13, 14]
+idx: 2, delta: 2, matching: false, a (4): [1, 4, 7, 12], b (1): [1, 4, 5, 6, 9, 10, 13, 14]
+idx: 2, delta: 3, matching: false, a (5): [1, 3, 4, 5, 8, 11, 14], b (0): [0, 4, 7, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 4, 5, 6, 7, 8, 11, 12, 13, 14], b (4): [1, 4, 7, 12]
+idx: 3, delta: 2, matching: false, a (5): [1, 3, 4, 5, 8, 11, 14], b (2): [0, 1, 4, 7, 8, 11, 12]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14], b (1): [1, 4, 5, 6, 9, 10, 13, 14]
+idx: 3, delta: 4, matching: false, a (7): [1, 8, 11], b (0): [0, 4, 7, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 4, 7, 12], b (5): [1, 3, 4, 5, 8, 11, 14]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14], b (3): [1, 2, 4, 5, 6, 7, 8, 11, 12, 13, 14]
+idx: 4, delta: 3, matching: false, a (7): [1, 8, 11], b (2): [0, 1, 4, 7, 8, 11, 12]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 3, 4, 7, 12], b (1): [1, 4, 5, 6, 9, 10, 13, 14]
+idx: 4, delta: 5, matching: false, a (9): [1, 3, 7, 9, 10, 12], b (0): [0, 4, 7, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 3, 4, 5, 8, 11, 14], b (6): [1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 5, delta: 2, matching: false, a (7): [1, 8, 11], b (4): [1, 4, 7, 12]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 3, 4, 7, 12], b (3): [1, 2, 4, 5, 6, 7, 8, 11, 12, 13, 14]
+idx: 5, delta: 4, matching: false, a (9): [1, 3, 7, 9, 10, 12], b (2): [0, 1, 4, 7, 8, 11, 12]
+idx: 5, delta: 5, matching: false, a (10): [1, 2, 3, 4, 5, 6, 9, 10, 13, 14], b (1): [1, 4, 5, 6, 9, 10, 13, 14]
+idx: 5, delta: 6, matching: false, a (11): [0, 2, 5, 6, 8, 11, 13, 14], b (0): [0, 4, 7, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14], b (7): [1, 8, 11]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 3, 4, 7, 12], b (5): [1, 3, 4, 5, 8, 11, 14]
+idx: 6, delta: 3, matching: false, a (9): [1, 3, 7, 9, 10, 12], b (4): [1, 4, 7, 12]
+idx: 6, delta: 4, matching: false, a (10): [1, 2, 3, 4, 5, 6, 9, 10, 13, 14], b (3): [1, 2, 4, 5, 6, 7, 8, 11, 12, 13, 14]
+idx: 6, delta: 5, matching: false, a (11): [0, 2, 5, 6, 8, 11, 13, 14], b (2): [0, 1, 4, 7, 8, 11, 12]
+idx: 6, delta: 6, matching: false, a (12): [8, 9, 10, 11], b (1): [1, 4, 5, 6, 9, 10, 13, 14]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 8, 11], b (8): [0, 1, 2, 3, 4, 7, 12]
+idx: 7, delta: 2, matching: false, a (9): [1, 3, 7, 9, 10, 12], b (6): [1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 7, delta: 3, matching: false, a (10): [1, 2, 3, 4, 5, 6, 9, 10, 13, 14], b (5): [1, 3, 4, 5, 8, 11, 14]
+idx: 7, delta: 4, matching: false, a (11): [0, 2, 5, 6, 8, 11, 13, 14], b (4): [1, 4, 7, 12]
+idx: 7, delta: 5, matching: false, a (12): [8, 9, 10, 11], b (3): [1, 2, 4, 5, 6, 7, 8, 11, 12, 13, 14]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 2, 3, 4, 7, 12], b (9): [1, 3, 7, 9, 10, 12]
+idx: 8, delta: 2, matching: false, a (10): [1, 2, 3, 4, 5, 6, 9, 10, 13, 14], b (7): [1, 8, 11]
+idx: 8, delta: 3, matching: false, a (11): [0, 2, 5, 6, 8, 11, 13, 14], b (6): [1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 8, delta: 4, matching: false, a (12): [8, 9, 10, 11], b (5): [1, 3, 4, 5, 8, 11, 14]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 3, 7, 9, 10, 12], b (10): [1, 2, 3, 4, 5, 6, 9, 10, 13, 14]
+idx: 9, delta: 2, matching: false, a (11): [0, 2, 5, 6, 8, 11, 13, 14], b (8): [0, 1, 2, 3, 4, 7, 12]
+idx: 9, delta: 3, matching: false, a (12): [8, 9, 10, 11], b (7): [1, 8, 11]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [1, 2, 3, 4, 5, 6, 9, 10, 13, 14], b (11): [0, 2, 5, 6, 8, 11, 13, 14]
+idx: 10, delta: 2, matching: false, a (12): [8, 9, 10, 11], b (9): [1, 3, 7, 9, 10, 12]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 2, 5, 6, 8, 11, 13, 14], b (12): [8, 9, 10, 11]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+#...#..#....#..
+.#..###..##..##
+##..#..##..##..
+.##.#####..####
+.#..#..#....#..
+.#.###..#..#..#
+.###.##########
+.#......#..#...
+#####..#....#..
+.#.#...#.##.#..
+.######..##..##
+#.#..##.#..#.##
+........####...
+14 (vert: 14, horiz: 0)
+
+idx: 0, delta: 0, matching: true, a (0): [0, 2, 3, 4, 6], b (1): [0, 2, 3, 4, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 3, 4, 6], b (2): [2, 4]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 3, 6, 8], b (0): [0, 2, 3, 4, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 4], b (3): [0, 2, 3, 6, 8]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 5, 7, 8, 9, 10], b (1): [0, 2, 3, 4, 6]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 5, 8, 9], b (0): [0, 2, 3, 4, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 3, 6, 8], b (4): [1, 2, 3, 5, 7, 8, 9, 10]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 5, 8, 9], b (2): [2, 4]
+idx: 3, delta: 3, matching: false, a (6): [3, 8, 9], b (1): [0, 2, 3, 4, 6]
+idx: 3, delta: 4, matching: false, a (7): [0, 3, 4, 5, 7, 8, 9, 10], b (0): [0, 2, 3, 4, 6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 5, 7, 8, 9, 10], b (5): [0, 2, 5, 8, 9]
+idx: 4, delta: 2, matching: false, a (6): [3, 8, 9], b (3): [0, 2, 3, 6, 8]
+idx: 4, delta: 3, matching: false, a (7): [0, 3, 4, 5, 7, 8, 9, 10], b (2): [2, 4]
+idx: 4, delta: 4, matching: false, a (8): [0, 5, 7, 8, 9, 10], b (1): [0, 2, 3, 4, 6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 5, 8, 9], b (6): [3, 8, 9]
+idx: 5, delta: 2, matching: false, a (7): [0, 3, 4, 5, 7, 8, 9, 10], b (4): [1, 2, 3, 5, 7, 8, 9, 10]
+idx: 5, delta: 3, matching: false, a (8): [0, 5, 7, 8, 9, 10], b (3): [0, 2, 3, 6, 8]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [3, 8, 9], b (7): [0, 3, 4, 5, 7, 8, 9, 10]
+idx: 6, delta: 2, matching: false, a (8): [0, 5, 7, 8, 9, 10], b (5): [0, 2, 5, 8, 9]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 3, 4, 5, 7, 8, 9, 10], b (8): [0, 5, 7, 8, 9, 10]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 5, 7, 8], b (1): [4]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [4], b (2): [0, 1, 2, 3, 4, 5]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 3, 4, 6, 7], b (0): [0, 1, 3, 5, 7, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 4, 5], b (3): [0, 1, 3, 4, 6, 7]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 7], b (1): [4]
+idx: 2, delta: 3, matching: false, a (5): [4, 5, 7, 8], b (0): [0, 1, 3, 5, 7, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 3, 4, 6, 7], b (4): [0, 1, 2, 7]
+idx: 3, delta: 2, matching: false, a (5): [4, 5, 7, 8], b (2): [0, 1, 2, 3, 4, 5]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 3], b (1): [4]
+idx: 3, delta: 4, matching: false, a (7): [4, 7, 8], b (0): [0, 1, 3, 5, 7, 8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 7], b (5): [4, 5, 7, 8]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 3], b (3): [0, 1, 3, 4, 6, 7]
+idx: 4, delta: 3, matching: false, a (7): [4, 7, 8], b (2): [0, 1, 2, 3, 4, 5]
+idx: 4, delta: 4, matching: false, a (8): [3, 4, 5, 6, 7, 8], b (1): [4]
+idx: 4, delta: 5, matching: false, a (9): [4, 5, 6, 7, 8], b (0): [0, 1, 3, 5, 7, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [4, 5, 7, 8], b (6): [0, 1, 3]
+idx: 5, delta: 2, matching: false, a (7): [4, 7, 8], b (4): [0, 1, 2, 7]
+idx: 5, delta: 3, matching: false, a (8): [3, 4, 5, 6, 7, 8], b (3): [0, 1, 3, 4, 6, 7]
+idx: 5, delta: 4, matching: false, a (9): [4, 5, 6, 7, 8], b (2): [0, 1, 2, 3, 4, 5]
+idx: 5, delta: 5, matching: false, a (10): [4, 7, 8], b (1): [4]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 3], b (7): [4, 7, 8]
+idx: 6, delta: 2, matching: false, a (8): [3, 4, 5, 6, 7, 8], b (5): [4, 5, 7, 8]
+idx: 6, delta: 3, matching: false, a (9): [4, 5, 6, 7, 8], b (4): [0, 1, 2, 7]
+idx: 6, delta: 4, matching: false, a (10): [4, 7, 8], b (3): [0, 1, 3, 4, 6, 7]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [4, 7, 8], b (8): [3, 4, 5, 6, 7, 8]
+idx: 7, delta: 2, matching: false, a (9): [4, 5, 6, 7, 8], b (6): [0, 1, 3]
+idx: 7, delta: 3, matching: false, a (10): [4, 7, 8], b (5): [4, 5, 7, 8]
+idx: 7, delta: 3 --- found smudge!
+idx: 7 --- EXITING WITH true
+##.#.#.##
+....#....
+######...
+##.##.##.
+###....#.
+....##.##
+##.#.....
+....#..##
+...######
+....#####
+....#..##
+800 (vert: 0, horiz: 8)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 4, 5, 7, 8, 9], b (1): [1, 2, 6, 7, 10, 12, 13]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 6, 7, 10, 12, 13], b (2): [0, 3, 5, 6, 8, 9, 10]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 4, 6, 8, 9, 12, 13], b (0): [0, 1, 4, 5, 7, 8, 9]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 5, 6, 8, 9, 10], b (3): [2, 3, 4, 6, 8, 9, 12, 13]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 5, 6, 7, 8, 12, 13], b (1): [1, 2, 6, 7, 10, 12, 13]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 4, 5, 8, 9, 11, 14], b (0): [0, 1, 4, 5, 7, 8, 9]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 3, 4, 6, 8, 9, 12, 13], b (4): [0, 1, 3, 5, 6, 7, 8, 12, 13]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 4, 5, 8, 9, 11, 14], b (2): [0, 3, 5, 6, 8, 9, 10]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 5, 7, 10, 11, 14], b (1): [1, 2, 6, 7, 10, 12, 13]
+idx: 3, delta: 4, matching: false, a (7): [4, 8, 9, 11, 12, 13, 14], b (0): [0, 1, 4, 5, 7, 8, 9]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3, 5, 6, 7, 8, 12, 13], b (5): [1, 2, 4, 5, 8, 9, 11, 14]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 5, 7, 10, 11, 14], b (3): [2, 3, 4, 6, 8, 9, 12, 13]
+idx: 4, delta: 3, matching: false, a (7): [4, 8, 9, 11, 12, 13, 14], b (2): [0, 3, 5, 6, 8, 9, 10]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 4, 6, 7, 8, 9, 10], b (1): [1, 2, 6, 7, 10, 12, 13]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 3, 5, 6, 10, 11, 13, 14], b (0): [0, 1, 4, 5, 7, 8, 9]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 4, 5, 8, 9, 11, 14], b (6): [0, 1, 2, 5, 7, 10, 11, 14]
+idx: 5, delta: 2, matching: false, a (7): [4, 8, 9, 11, 12, 13, 14], b (4): [0, 1, 3, 5, 6, 7, 8, 12, 13]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 4, 6, 7, 8, 9, 10], b (3): [2, 3, 4, 6, 8, 9, 12, 13]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 3, 5, 6, 10, 11, 13, 14], b (2): [0, 3, 5, 6, 8, 9, 10]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 2, 3, 5, 6, 9], b (1): [1, 2, 6, 7, 10, 12, 13]
+idx: 5, delta: 6, matching: false, a (11): [3, 4, 5, 6, 7, 9, 11, 14], b (0): [0, 1, 4, 5, 7, 8, 9]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 5, 7, 10, 11, 14], b (7): [4, 8, 9, 11, 12, 13, 14]
+idx: 6, delta: 2, matching: false, a (8): [0, 2, 4, 6, 7, 8, 9, 10], b (5): [1, 2, 4, 5, 8, 9, 11, 14]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 3, 5, 6, 10, 11, 13, 14], b (4): [0, 1, 3, 5, 6, 7, 8, 12, 13]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 2, 3, 5, 6, 9], b (3): [2, 3, 4, 6, 8, 9, 12, 13]
+idx: 6, delta: 5, matching: false, a (11): [3, 4, 5, 6, 7, 9, 11, 14], b (2): [0, 3, 5, 6, 8, 9, 10]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 2, 4, 6, 8, 9, 11, 12, 13, 14], b (1): [1, 2, 6, 7, 10, 12, 13]
+idx: 6, delta: 7, matching: false, a (13): [2, 3, 4, 6, 7, 11, 14], b (0): [0, 1, 4, 5, 7, 8, 9]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [4, 8, 9, 11, 12, 13, 14], b (8): [0, 2, 4, 6, 7, 8, 9, 10]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 2, 3, 5, 6, 10, 11, 13, 14], b (6): [0, 1, 2, 5, 7, 10, 11, 14]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 2, 3, 5, 6, 9], b (5): [1, 2, 4, 5, 8, 9, 11, 14]
+idx: 7, delta: 4, matching: false, a (11): [3, 4, 5, 6, 7, 9, 11, 14], b (4): [0, 1, 3, 5, 6, 7, 8, 12, 13]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 2, 4, 6, 8, 9, 11, 12, 13, 14], b (3): [2, 3, 4, 6, 8, 9, 12, 13]
+idx: 7, delta: 6, matching: false, a (13): [2, 3, 4, 6, 7, 11, 14], b (2): [0, 3, 5, 6, 8, 9, 10]
+idx: 7, delta: 7, matching: false, a (14): [2, 3, 4, 8], b (1): [1, 2, 6, 7, 10, 12, 13]
+idx: 7, delta: 8, matching: false, a (15): [2, 4, 7, 8, 9, 10, 12, 13], b (0): [0, 1, 4, 5, 7, 8, 9]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 2, 4, 6, 7, 8, 9, 10], b (9): [0, 1, 2, 3, 5, 6, 10, 11, 13, 14]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 2, 3, 5, 6, 9], b (7): [4, 8, 9, 11, 12, 13, 14]
+idx: 8, delta: 3, matching: false, a (11): [3, 4, 5, 6, 7, 9, 11, 14], b (6): [0, 1, 2, 5, 7, 10, 11, 14]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 2, 4, 6, 8, 9, 11, 12, 13, 14], b (5): [1, 2, 4, 5, 8, 9, 11, 14]
+idx: 8, delta: 5, matching: false, a (13): [2, 3, 4, 6, 7, 11, 14], b (4): [0, 1, 3, 5, 6, 7, 8, 12, 13]
+idx: 8, delta: 6, matching: false, a (14): [2, 3, 4, 8], b (3): [2, 3, 4, 6, 8, 9, 12, 13]
+idx: 8, delta: 7, matching: false, a (15): [2, 4, 7, 8, 9, 10, 12, 13], b (2): [0, 3, 5, 6, 8, 9, 10]
+idx: 8, delta: 8, matching: false, a (16): [2, 4, 7, 8, 9, 10, 12, 13], b (1): [1, 2, 6, 7, 10, 12, 13]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 2, 3, 5, 6, 10, 11, 13, 14], b (10): [0, 1, 2, 3, 5, 6, 9]
+idx: 9, delta: 2, matching: false, a (11): [3, 4, 5, 6, 7, 9, 11, 14], b (8): [0, 2, 4, 6, 7, 8, 9, 10]
+idx: 9, delta: 3, matching: false, a (12): [0, 1, 2, 4, 6, 8, 9, 11, 12, 13, 14], b (7): [4, 8, 9, 11, 12, 13, 14]
+idx: 9, delta: 4, matching: false, a (13): [2, 3, 4, 6, 7, 11, 14], b (6): [0, 1, 2, 5, 7, 10, 11, 14]
+idx: 9, delta: 5, matching: false, a (14): [2, 3, 4, 8], b (5): [1, 2, 4, 5, 8, 9, 11, 14]
+idx: 9, delta: 6, matching: false, a (15): [2, 4, 7, 8, 9, 10, 12, 13], b (4): [0, 1, 3, 5, 6, 7, 8, 12, 13]
+idx: 9, delta: 7, matching: false, a (16): [2, 4, 7, 8, 9, 10, 12, 13], b (3): [2, 3, 4, 6, 8, 9, 12, 13]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 2, 3, 5, 6, 9], b (11): [3, 4, 5, 6, 7, 9, 11, 14]
+idx: 10, delta: 2, matching: false, a (12): [0, 1, 2, 4, 6, 8, 9, 11, 12, 13, 14], b (9): [0, 1, 2, 3, 5, 6, 10, 11, 13, 14]
+idx: 10, delta: 3, matching: false, a (13): [2, 3, 4, 6, 7, 11, 14], b (8): [0, 2, 4, 6, 7, 8, 9, 10]
+idx: 10, delta: 4, matching: false, a (14): [2, 3, 4, 8], b (7): [4, 8, 9, 11, 12, 13, 14]
+idx: 10, delta: 5, matching: false, a (15): [2, 4, 7, 8, 9, 10, 12, 13], b (6): [0, 1, 2, 5, 7, 10, 11, 14]
+idx: 10, delta: 6, matching: false, a (16): [2, 4, 7, 8, 9, 10, 12, 13], b (5): [1, 2, 4, 5, 8, 9, 11, 14]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [3, 4, 5, 6, 7, 9, 11, 14], b (12): [0, 1, 2, 4, 6, 8, 9, 11, 12, 13, 14]
+idx: 11, delta: 2, matching: false, a (13): [2, 3, 4, 6, 7, 11, 14], b (10): [0, 1, 2, 3, 5, 6, 9]
+idx: 11, delta: 3, matching: false, a (14): [2, 3, 4, 8], b (9): [0, 1, 2, 3, 5, 6, 10, 11, 13, 14]
+idx: 11, delta: 4, matching: false, a (15): [2, 4, 7, 8, 9, 10, 12, 13], b (8): [0, 2, 4, 6, 7, 8, 9, 10]
+idx: 11, delta: 5, matching: false, a (16): [2, 4, 7, 8, 9, 10, 12, 13], b (7): [4, 8, 9, 11, 12, 13, 14]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 1, 2, 4, 6, 8, 9, 11, 12, 13, 14], b (13): [2, 3, 4, 6, 7, 11, 14]
+idx: 12, delta: 2, matching: false, a (14): [2, 3, 4, 8], b (11): [3, 4, 5, 6, 7, 9, 11, 14]
+idx: 12, delta: 3, matching: false, a (15): [2, 4, 7, 8, 9, 10, 12, 13], b (10): [0, 1, 2, 3, 5, 6, 9]
+idx: 12, delta: 4, matching: false, a (16): [2, 4, 7, 8, 9, 10, 12, 13], b (9): [0, 1, 2, 3, 5, 6, 10, 11, 13, 14]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [2, 3, 4, 6, 7, 11, 14], b (14): [2, 3, 4, 8]
+idx: 13, delta: 2, matching: false, a (15): [2, 4, 7, 8, 9, 10, 12, 13], b (12): [0, 1, 2, 4, 6, 8, 9, 11, 12, 13, 14]
+idx: 13, delta: 3, matching: false, a (16): [2, 4, 7, 8, 9, 10, 12, 13], b (11): [3, 4, 5, 6, 7, 9, 11, 14]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [2, 3, 4, 8], b (15): [2, 4, 7, 8, 9, 10, 12, 13]
+idx: 14, delta: 2, matching: false, a (16): [2, 4, 7, 8, 9, 10, 12, 13], b (13): [2, 3, 4, 6, 7, 11, 14]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: true, a (15): [2, 4, 7, 8, 9, 10, 12, 13], b (16): [2, 4, 7, 8, 9, 10, 12, 13]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 4, 6, 8, 9, 10, 12], b (1): [0, 1, 4, 5, 6, 9, 10, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 4, 5, 6, 9, 10, 12], b (2): [1, 3, 5, 6, 8, 9, 10, 12, 13, 14, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 4, 9, 10, 11, 13, 14], b (0): [0, 2, 4, 6, 8, 9, 10, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 3, 5, 6, 8, 9, 10, 12, 13, 14, 15, 16], b (3): [2, 3, 4, 9, 10, 11, 13, 14]
+idx: 2, delta: 2, matching: false, a (4): [0, 3, 5, 7, 8, 11, 12, 13, 14, 15, 16], b (1): [0, 1, 4, 5, 6, 9, 10, 12]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 4, 5, 6, 9, 10, 11], b (0): [0, 2, 4, 6, 8, 9, 10, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 3, 4, 9, 10, 11, 13, 14], b (4): [0, 3, 5, 7, 8, 11, 12, 13, 14, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 4, 5, 6, 9, 10, 11], b (2): [1, 3, 5, 6, 8, 9, 10, 12, 13, 14, 15, 16]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 3, 4, 8, 9, 10, 11, 12, 13], b (1): [0, 1, 4, 5, 6, 9, 10, 12]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 4, 6, 8, 11, 13, 15, 16], b (0): [0, 2, 4, 6, 8, 9, 10, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 3, 5, 7, 8, 11, 12, 13, 14, 15, 16], b (5): [0, 2, 4, 5, 6, 9, 10, 11]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 3, 4, 8, 9, 10, 11, 12, 13], b (3): [2, 3, 4, 9, 10, 11, 13, 14]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 4, 6, 8, 11, 13, 15, 16], b (2): [1, 3, 5, 6, 8, 9, 10, 12, 13, 14, 15, 16]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 3, 4, 5, 7, 8, 12, 14, 15, 16], b (1): [0, 1, 4, 5, 6, 9, 10, 12]
+idx: 4, delta: 5, matching: false, a (9): [0, 2, 3, 5, 7, 8, 10, 11, 12, 15, 16], b (0): [0, 2, 4, 6, 8, 9, 10, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 4, 5, 6, 9, 10, 11], b (6): [1, 2, 3, 4, 8, 9, 10, 11, 12, 13]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 4, 6, 8, 11, 13, 15, 16], b (4): [0, 3, 5, 7, 8, 11, 12, 13, 14, 15, 16]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 3, 4, 5, 7, 8, 12, 14, 15, 16], b (3): [2, 3, 4, 9, 10, 11, 13, 14]
+idx: 5, delta: 4, matching: false, a (9): [0, 2, 3, 5, 7, 8, 10, 11, 12, 15, 16], b (2): [1, 3, 5, 6, 8, 9, 10, 12, 13, 14, 15, 16]
+idx: 5, delta: 5, matching: false, a (10): [1, 2, 6, 8, 9, 15, 16], b (1): [0, 1, 4, 5, 6, 9, 10, 12]
+idx: 5, delta: 6, matching: false, a (11): [5, 6, 7, 9, 11, 12, 13], b (0): [0, 2, 4, 6, 8, 9, 10, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 3, 4, 8, 9, 10, 11, 12, 13], b (7): [0, 1, 4, 6, 8, 11, 13, 15, 16]
+idx: 6, delta: 2, matching: false, a (8): [0, 2, 3, 4, 5, 7, 8, 12, 14, 15, 16], b (5): [0, 2, 4, 5, 6, 9, 10, 11]
+idx: 6, delta: 3, matching: false, a (9): [0, 2, 3, 5, 7, 8, 10, 11, 12, 15, 16], b (4): [0, 3, 5, 7, 8, 11, 12, 13, 14, 15, 16]
+idx: 6, delta: 4, matching: false, a (10): [1, 2, 6, 8, 9, 15, 16], b (3): [2, 3, 4, 9, 10, 11, 13, 14]
+idx: 6, delta: 5, matching: false, a (11): [5, 6, 7, 9, 11, 12, 13], b (2): [1, 3, 5, 6, 8, 9, 10, 12, 13, 14, 15, 16]
+idx: 6, delta: 6, matching: false, a (12): [1, 3, 4, 7, 12, 15, 16], b (1): [0, 1, 4, 5, 6, 9, 10, 12]
+idx: 6, delta: 7, matching: false, a (13): [1, 3, 4, 7, 9, 12, 15, 16], b (0): [0, 2, 4, 6, 8, 9, 10, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 4, 6, 8, 11, 13, 15, 16], b (8): [0, 2, 3, 4, 5, 7, 8, 12, 14, 15, 16]
+idx: 7, delta: 2, matching: false, a (9): [0, 2, 3, 5, 7, 8, 10, 11, 12, 15, 16], b (6): [1, 2, 3, 4, 8, 9, 10, 11, 12, 13]
+idx: 7, delta: 3, matching: false, a (10): [1, 2, 6, 8, 9, 15, 16], b (5): [0, 2, 4, 5, 6, 9, 10, 11]
+idx: 7, delta: 4, matching: false, a (11): [5, 6, 7, 9, 11, 12, 13], b (4): [0, 3, 5, 7, 8, 11, 12, 13, 14, 15, 16]
+idx: 7, delta: 5, matching: false, a (12): [1, 3, 4, 7, 12, 15, 16], b (3): [2, 3, 4, 9, 10, 11, 13, 14]
+idx: 7, delta: 6, matching: false, a (13): [1, 3, 4, 7, 9, 12, 15, 16], b (2): [1, 3, 5, 6, 8, 9, 10, 12, 13, 14, 15, 16]
+idx: 7, delta: 7, matching: false, a (14): [5, 6, 7, 9, 11, 12, 13], b (1): [0, 1, 4, 5, 6, 9, 10, 12]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 2, 3, 4, 5, 7, 8, 12, 14, 15, 16], b (9): [0, 2, 3, 5, 7, 8, 10, 11, 12, 15, 16]
+idx: 8, delta: 2, matching: false, a (10): [1, 2, 6, 8, 9, 15, 16], b (7): [0, 1, 4, 6, 8, 11, 13, 15, 16]
+idx: 8, delta: 3, matching: false, a (11): [5, 6, 7, 9, 11, 12, 13], b (6): [1, 2, 3, 4, 8, 9, 10, 11, 12, 13]
+idx: 8, delta: 4, matching: false, a (12): [1, 3, 4, 7, 12, 15, 16], b (5): [0, 2, 4, 5, 6, 9, 10, 11]
+idx: 8, delta: 5, matching: false, a (13): [1, 3, 4, 7, 9, 12, 15, 16], b (4): [0, 3, 5, 7, 8, 11, 12, 13, 14, 15, 16]
+idx: 8, delta: 6, matching: false, a (14): [5, 6, 7, 9, 11, 12, 13], b (3): [2, 3, 4, 9, 10, 11, 13, 14]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 2, 3, 5, 7, 8, 10, 11, 12, 15, 16], b (10): [1, 2, 6, 8, 9, 15, 16]
+idx: 9, delta: 2, matching: false, a (11): [5, 6, 7, 9, 11, 12, 13], b (8): [0, 2, 3, 4, 5, 7, 8, 12, 14, 15, 16]
+idx: 9, delta: 3, matching: false, a (12): [1, 3, 4, 7, 12, 15, 16], b (7): [0, 1, 4, 6, 8, 11, 13, 15, 16]
+idx: 9, delta: 4, matching: false, a (13): [1, 3, 4, 7, 9, 12, 15, 16], b (6): [1, 2, 3, 4, 8, 9, 10, 11, 12, 13]
+idx: 9, delta: 5, matching: false, a (14): [5, 6, 7, 9, 11, 12, 13], b (5): [0, 2, 4, 5, 6, 9, 10, 11]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [1, 2, 6, 8, 9, 15, 16], b (11): [5, 6, 7, 9, 11, 12, 13]
+idx: 10, delta: 2, matching: false, a (12): [1, 3, 4, 7, 12, 15, 16], b (9): [0, 2, 3, 5, 7, 8, 10, 11, 12, 15, 16]
+idx: 10, delta: 3, matching: false, a (13): [1, 3, 4, 7, 9, 12, 15, 16], b (8): [0, 2, 3, 4, 5, 7, 8, 12, 14, 15, 16]
+idx: 10, delta: 4, matching: false, a (14): [5, 6, 7, 9, 11, 12, 13], b (7): [0, 1, 4, 6, 8, 11, 13, 15, 16]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [5, 6, 7, 9, 11, 12, 13], b (12): [1, 3, 4, 7, 12, 15, 16]
+idx: 11, delta: 2, matching: false, a (13): [1, 3, 4, 7, 9, 12, 15, 16], b (10): [1, 2, 6, 8, 9, 15, 16]
+idx: 11, delta: 3, matching: false, a (14): [5, 6, 7, 9, 11, 12, 13], b (9): [0, 2, 3, 5, 7, 8, 10, 11, 12, 15, 16]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [1, 3, 4, 7, 12, 15, 16], b (13): [1, 3, 4, 7, 9, 12, 15, 16]
+idx: 12, delta: 0 --- found smudge!
+idx: 12, delta: 2, matching: true, a (14): [5, 6, 7, 9, 11, 12, 13], b (11): [5, 6, 7, 9, 11, 12, 13]
+idx: 12 --- EXITING WITH true
+#.#.#.#.###.#....
+##..###..##.#....
+.#.#.##.###.#####
+..###....###.##..
+#..#.#.##..######
+#.#.###..###.....
+.####...######...
+##..#.#.#..#.#.##
+#.####.##...#.###
+#.##.#.##.###..##
+.##...#.##.....##
+.....###.#.###...
+.#.##..#....#..##
+.#.##..#.#..#..##
+.....###.#.###...
+1300 (vert: 0, horiz: 13)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 4, 6, 11], b (1): [0, 4, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 4, 10], b (2): [0, 1, 2, 8, 9]
+idx: 1, delta: 2, matching: false, a (3): [3, 4, 6, 7, 10, 11], b (0): [0, 2, 4, 6, 11]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 8, 9], b (3): [3, 4, 6, 7, 10, 11]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 7, 8, 9, 10], b (1): [0, 4, 10]
+idx: 2, delta: 3, matching: false, a (5): [2, 6, 7, 8, 9, 10, 11], b (0): [0, 2, 4, 6, 11]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [3, 4, 6, 7, 10, 11], b (4): [1, 2, 7, 8, 9, 10]
+idx: 3, delta: 2, matching: false, a (5): [2, 6, 7, 8, 9, 10, 11], b (2): [0, 1, 2, 8, 9]
+idx: 3, delta: 3, matching: false, a (6): [0, 5, 6, 11, 12], b (1): [0, 4, 10]
+idx: 3, delta: 4, matching: false, a (7): [3, 4, 8, 9], b (0): [0, 2, 4, 6, 11]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 7, 8, 9, 10], b (5): [2, 6, 7, 8, 9, 10, 11]
+idx: 4, delta: 2, matching: false, a (6): [0, 5, 6, 11, 12], b (3): [3, 4, 6, 7, 10, 11]
+idx: 4, delta: 3, matching: false, a (7): [3, 4, 8, 9], b (2): [0, 1, 2, 8, 9]
+idx: 4, delta: 4, matching: false, a (8): [1, 3, 7, 8, 9, 10], b (1): [0, 4, 10]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 3, 4, 5, 12], b (0): [0, 2, 4, 6, 11]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 6, 7, 8, 9, 10, 11], b (6): [0, 5, 6, 11, 12]
+idx: 5, delta: 2, matching: false, a (7): [3, 4, 8, 9], b (4): [1, 2, 7, 8, 9, 10]
+idx: 5, delta: 3, matching: false, a (8): [1, 3, 7, 8, 9, 10], b (3): [3, 4, 6, 7, 10, 11]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 3, 4, 5, 12], b (2): [0, 1, 2, 8, 9]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 3, 4, 5, 12], b (1): [0, 4, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 5, 6, 11, 12], b (7): [3, 4, 8, 9]
+idx: 6, delta: 2, matching: false, a (8): [1, 3, 7, 8, 9, 10], b (5): [2, 6, 7, 8, 9, 10, 11]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 3, 4, 5, 12], b (4): [1, 2, 7, 8, 9, 10]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 3, 4, 5, 12], b (3): [3, 4, 6, 7, 10, 11]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [3, 4, 8, 9], b (8): [1, 3, 7, 8, 9, 10]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 3, 4, 5, 12], b (6): [0, 5, 6, 11, 12]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 3, 4, 5, 12], b (5): [2, 6, 7, 8, 9, 10, 11]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [1, 3, 7, 8, 9, 10], b (9): [0, 1, 3, 4, 5, 12]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 3, 4, 5, 12], b (7): [3, 4, 8, 9]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: true, a (9): [0, 1, 3, 4, 5, 12], b (10): [0, 1, 3, 4, 5, 12]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 6, 9, 10], b (1): [2, 4, 8, 9, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 4, 8, 9, 10], b (2): [0, 2, 4, 5]
+idx: 1, delta: 2, matching: false, a (3): [3, 7, 8, 9, 10], b (0): [0, 1, 2, 6, 9, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 4, 5], b (3): [3, 7, 8, 9, 10]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 7, 9, 10], b (1): [2, 4, 8, 9, 10]
+idx: 2, delta: 3, matching: false, a (5): [6, 9, 10], b (0): [0, 1, 2, 6, 9, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [3, 7, 8, 9, 10], b (4): [0, 1, 3, 7, 9, 10]
+idx: 3, delta: 2, matching: false, a (5): [6, 9, 10], b (2): [0, 2, 4, 5]
+idx: 3, delta: 3, matching: false, a (6): [0, 3, 5, 6], b (1): [2, 4, 8, 9, 10]
+idx: 3, delta: 4, matching: false, a (7): [3, 4, 5, 8], b (0): [0, 1, 2, 6, 9, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3, 7, 9, 10], b (5): [6, 9, 10]
+idx: 4, delta: 2, matching: false, a (6): [0, 3, 5, 6], b (3): [3, 7, 8, 9, 10]
+idx: 4, delta: 3, matching: false, a (7): [3, 4, 5, 8], b (2): [0, 2, 4, 5]
+idx: 4, delta: 4, matching: false, a (8): [2, 4, 5, 7, 8], b (1): [2, 4, 8, 9, 10]
+idx: 4, delta: 5, matching: false, a (9): [2, 4, 5, 7, 8], b (0): [0, 1, 2, 6, 9, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [6, 9, 10], b (6): [0, 3, 5, 6]
+idx: 5, delta: 2, matching: false, a (7): [3, 4, 5, 8], b (4): [0, 1, 3, 7, 9, 10]
+idx: 5, delta: 3, matching: false, a (8): [2, 4, 5, 7, 8], b (3): [3, 7, 8, 9, 10]
+idx: 5, delta: 4, matching: false, a (9): [2, 4, 5, 7, 8], b (2): [0, 2, 4, 5]
+idx: 5, delta: 5, matching: false, a (10): [1, 3, 4, 5, 8], b (1): [2, 4, 8, 9, 10]
+idx: 5, delta: 6, matching: false, a (11): [0, 3, 5, 6], b (0): [0, 1, 2, 6, 9, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 3, 5, 6], b (7): [3, 4, 5, 8]
+idx: 6, delta: 2, matching: false, a (8): [2, 4, 5, 7, 8], b (5): [6, 9, 10]
+idx: 6, delta: 3, matching: false, a (9): [2, 4, 5, 7, 8], b (4): [0, 1, 3, 7, 9, 10]
+idx: 6, delta: 4, matching: false, a (10): [1, 3, 4, 5, 8], b (3): [3, 7, 8, 9, 10]
+idx: 6, delta: 5, matching: false, a (11): [0, 3, 5, 6], b (2): [0, 2, 4, 5]
+idx: 6, delta: 6, matching: false, a (12): [6, 9, 10], b (1): [2, 4, 8, 9, 10]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [3, 4, 5, 8], b (8): [2, 4, 5, 7, 8]
+idx: 7, delta: 2, matching: false, a (9): [2, 4, 5, 7, 8], b (6): [0, 3, 5, 6]
+idx: 7, delta: 3, matching: false, a (10): [1, 3, 4, 5, 8], b (5): [6, 9, 10]
+idx: 7, delta: 4, matching: false, a (11): [0, 3, 5, 6], b (4): [0, 1, 3, 7, 9, 10]
+idx: 7, delta: 5, matching: false, a (12): [6, 9, 10], b (3): [3, 7, 8, 9, 10]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: true, a (8): [2, 4, 5, 7, 8], b (9): [2, 4, 5, 7, 8]
+idx: 8, delta: 2, matching: false, a (10): [1, 3, 4, 5, 8], b (7): [3, 4, 5, 8]
+idx: 8, delta: 2 --- found smudge!
+idx: 8, delta: 3, matching: true, a (11): [0, 3, 5, 6], b (6): [0, 3, 5, 6]
+idx: 8, delta: 4, matching: true, a (12): [6, 9, 10], b (5): [6, 9, 10]
+idx: 8 --- EXITING WITH true
+###...#..##
+..#.#...###
+#.#.##.....
+...#...####
+##.#...#.##
+......#..##
+#..#.##....
+...###..#..
+..#.##.##..
+..#.##.##..
+.#.###..#..
+#..#.##....
+......#..##
+900 (vert: 0, horiz: 9)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16], b (1): [0, 5, 15, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 5, 15, 16], b (2): [2, 6, 7, 8, 9, 13]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 5, 6, 9, 10, 12, 13, 14, 15, 16], b (0): [0, 1, 3, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 6, 7, 8, 9, 13], b (3): [0, 1, 2, 3, 5, 6, 9, 10, 12, 13, 14, 15, 16]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 4, 5, 7, 8, 10, 11, 14, 15, 16], b (1): [0, 5, 15, 16]
+idx: 2, delta: 3, matching: false, a (5): [0, 15, 16], b (0): [0, 1, 3, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 3, 5, 6, 9, 10, 12, 13, 14, 15, 16], b (4): [0, 1, 4, 5, 7, 8, 10, 11, 14, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [0, 15, 16], b (2): [2, 6, 7, 8, 9, 13]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 4, 6, 9, 11, 13, 15, 16], b (1): [0, 5, 15, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 4, 5, 7, 8, 10, 11, 14, 15, 16], b (5): [0, 15, 16]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 4, 6, 9, 11, 13, 15, 16], b (3): [0, 1, 2, 3, 5, 6, 9, 10, 12, 13, 14, 15, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 15, 16], b (6): [0, 2, 4, 6, 9, 11, 13, 15, 16]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 4, 5, 6], b (1): [0, 3, 4]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 3, 4], b (2): [2, 3, 6]
+idx: 1, delta: 2, matching: false, a (3): [0, 3], b (0): [0, 1, 3, 4, 5, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 3, 6], b (3): [0, 3]
+idx: 2, delta: 2, matching: false, a (4): [4, 6], b (1): [0, 3, 4]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 3, 4], b (0): [0, 1, 3, 4, 5, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 3], b (4): [4, 6]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 3, 4], b (2): [2, 3, 6]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 3, 6], b (1): [0, 3, 4]
+idx: 3, delta: 4, matching: false, a (7): [0, 2, 4], b (0): [0, 1, 3, 4, 5, 6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [4, 6], b (5): [0, 1, 3, 4]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 3, 6], b (3): [0, 3]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 4], b (2): [2, 3, 6]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 4], b (1): [0, 3, 4]
+idx: 4, delta: 5, matching: false, a (9): [0, 2, 3, 6], b (0): [0, 1, 3, 4, 5, 6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 3, 4], b (6): [0, 2, 3, 6]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 4], b (4): [4, 6]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 4], b (3): [0, 3]
+idx: 5, delta: 4, matching: false, a (9): [0, 2, 3, 6], b (2): [2, 3, 6]
+idx: 5, delta: 4 --- found smudge!
+idx: 5, delta: 5, matching: true, a (10): [0, 3, 4], b (1): [0, 3, 4]
+idx: 5, delta: 6, matching: false, a (11): [4, 6], b (0): [0, 1, 3, 4, 5, 6]
+idx: 5, delta: 6 --- found smudge twice!
+idx: 6, delta: 0, matching: false, a (6): [0, 2, 3, 6], b (7): [0, 2, 4]
+idx: 6, delta: 2, matching: false, a (8): [0, 2, 4], b (5): [0, 1, 3, 4]
+idx: 6, delta: 3, matching: false, a (9): [0, 2, 3, 6], b (4): [4, 6]
+idx: 6, delta: 4, matching: false, a (10): [0, 3, 4], b (3): [0, 3]
+idx: 6, delta: 4 --- found smudge!
+idx: 6, delta: 5, matching: false, a (11): [4, 6], b (2): [2, 3, 6]
+idx: 6, delta: 5 --- found smudge twice!
+idx: 7, delta: 0, matching: true, a (7): [0, 2, 4], b (8): [0, 2, 4]
+idx: 7, delta: 2, matching: true, a (9): [0, 2, 3, 6], b (6): [0, 2, 3, 6]
+idx: 7, delta: 3, matching: false, a (10): [0, 3, 4], b (5): [0, 1, 3, 4]
+idx: 7, delta: 3 --- found smudge!
+idx: 7, delta: 4, matching: true, a (11): [4, 6], b (4): [4, 6]
+idx: 7, delta: 5, matching: true, a (12): [0, 3], b (3): [0, 3]
+idx: 7, delta: 6, matching: true, a (13): [2, 3, 6], b (2): [2, 3, 6]
+idx: 7, delta: 7, matching: true, a (14): [0, 3, 4], b (1): [0, 3, 4]
+idx: 7, delta: 8, matching: true, a (15): [0, 1, 3, 4, 5, 6], b (0): [0, 1, 3, 4, 5, 6]
+idx: 7 --- EXITING WITH true
+##.####
+#..##..
+..##..#
+#..#...
+....#.#
+##.##..
+#.##..#
+#.#.#..
+#.#.#..
+#.##..#
+#..##..
+....#.#
+#..#...
+..##..#
+#..##..
+##.####
+##.####
+800 (vert: 0, horiz: 8)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 4, 5, 6, 7, 9], b (1): [1, 3, 4, 7, 8, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 3, 4, 7, 8, 10], b (2): [0, 3, 5, 6, 8]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 5, 6, 9], b (0): [0, 2, 4, 5, 6, 7, 9]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 5, 6, 8], b (3): [0, 2, 5, 6, 9]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 4, 7, 9, 10], b (1): [1, 3, 4, 7, 8, 10]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 4, 5, 6, 7, 9, 10], b (0): [0, 2, 4, 5, 6, 7, 9]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 5, 6, 9], b (4): [1, 2, 4, 7, 9, 10]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 4, 5, 6, 7, 9, 10], b (2): [0, 3, 5, 6, 8]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 4, 7, 10], b (1): [1, 3, 4, 7, 8, 10]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2, 9], b (0): [0, 2, 4, 5, 6, 7, 9]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 4, 7, 9, 10], b (5): [0, 1, 2, 4, 5, 6, 7, 9, 10]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 4, 7, 10], b (3): [0, 2, 5, 6, 9]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 2, 9], b (2): [0, 3, 5, 6, 8]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 3, 8, 9], b (1): [1, 3, 4, 7, 8, 10]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 3, 4, 7, 8, 10], b (0): [0, 2, 4, 5, 6, 7, 9]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 4, 5, 6, 7, 9, 10], b (6): [0, 1, 4, 7, 10]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2, 9], b (4): [1, 2, 4, 7, 9, 10]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 3, 8, 9], b (3): [0, 2, 5, 6, 9]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 3, 4, 7, 8, 10], b (2): [0, 3, 5, 6, 8]
+idx: 5, delta: 5, matching: false, a (10): [3, 4, 5, 6, 7, 8], b (1): [1, 3, 4, 7, 8, 10]
+idx: 5, delta: 6, matching: false, a (11): [0, 3, 4, 7, 8], b (0): [0, 2, 4, 5, 6, 7, 9]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 4, 7, 10], b (7): [0, 1, 2, 9]
+idx: 6, delta: 2, matching: false, a (8): [0, 2, 3, 8, 9], b (5): [0, 1, 2, 4, 5, 6, 7, 9, 10]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 3, 4, 7, 8, 10], b (4): [1, 2, 4, 7, 9, 10]
+idx: 6, delta: 4, matching: false, a (10): [3, 4, 5, 6, 7, 8], b (3): [0, 2, 5, 6, 9]
+idx: 6, delta: 5, matching: false, a (11): [0, 3, 4, 7, 8], b (2): [0, 3, 5, 6, 8]
+idx: 6, delta: 6, matching: false, a (12): [0, 2, 4, 5, 6, 7, 9], b (1): [1, 3, 4, 7, 8, 10]
+idx: 6, delta: 7, matching: true, a (13): [0, 2, 4, 5, 6, 7, 9], b (0): [0, 2, 4, 5, 6, 7, 9]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 2, 9], b (8): [0, 2, 3, 8, 9]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 3, 4, 7, 8, 10], b (6): [0, 1, 4, 7, 10]
+idx: 7, delta: 3, matching: false, a (10): [3, 4, 5, 6, 7, 8], b (5): [0, 1, 2, 4, 5, 6, 7, 9, 10]
+idx: 7, delta: 4, matching: false, a (11): [0, 3, 4, 7, 8], b (4): [1, 2, 4, 7, 9, 10]
+idx: 7, delta: 5, matching: false, a (12): [0, 2, 4, 5, 6, 7, 9], b (3): [0, 2, 5, 6, 9]
+idx: 7, delta: 6, matching: false, a (13): [0, 2, 4, 5, 6, 7, 9], b (2): [0, 3, 5, 6, 8]
+idx: 7, delta: 7, matching: false, a (14): [0, 3, 4, 7, 8], b (1): [1, 3, 4, 7, 8, 10]
+idx: 7, delta: 8, matching: false, a (15): [3, 4, 5, 6, 7, 8], b (0): [0, 2, 4, 5, 6, 7, 9]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 2, 3, 8, 9], b (9): [0, 1, 3, 4, 7, 8, 10]
+idx: 8, delta: 2, matching: false, a (10): [3, 4, 5, 6, 7, 8], b (7): [0, 1, 2, 9]
+idx: 8, delta: 3, matching: false, a (11): [0, 3, 4, 7, 8], b (6): [0, 1, 4, 7, 10]
+idx: 8, delta: 4, matching: false, a (12): [0, 2, 4, 5, 6, 7, 9], b (5): [0, 1, 2, 4, 5, 6, 7, 9, 10]
+idx: 8, delta: 5, matching: false, a (13): [0, 2, 4, 5, 6, 7, 9], b (4): [1, 2, 4, 7, 9, 10]
+idx: 8, delta: 6, matching: false, a (14): [0, 3, 4, 7, 8], b (3): [0, 2, 5, 6, 9]
+idx: 8, delta: 7, matching: false, a (15): [3, 4, 5, 6, 7, 8], b (2): [0, 3, 5, 6, 8]
+idx: 8, delta: 8, matching: false, a (16): [0, 1, 3, 4, 7, 8, 10], b (1): [1, 3, 4, 7, 8, 10]
+idx: 8, delta: 8 --- found smudge!
+idx: 8 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 3, 5, 6, 7, 8, 9, 11, 12, 13, 14, 16], b (1): [1, 4, 5, 6, 7, 9, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 4, 5, 6, 7, 9, 16], b (2): [0, 3, 4, 5, 7, 8, 12, 13]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 8, 9, 10, 11, 14, 15, 16], b (0): [0, 2, 3, 5, 6, 7, 8, 9, 11, 12, 13, 14, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 4, 5, 7, 8, 12, 13], b (3): [1, 2, 8, 9, 10, 11, 14, 15, 16]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16], b (1): [1, 4, 5, 6, 7, 9, 16]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 5, 10, 12, 13, 15], b (0): [0, 2, 3, 5, 6, 7, 8, 9, 11, 12, 13, 14, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 8, 9, 10, 11, 14, 15, 16], b (4): [0, 1, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 5, 10, 12, 13, 15], b (2): [0, 3, 4, 5, 7, 8, 12, 13]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 3, 5, 10, 12, 13, 15], b (1): [1, 4, 5, 6, 7, 9, 16]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16], b (0): [0, 2, 3, 5, 6, 7, 8, 9, 11, 12, 13, 14, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16], b (5): [0, 2, 3, 5, 10, 12, 13, 15]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 3, 5, 10, 12, 13, 15], b (3): [1, 2, 8, 9, 10, 11, 14, 15, 16]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16], b (2): [0, 3, 4, 5, 7, 8, 12, 13]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 8, 9, 10, 11, 14, 15, 16], b (1): [1, 4, 5, 6, 7, 9, 16]
+idx: 4, delta: 5, matching: false, a (9): [0, 3, 4, 5, 7, 8, 12, 13], b (0): [0, 2, 3, 5, 6, 7, 8, 9, 11, 12, 13, 14, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: true, a (5): [0, 2, 3, 5, 10, 12, 13, 15], b (6): [0, 2, 3, 5, 10, 12, 13, 15]
+idx: 5, delta: 2, matching: true, a (7): [0, 1, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16], b (4): [0, 1, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16]
+idx: 5, delta: 3, matching: true, a (8): [1, 2, 8, 9, 10, 11, 14, 15, 16], b (3): [1, 2, 8, 9, 10, 11, 14, 15, 16]
+idx: 5, delta: 4, matching: true, a (9): [0, 3, 4, 5, 7, 8, 12, 13], b (2): [0, 3, 4, 5, 7, 8, 12, 13]
+idx: 5, delta: 5, matching: false, a (10): [1, 4, 5, 6, 9, 16], b (1): [1, 4, 5, 6, 7, 9, 16]
+idx: 5, delta: 5 --- found smudge!
+idx: 5 --- EXITING WITH true
+#.##.#####.####.#
+.#..####.#......#
+#..###.##...##...
+.##.....####..###
+##..###..########
+#.##.#....#.##.#.
+#.##.#....#.##.#.
+##..###..########
+.##.....####..###
+#..###.##...##...
+.#..###..#......#
+609 (vert: 9, horiz: 6)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 3, 4, 6, 8, 9, 10], b (1): [0, 7]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 7], b (2): [0, 7, 8]
+idx: 1, delta: 0 --- found smudge!
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 3, 4, 5, 7, 9, 10], b (0): [1, 3, 4, 6, 8, 9, 10]
+idx: 1, delta: 2 --- found smudge twice!
+idx: 2, delta: 0, matching: false, a (2): [0, 7, 8], b (3): [0, 2, 3, 4, 5, 7, 9, 10]
+idx: 2, delta: 2, matching: false, a (4): [1, 3, 4, 6, 9, 10], b (1): [0, 7]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 3, 4, 5, 6, 8, 9, 10], b (0): [1, 3, 4, 6, 8, 9, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 3, 4, 5, 7, 9, 10], b (4): [1, 3, 4, 6, 9, 10]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 3, 4, 5, 6, 8, 9, 10], b (2): [0, 7, 8]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 5, 6, 7, 9, 10], b (1): [0, 7]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 5, 6, 7, 8, 9, 10], b (0): [1, 3, 4, 6, 8, 9, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 3, 4, 6, 9, 10], b (5): [1, 2, 3, 4, 5, 6, 8, 9, 10]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 5, 6, 7, 9, 10], b (3): [0, 2, 3, 4, 5, 7, 9, 10]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 5, 6, 7, 8, 9, 10], b (2): [0, 7, 8]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 5, 7, 8], b (1): [0, 7]
+idx: 4, delta: 5, matching: false, a (9): [0, 3, 4, 7, 8], b (0): [1, 3, 4, 6, 8, 9, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 3, 4, 5, 6, 8, 9, 10], b (6): [0, 1, 2, 5, 6, 7, 9, 10]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 5, 6, 7, 8, 9, 10], b (4): [1, 3, 4, 6, 9, 10]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 5, 7, 8], b (3): [0, 2, 3, 4, 5, 7, 9, 10]
+idx: 5, delta: 4, matching: false, a (9): [0, 3, 4, 7, 8], b (2): [0, 7, 8]
+idx: 5, delta: 5, matching: false, a (10): [3, 4, 8, 9, 10], b (1): [0, 7]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6, 7], b (0): [1, 3, 4, 6, 8, 9, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 5, 6, 7, 9, 10], b (7): [1, 2, 5, 6, 7, 8, 9, 10]
+idx: 6, delta: 2, matching: false, a (8): [0, 2, 5, 7, 8], b (5): [1, 2, 3, 4, 5, 6, 8, 9, 10]
+idx: 6, delta: 3, matching: false, a (9): [0, 3, 4, 7, 8], b (4): [1, 3, 4, 6, 9, 10]
+idx: 6, delta: 4, matching: false, a (10): [3, 4, 8, 9, 10], b (3): [0, 2, 3, 4, 5, 7, 9, 10]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6, 7], b (2): [0, 7, 8]
+idx: 6, delta: 6, matching: false, a (12): [1, 3, 4, 6], b (1): [0, 7]
+idx: 6, delta: 7, matching: false, a (13): [0, 2, 3, 4, 5, 7, 8, 9, 10], b (0): [1, 3, 4, 6, 8, 9, 10]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 5, 6, 7, 8, 9, 10], b (8): [0, 2, 5, 7, 8]
+idx: 7, delta: 2, matching: false, a (9): [0, 3, 4, 7, 8], b (6): [0, 1, 2, 5, 6, 7, 9, 10]
+idx: 7, delta: 3, matching: false, a (10): [3, 4, 8, 9, 10], b (5): [1, 2, 3, 4, 5, 6, 8, 9, 10]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6, 7], b (4): [1, 3, 4, 6, 9, 10]
+idx: 7, delta: 5, matching: false, a (12): [1, 3, 4, 6], b (3): [0, 2, 3, 4, 5, 7, 9, 10]
+idx: 7, delta: 6, matching: false, a (13): [0, 2, 3, 4, 5, 7, 8, 9, 10], b (2): [0, 7, 8]
+idx: 7, delta: 7, matching: false, a (14): [1, 2, 5, 6, 8, 9, 10], b (1): [0, 7]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 2, 5, 7, 8], b (9): [0, 3, 4, 7, 8]
+idx: 8, delta: 2, matching: false, a (10): [3, 4, 8, 9, 10], b (7): [1, 2, 5, 6, 7, 8, 9, 10]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6, 7], b (6): [0, 1, 2, 5, 6, 7, 9, 10]
+idx: 8, delta: 4, matching: false, a (12): [1, 3, 4, 6], b (5): [1, 2, 3, 4, 5, 6, 8, 9, 10]
+idx: 8, delta: 5, matching: false, a (13): [0, 2, 3, 4, 5, 7, 8, 9, 10], b (4): [1, 3, 4, 6, 9, 10]
+idx: 8, delta: 6, matching: false, a (14): [1, 2, 5, 6, 8, 9, 10], b (3): [0, 2, 3, 4, 5, 7, 9, 10]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 3, 4, 7, 8], b (10): [3, 4, 8, 9, 10]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6, 7], b (8): [0, 2, 5, 7, 8]
+idx: 9, delta: 3, matching: false, a (12): [1, 3, 4, 6], b (7): [1, 2, 5, 6, 7, 8, 9, 10]
+idx: 9, delta: 4, matching: false, a (13): [0, 2, 3, 4, 5, 7, 8, 9, 10], b (6): [0, 1, 2, 5, 6, 7, 9, 10]
+idx: 9, delta: 5, matching: false, a (14): [1, 2, 5, 6, 8, 9, 10], b (5): [1, 2, 3, 4, 5, 6, 8, 9, 10]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [3, 4, 8, 9, 10], b (11): [0, 1, 2, 3, 4, 5, 6, 7]
+idx: 10, delta: 2, matching: false, a (12): [1, 3, 4, 6], b (9): [0, 3, 4, 7, 8]
+idx: 10, delta: 3, matching: false, a (13): [0, 2, 3, 4, 5, 7, 8, 9, 10], b (8): [0, 2, 5, 7, 8]
+idx: 10, delta: 4, matching: false, a (14): [1, 2, 5, 6, 8, 9, 10], b (7): [1, 2, 5, 6, 7, 8, 9, 10]
+idx: 10, delta: 4 --- found smudge!
+idx: 10 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 3, 6, 8, 9, 11, 13], b (1): [0, 4, 5, 6, 7, 11, 12, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 4, 5, 6, 7, 11, 12, 14], b (2): [3, 5, 6, 7, 8, 11, 13, 14]
+idx: 1, delta: 2, matching: false, a (3): [0, 3, 4, 5, 9, 10, 11, 12, 13], b (0): [1, 2, 3, 6, 8, 9, 11, 13]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 5, 6, 7, 8, 11, 13, 14], b (3): [0, 3, 4, 5, 9, 10, 11, 12, 13]
+idx: 2, delta: 2, matching: false, a (4): [0, 3, 4, 5, 9, 10, 11, 12, 13], b (1): [0, 4, 5, 6, 7, 11, 12, 14]
+idx: 2, delta: 3, matching: false, a (5): [3, 5, 6, 7, 8, 11, 13, 14], b (0): [1, 2, 3, 6, 8, 9, 11, 13]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [0, 3, 4, 5, 9, 10, 11, 12, 13], b (4): [0, 3, 4, 5, 9, 10, 11, 12, 13]
+idx: 3, delta: 2, matching: true, a (5): [3, 5, 6, 7, 8, 11, 13, 14], b (2): [3, 5, 6, 7, 8, 11, 13, 14]
+idx: 3, delta: 3, matching: true, a (6): [0, 4, 5, 6, 7, 11, 12, 14], b (1): [0, 4, 5, 6, 7, 11, 12, 14]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 3, 6, 7, 8, 9, 11, 13], b (0): [1, 2, 3, 6, 8, 9, 11, 13]
+idx: 3, delta: 4 --- found smudge!
+idx: 3 --- EXITING WITH true
+.###..#.##.#.#.
+#...####...##.#
+...#.####..#.##
+#..###...#####.
+#..###...#####.
+...#.####..#.##
+#...####...##.#
+.###..####.#.#.
+#.#..#.####..##
+#..#####..#..##
+#..#####..#..##
+411 (vert: 11, horiz: 4)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 7, 9, 10], b (1): [8, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [8, 10], b (2): [0, 1, 2, 5, 6, 7]
+idx: 1, delta: 2, matching: false, a (3): [1, 3, 4, 6, 8, 10], b (0): [0, 7, 9, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 5, 6, 7], b (3): [1, 3, 4, 6, 8, 10]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 4, 5, 6], b (1): [8, 10]
+idx: 2, delta: 3, matching: false, a (5): [2, 5, 9, 10], b (0): [0, 7, 9, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 3, 4, 6, 8, 10], b (4): [1, 2, 3, 4, 5, 6]
+idx: 3, delta: 2, matching: false, a (5): [2, 5, 9, 10], b (2): [0, 1, 2, 5, 6, 7]
+idx: 3, delta: 3, matching: false, a (6): [2, 5, 9], b (1): [8, 10]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 6, 7, 10], b (0): [0, 7, 9, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 4, 5, 6], b (5): [2, 5, 9, 10]
+idx: 4, delta: 2, matching: false, a (6): [2, 5, 9], b (3): [1, 3, 4, 6, 8, 10]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 6, 7, 10], b (2): [0, 1, 2, 5, 6, 7]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 3, 4, 5, 6, 7, 10], b (1): [8, 10]
+idx: 4, delta: 5, matching: false, a (9): [0, 2, 5, 7, 10], b (0): [0, 7, 9, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 5, 9, 10], b (6): [2, 5, 9]
+idx: 5, delta: 0 --- found smudge!
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 6, 7, 10], b (4): [1, 2, 3, 4, 5, 6]
+idx: 5, delta: 2 --- found smudge twice!
+idx: 6, delta: 0, matching: false, a (6): [2, 5, 9], b (7): [0, 1, 6, 7, 10]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 3, 4, 5, 6, 7, 10], b (5): [2, 5, 9, 10]
+idx: 6, delta: 3, matching: false, a (9): [0, 2, 5, 7, 10], b (4): [1, 2, 3, 4, 5, 6]
+idx: 6, delta: 4, matching: false, a (10): [0, 7, 8, 10], b (3): [1, 3, 4, 6, 8, 10]
+idx: 6, delta: 5, matching: false, a (11): [0, 7, 9, 10], b (2): [0, 1, 2, 5, 6, 7]
+idx: 6, delta: 6, matching: false, a (12): [1, 3, 4, 6, 8], b (1): [8, 10]
+idx: 6, delta: 7, matching: false, a (13): [1, 3, 4, 6], b (0): [0, 7, 9, 10]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 6, 7, 10], b (8): [0, 1, 2, 3, 4, 5, 6, 7, 10]
+idx: 7, delta: 2, matching: false, a (9): [0, 2, 5, 7, 10], b (6): [2, 5, 9]
+idx: 7, delta: 3, matching: false, a (10): [0, 7, 8, 10], b (5): [2, 5, 9, 10]
+idx: 7, delta: 4, matching: false, a (11): [0, 7, 9, 10], b (4): [1, 2, 3, 4, 5, 6]
+idx: 7, delta: 5, matching: false, a (12): [1, 3, 4, 6, 8], b (3): [1, 3, 4, 6, 8, 10]
+idx: 7, delta: 5 --- found smudge!
+idx: 7, delta: 6, matching: false, a (13): [1, 3, 4, 6], b (2): [0, 1, 2, 5, 6, 7]
+idx: 7, delta: 6 --- found smudge twice!
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 2, 3, 4, 5, 6, 7, 10], b (9): [0, 2, 5, 7, 10]
+idx: 8, delta: 2, matching: false, a (10): [0, 7, 8, 10], b (7): [0, 1, 6, 7, 10]
+idx: 8, delta: 3, matching: false, a (11): [0, 7, 9, 10], b (6): [2, 5, 9]
+idx: 8, delta: 4, matching: false, a (12): [1, 3, 4, 6, 8], b (5): [2, 5, 9, 10]
+idx: 8, delta: 5, matching: false, a (13): [1, 3, 4, 6], b (4): [1, 2, 3, 4, 5, 6]
+idx: 8, delta: 6, matching: false, a (14): [0, 7, 9, 10], b (3): [1, 3, 4, 6, 8, 10]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 2, 5, 7, 10], b (10): [0, 7, 8, 10]
+idx: 9, delta: 2, matching: false, a (11): [0, 7, 9, 10], b (8): [0, 1, 2, 3, 4, 5, 6, 7, 10]
+idx: 9, delta: 3, matching: false, a (12): [1, 3, 4, 6, 8], b (7): [0, 1, 6, 7, 10]
+idx: 9, delta: 4, matching: false, a (13): [1, 3, 4, 6], b (6): [2, 5, 9]
+idx: 9, delta: 5, matching: false, a (14): [0, 7, 9, 10], b (5): [2, 5, 9, 10]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 7, 8, 10], b (11): [0, 7, 9, 10]
+idx: 10, delta: 2, matching: false, a (12): [1, 3, 4, 6, 8], b (9): [0, 2, 5, 7, 10]
+idx: 10, delta: 3, matching: false, a (13): [1, 3, 4, 6], b (8): [0, 1, 2, 3, 4, 5, 6, 7, 10]
+idx: 10, delta: 4, matching: false, a (14): [0, 7, 9, 10], b (7): [0, 1, 6, 7, 10]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 7, 9, 10], b (12): [1, 3, 4, 6, 8]
+idx: 11, delta: 2, matching: false, a (13): [1, 3, 4, 6], b (10): [0, 7, 8, 10]
+idx: 11, delta: 3, matching: false, a (14): [0, 7, 9, 10], b (9): [0, 2, 5, 7, 10]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [1, 3, 4, 6, 8], b (13): [1, 3, 4, 6]
+idx: 12, delta: 0 --- found smudge!
+idx: 12, delta: 2, matching: true, a (14): [0, 7, 9, 10], b (11): [0, 7, 9, 10]
+idx: 12 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 7, 8, 9, 10, 11, 14], b (1): [2, 3, 4, 7, 8, 12, 13]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 3, 4, 7, 8, 12, 13], b (2): [2, 4, 5, 6, 8, 9]
+idx: 1, delta: 2, matching: false, a (3): [3, 4, 8, 12, 13], b (0): [0, 2, 7, 8, 9, 10, 11, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 4, 5, 6, 8, 9], b (3): [3, 4, 8, 12, 13]
+idx: 2, delta: 2, matching: false, a (4): [3, 4, 8, 12, 13], b (1): [2, 3, 4, 7, 8, 12, 13]
+idx: 2, delta: 3, matching: false, a (5): [2, 4, 5, 6, 8, 9], b (0): [0, 2, 7, 8, 9, 10, 11, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [3, 4, 8, 12, 13], b (4): [3, 4, 8, 12, 13]
+idx: 3, delta: 2, matching: true, a (5): [2, 4, 5, 6, 8, 9], b (2): [2, 4, 5, 6, 8, 9]
+idx: 3, delta: 3, matching: true, a (6): [2, 3, 4, 7, 8, 12, 13], b (1): [2, 3, 4, 7, 8, 12, 13]
+idx: 3, delta: 4, matching: true, a (7): [0, 2, 7, 8, 9, 10, 11, 14], b (0): [0, 2, 7, 8, 9, 10, 11, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [3, 4, 8, 12, 13], b (5): [2, 4, 5, 6, 8, 9]
+idx: 4, delta: 2, matching: false, a (6): [2, 3, 4, 7, 8, 12, 13], b (3): [3, 4, 8, 12, 13]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 7, 8, 9, 10, 11, 14], b (2): [2, 4, 5, 6, 8, 9]
+idx: 4, delta: 4, matching: false, a (8): [1, 3, 10, 12], b (1): [2, 3, 4, 7, 8, 12, 13]
+idx: 4, delta: 5, matching: false, a (9): [0, 5, 6, 11, 14], b (0): [0, 2, 7, 8, 9, 10, 11, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 4, 5, 6, 8, 9], b (6): [2, 3, 4, 7, 8, 12, 13]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 7, 8, 9, 10, 11, 14], b (4): [3, 4, 8, 12, 13]
+idx: 5, delta: 3, matching: false, a (8): [1, 3, 10, 12], b (3): [3, 4, 8, 12, 13]
+idx: 5, delta: 4, matching: false, a (9): [0, 5, 6, 11, 14], b (2): [2, 4, 5, 6, 8, 9]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 3, 5, 7, 8, 9, 10, 11, 14], b (1): [2, 3, 4, 7, 8, 12, 13]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [2, 3, 4, 7, 8, 12, 13], b (7): [0, 2, 7, 8, 9, 10, 11, 14]
+idx: 6, delta: 2, matching: false, a (8): [1, 3, 10, 12], b (5): [2, 4, 5, 6, 8, 9]
+idx: 6, delta: 3, matching: false, a (9): [0, 5, 6, 11, 14], b (4): [3, 4, 8, 12, 13]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 3, 5, 7, 8, 9, 10, 11, 14], b (3): [3, 4, 8, 12, 13]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 2, 7, 8, 9, 10, 11, 14], b (8): [1, 3, 10, 12]
+idx: 7, delta: 2, matching: false, a (9): [0, 5, 6, 11, 14], b (6): [2, 3, 4, 7, 8, 12, 13]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 3, 5, 7, 8, 9, 10, 11, 14], b (5): [2, 4, 5, 6, 8, 9]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [1, 3, 10, 12], b (9): [0, 5, 6, 11, 14]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 3, 5, 7, 8, 9, 10, 11, 14], b (7): [0, 2, 7, 8, 9, 10, 11, 14]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 5, 6, 11, 14], b (10): [0, 1, 3, 5, 7, 8, 9, 10, 11, 14]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+#.#....#####..#
+..###..##...##.
+..#.###.##.....
+...##...#...##.
+...##...#...##.
+..#.###.##.....
+..###..##...##.
+#.#....#####..#
+.#.#......#.#..
+#....##....#..#
+##.#.#.#####..#
+13 (vert: 13, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 4, 5], b (1): [0, 1, 2, 3, 4, 7, 8]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 3, 4, 7, 8], b (2): [1, 2]
+idx: 1, delta: 2, matching: false, a (3): [7], b (0): [1, 2, 4, 5]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 2], b (3): [7]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 3, 4, 6, 7, 8], b (1): [0, 1, 2, 3, 4, 7, 8]
+idx: 2, delta: 2 --- found smudge!
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 3, 5, 7, 8], b (0): [1, 2, 4, 5]
+idx: 2, delta: 3 --- found smudge twice!
+idx: 3, delta: 0, matching: false, a (3): [7], b (4): [0, 1, 2, 3, 4, 6, 7, 8]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 3, 5, 7, 8], b (2): [1, 2]
+idx: 3, delta: 3, matching: false, a (6): [0, 3, 6], b (1): [0, 1, 2, 3, 4, 7, 8]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 4, 6, 7, 8], b (0): [1, 2, 4, 5]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 3, 4, 6, 7, 8], b (5): [0, 1, 2, 3, 5, 7, 8]
+idx: 4, delta: 2, matching: false, a (6): [0, 3, 6], b (3): [7]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 4, 6, 7, 8], b (2): [1, 2]
+idx: 4, delta: 4, matching: false, a (8): [2, 8], b (1): [0, 1, 2, 3, 4, 7, 8]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 3, 4], b (0): [1, 2, 4, 5]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 3, 5, 7, 8], b (6): [0, 3, 6]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 4, 6, 7, 8], b (4): [0, 1, 2, 3, 4, 6, 7, 8]
+idx: 5, delta: 3, matching: false, a (8): [2, 8], b (3): [7]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 3, 4], b (2): [1, 2]
+idx: 5, delta: 5, matching: false, a (10): [5, 6, 7, 8], b (1): [0, 1, 2, 3, 4, 7, 8]
+idx: 5, delta: 6, matching: false, a (11): [4, 5, 6], b (0): [1, 2, 4, 5]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 3, 6], b (7): [1, 2, 4, 6, 7, 8]
+idx: 6, delta: 2, matching: false, a (8): [2, 8], b (5): [0, 1, 2, 3, 5, 7, 8]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 3, 4], b (4): [0, 1, 2, 3, 4, 6, 7, 8]
+idx: 6, delta: 4, matching: false, a (10): [5, 6, 7, 8], b (3): [7]
+idx: 6, delta: 5, matching: false, a (11): [4, 5, 6], b (2): [1, 2]
+idx: 6, delta: 6, matching: false, a (12): [4, 5, 6, 8], b (1): [0, 1, 2, 3, 4, 7, 8]
+idx: 6, delta: 7, matching: false, a (13): [0, 3, 7], b (0): [1, 2, 4, 5]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 4, 6, 7, 8], b (8): [2, 8]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 2, 3, 4], b (6): [0, 3, 6]
+idx: 7, delta: 3, matching: false, a (10): [5, 6, 7, 8], b (5): [0, 1, 2, 3, 5, 7, 8]
+idx: 7, delta: 4, matching: false, a (11): [4, 5, 6], b (4): [0, 1, 2, 3, 4, 6, 7, 8]
+idx: 7, delta: 5, matching: false, a (12): [4, 5, 6, 8], b (3): [7]
+idx: 7, delta: 6, matching: false, a (13): [0, 3, 7], b (2): [1, 2]
+idx: 7, delta: 7, matching: false, a (14): [1, 2, 5], b (1): [0, 1, 2, 3, 4, 7, 8]
+idx: 7, delta: 8, matching: false, a (15): [0, 3, 6, 8], b (0): [1, 2, 4, 5]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [2, 8], b (9): [0, 1, 2, 3, 4]
+idx: 8, delta: 2, matching: false, a (10): [5, 6, 7, 8], b (7): [1, 2, 4, 6, 7, 8]
+idx: 8, delta: 3, matching: false, a (11): [4, 5, 6], b (6): [0, 3, 6]
+idx: 8, delta: 4, matching: false, a (12): [4, 5, 6, 8], b (5): [0, 1, 2, 3, 5, 7, 8]
+idx: 8, delta: 5, matching: false, a (13): [0, 3, 7], b (4): [0, 1, 2, 3, 4, 6, 7, 8]
+idx: 8, delta: 6, matching: false, a (14): [1, 2, 5], b (3): [7]
+idx: 8, delta: 7, matching: false, a (15): [0, 3, 6, 8], b (2): [1, 2]
+idx: 8, delta: 8, matching: false, a (16): [0, 3, 6, 8], b (1): [0, 1, 2, 3, 4, 7, 8]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 2, 3, 4], b (10): [5, 6, 7, 8]
+idx: 9, delta: 2, matching: false, a (11): [4, 5, 6], b (8): [2, 8]
+idx: 9, delta: 3, matching: false, a (12): [4, 5, 6, 8], b (7): [1, 2, 4, 6, 7, 8]
+idx: 9, delta: 4, matching: false, a (13): [0, 3, 7], b (6): [0, 3, 6]
+idx: 9, delta: 5, matching: false, a (14): [1, 2, 5], b (5): [0, 1, 2, 3, 5, 7, 8]
+idx: 9, delta: 6, matching: false, a (15): [0, 3, 6, 8], b (4): [0, 1, 2, 3, 4, 6, 7, 8]
+idx: 9, delta: 7, matching: false, a (16): [0, 3, 6, 8], b (3): [7]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [5, 6, 7, 8], b (11): [4, 5, 6]
+idx: 10, delta: 2, matching: false, a (12): [4, 5, 6, 8], b (9): [0, 1, 2, 3, 4]
+idx: 10, delta: 3, matching: false, a (13): [0, 3, 7], b (8): [2, 8]
+idx: 10, delta: 4, matching: false, a (14): [1, 2, 5], b (7): [1, 2, 4, 6, 7, 8]
+idx: 10, delta: 5, matching: false, a (15): [0, 3, 6, 8], b (6): [0, 3, 6]
+idx: 10, delta: 5 --- found smudge!
+idx: 10, delta: 6, matching: false, a (16): [0, 3, 6, 8], b (5): [0, 1, 2, 3, 5, 7, 8]
+idx: 10, delta: 6 --- found smudge twice!
+idx: 11, delta: 0, matching: false, a (11): [4, 5, 6], b (12): [4, 5, 6, 8]
+idx: 11, delta: 0 --- found smudge!
+idx: 11, delta: 2, matching: false, a (13): [0, 3, 7], b (10): [5, 6, 7, 8]
+idx: 11, delta: 2 --- found smudge twice!
+idx: 12, delta: 0, matching: false, a (12): [4, 5, 6, 8], b (13): [0, 3, 7]
+idx: 12, delta: 2, matching: false, a (14): [1, 2, 5], b (11): [4, 5, 6]
+idx: 12, delta: 3, matching: false, a (15): [0, 3, 6, 8], b (10): [5, 6, 7, 8]
+idx: 12, delta: 4, matching: false, a (16): [0, 3, 6, 8], b (9): [0, 1, 2, 3, 4]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 3, 7], b (14): [1, 2, 5]
+idx: 13, delta: 2, matching: false, a (15): [0, 3, 6, 8], b (12): [4, 5, 6, 8]
+idx: 13, delta: 3, matching: false, a (16): [0, 3, 6, 8], b (11): [4, 5, 6]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [1, 2, 5], b (15): [0, 3, 6, 8]
+idx: 14, delta: 2, matching: false, a (16): [0, 3, 6, 8], b (13): [0, 3, 7]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: true, a (15): [0, 3, 6, 8], b (16): [0, 3, 6, 8]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [1, 4, 5, 6, 9, 13, 15, 16], b (1): [0, 1, 2, 4, 5, 7, 9, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 4, 5, 7, 9, 14], b (2): [0, 1, 2, 4, 5, 7, 8, 9, 14]
+idx: 1, delta: 0 --- found smudge!
+idx: 1, delta: 2, matching: true, a (3): [1, 4, 5, 6, 9, 13, 15, 16], b (0): [1, 4, 5, 6, 9, 13, 15, 16]
+idx: 1 --- EXITING WITH true
+.#..###..#...#.##
+###.##.#.#....#..
+###.##.###....#..
+.#..###..#...#.##
+##..#..#.#.##....
+#....#....###.#..
+....#.##..###..##
+.#.###.#..#..#...
+.#..##.##.#.#..##
+200 (vert: 0, horiz: 2)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 4, 5, 7, 10], b (1): [1, 2, 6, 7, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 6, 7, 10], b (2): [3, 4, 6]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 5, 6, 8, 9], b (0): [1, 2, 4, 5, 7, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 4, 6], b (3): [0, 1, 5, 6, 8, 9]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 5, 6, 8, 9], b (1): [1, 2, 6, 7, 10]
+idx: 2, delta: 3, matching: false, a (5): [3, 4, 6], b (0): [1, 2, 4, 5, 7, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [0, 1, 5, 6, 8, 9], b (4): [0, 1, 5, 6, 8, 9]
+idx: 3, delta: 2, matching: true, a (5): [3, 4, 6], b (2): [3, 4, 6]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 4, 6, 7, 10], b (1): [1, 2, 6, 7, 10]
+idx: 3, delta: 3 --- found smudge!
+idx: 3, delta: 4, matching: true, a (7): [1, 2, 4, 5, 7, 10], b (0): [1, 2, 4, 5, 7, 10]
+idx: 3 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [3, 4, 8], b (1): [0, 1, 3, 4, 6, 7, 8, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 3, 4, 6, 7, 8, 9], b (2): [0, 1, 6, 7, 10]
+idx: 1, delta: 2, matching: false, a (3): [2, 5], b (0): [3, 4, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 6, 7, 10], b (3): [2, 5]
+idx: 2, delta: 2, matching: false, a (4): [0, 2, 5, 6, 7], b (1): [0, 1, 3, 4, 6, 7, 8, 9]
+idx: 2, delta: 3, matching: false, a (5): [0, 3, 4, 7, 10], b (0): [3, 4, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 5], b (4): [0, 2, 5, 6, 7]
+idx: 3, delta: 2, matching: false, a (5): [0, 3, 4, 7, 10], b (2): [0, 1, 6, 7, 10]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 3, 4, 5, 6, 9], b (1): [0, 1, 3, 4, 6, 7, 8, 9]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 6, 7, 10], b (0): [3, 4, 8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 2, 5, 6, 7], b (5): [0, 3, 4, 7, 10]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 3, 4, 5, 6, 9], b (3): [2, 5]
+idx: 4, delta: 3, matching: true, a (7): [0, 1, 6, 7, 10], b (2): [0, 1, 6, 7, 10]
+idx: 4, delta: 4, matching: false, a (8): [3, 4, 10], b (1): [0, 1, 3, 4, 6, 7, 8, 9]
+idx: 4, delta: 5, matching: false, a (9): [3, 4, 10], b (0): [3, 4, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 3, 4, 7, 10], b (6): [1, 2, 3, 4, 5, 6, 9]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 6, 7, 10], b (4): [0, 2, 5, 6, 7]
+idx: 5, delta: 3, matching: false, a (8): [3, 4, 10], b (3): [2, 5]
+idx: 5, delta: 4, matching: false, a (9): [3, 4, 10], b (2): [0, 1, 6, 7, 10]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 6, 7, 10], b (1): [0, 1, 3, 4, 6, 7, 8, 9]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 3, 4, 5, 6, 9], b (7): [0, 1, 6, 7, 10]
+idx: 6, delta: 2, matching: false, a (8): [3, 4, 10], b (5): [0, 3, 4, 7, 10]
+idx: 6, delta: 3, matching: false, a (9): [3, 4, 10], b (4): [0, 2, 5, 6, 7]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 6, 7, 10], b (3): [2, 5]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 6, 7, 10], b (8): [3, 4, 10]
+idx: 7, delta: 2, matching: false, a (9): [3, 4, 10], b (6): [1, 2, 3, 4, 5, 6, 9]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 6, 7, 10], b (5): [0, 3, 4, 7, 10]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: true, a (8): [3, 4, 10], b (9): [3, 4, 10]
+idx: 8, delta: 2, matching: true, a (10): [0, 1, 6, 7, 10], b (7): [0, 1, 6, 7, 10]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [3, 4, 10], b (10): [0, 1, 6, 7, 10]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+...##...#..
+##.##.####.
+##....##..#
+..#..#.....
+#.#..###...
+#..##..#..#
+.######..#.
+##....##..#
+...##.....#
+...##.....#
+##....##..#
+4 (vert: 4, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 3, 5, 6, 7, 10], b (1): [2, 3, 4, 6, 7, 8, 10, 11, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 3, 4, 6, 7, 8, 10, 11, 12], b (2): [1, 4, 5, 6, 7, 8, 12]
+idx: 1, delta: 2, matching: false, a (3): [1, 4, 5, 6, 7, 8, 12], b (0): [0, 1, 2, 3, 5, 6, 7, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: true, a (2): [1, 4, 5, 6, 7, 8, 12], b (3): [1, 4, 5, 6, 7, 8, 12]
+idx: 2, delta: 2, matching: true, a (4): [2, 3, 4, 6, 7, 8, 10, 11, 12], b (1): [2, 3, 4, 6, 7, 8, 10, 11, 12]
+idx: 2, delta: 3, matching: true, a (5): [0, 1, 2, 3, 5, 6, 7, 10], b (0): [0, 1, 2, 3, 5, 6, 7, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 4, 5, 6, 7, 8, 12], b (4): [2, 3, 4, 6, 7, 8, 10, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 3, 5, 6, 7, 10], b (2): [1, 4, 5, 6, 7, 8, 12]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 6, 8, 10, 11, 12], b (1): [2, 3, 4, 6, 7, 8, 10, 11, 12]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 3, 4, 5, 9, 10], b (0): [0, 1, 2, 3, 5, 6, 7, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 3, 4, 6, 7, 8, 10, 11, 12], b (5): [0, 1, 2, 3, 5, 6, 7, 10]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 6, 8, 10, 11, 12], b (3): [1, 4, 5, 6, 7, 8, 12]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 3, 4, 5, 9, 10], b (2): [1, 4, 5, 6, 7, 8, 12]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 4, 6, 8, 9, 11], b (1): [2, 3, 4, 6, 7, 8, 10, 11, 12]
+idx: 4, delta: 5, matching: false, a (9): [1, 2, 4, 6, 8, 9, 11], b (0): [0, 1, 2, 3, 5, 6, 7, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 3, 5, 6, 7, 10], b (6): [1, 2, 6, 8, 10, 11, 12]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 3, 4, 5, 9, 10], b (4): [2, 3, 4, 6, 7, 8, 10, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [1, 2, 4, 6, 8, 9, 11], b (3): [1, 4, 5, 6, 7, 8, 12]
+idx: 5, delta: 4, matching: false, a (9): [1, 2, 4, 6, 8, 9, 11], b (2): [1, 4, 5, 6, 7, 8, 12]
+idx: 5, delta: 5, matching: false, a (10): [1, 2, 3, 4, 5, 9, 10], b (1): [2, 3, 4, 6, 7, 8, 10, 11, 12]
+idx: 5, delta: 6, matching: false, a (11): [1, 2, 6, 8, 10, 11, 12], b (0): [0, 1, 2, 3, 5, 6, 7, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 6, 8, 10, 11, 12], b (7): [1, 2, 3, 4, 5, 9, 10]
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 4, 6, 8, 9, 11], b (5): [0, 1, 2, 3, 5, 6, 7, 10]
+idx: 6, delta: 3, matching: false, a (9): [1, 2, 4, 6, 8, 9, 11], b (4): [2, 3, 4, 6, 7, 8, 10, 11, 12]
+idx: 6, delta: 4, matching: false, a (10): [1, 2, 3, 4, 5, 9, 10], b (3): [1, 4, 5, 6, 7, 8, 12]
+idx: 6, delta: 5, matching: false, a (11): [1, 2, 6, 8, 10, 11, 12], b (2): [1, 4, 5, 6, 7, 8, 12]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 2, 3, 5, 6, 7, 10], b (1): [2, 3, 4, 6, 7, 8, 10, 11, 12]
+idx: 6, delta: 7, matching: false, a (13): [2, 3, 4, 6, 7, 8, 10, 11, 12], b (0): [0, 1, 2, 3, 5, 6, 7, 10]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 3, 4, 5, 9, 10], b (8): [1, 2, 4, 6, 8, 9, 11]
+idx: 7, delta: 2, matching: false, a (9): [1, 2, 4, 6, 8, 9, 11], b (6): [1, 2, 6, 8, 10, 11, 12]
+idx: 7, delta: 3, matching: false, a (10): [1, 2, 3, 4, 5, 9, 10], b (5): [0, 1, 2, 3, 5, 6, 7, 10]
+idx: 7, delta: 4, matching: false, a (11): [1, 2, 6, 8, 10, 11, 12], b (4): [2, 3, 4, 6, 7, 8, 10, 11, 12]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 2, 3, 5, 6, 7, 10], b (3): [1, 4, 5, 6, 7, 8, 12]
+idx: 7, delta: 6, matching: false, a (13): [2, 3, 4, 6, 7, 8, 10, 11, 12], b (2): [1, 4, 5, 6, 7, 8, 12]
+idx: 7, delta: 7, matching: false, a (14): [1, 5, 6, 7, 8, 12], b (1): [2, 3, 4, 6, 7, 8, 10, 11, 12]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: true, a (8): [1, 2, 4, 6, 8, 9, 11], b (9): [1, 2, 4, 6, 8, 9, 11]
+idx: 8, delta: 2, matching: true, a (10): [1, 2, 3, 4, 5, 9, 10], b (7): [1, 2, 3, 4, 5, 9, 10]
+idx: 8, delta: 3, matching: true, a (11): [1, 2, 6, 8, 10, 11, 12], b (6): [1, 2, 6, 8, 10, 11, 12]
+idx: 8, delta: 4, matching: true, a (12): [0, 1, 2, 3, 5, 6, 7, 10], b (5): [0, 1, 2, 3, 5, 6, 7, 10]
+idx: 8, delta: 5, matching: true, a (13): [2, 3, 4, 6, 7, 8, 10, 11, 12], b (4): [2, 3, 4, 6, 7, 8, 10, 11, 12]
+idx: 8, delta: 6, matching: false, a (14): [1, 5, 6, 7, 8, 12], b (3): [1, 4, 5, 6, 7, 8, 12]
+idx: 8, delta: 6 --- found smudge!
+idx: 8 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 5, 12], b (1): [0, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 14], b (2): [0, 1, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 4, 5, 7, 10, 12, 13], b (0): [0, 5, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13], b (3): [0, 1, 4, 5, 7, 10, 12, 13]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 4, 7, 8, 9, 10, 13], b (1): [0, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 14]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 5, 7, 10, 12, 14], b (0): [0, 5, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 4, 5, 7, 10, 12, 13], b (4): [1, 2, 3, 4, 7, 8, 9, 10, 13]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 5, 7, 10, 12, 14], b (2): [0, 1, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 3, 4, 5, 6, 8, 9, 11, 12, 13, 14], b (1): [0, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 14]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2, 3, 4, 5, 12, 13, 14], b (0): [0, 5, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 4, 7, 8, 9, 10, 13], b (5): [0, 2, 3, 5, 7, 10, 12, 14]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 3, 4, 5, 6, 8, 9, 11, 12, 13, 14], b (3): [0, 1, 4, 5, 7, 10, 12, 13]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 2, 3, 4, 5, 12, 13, 14], b (2): [0, 1, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 3, 4, 6, 8, 9, 11, 13, 14], b (1): [0, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 14]
+idx: 4, delta: 5, matching: false, a (9): [7, 8, 9, 10], b (0): [0, 5, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 3, 5, 7, 10, 12, 14], b (6): [0, 1, 2, 3, 4, 5, 6, 8, 9, 11, 12, 13, 14]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2, 3, 4, 5, 12, 13, 14], b (4): [1, 2, 3, 4, 7, 8, 9, 10, 13]
+idx: 5, delta: 3, matching: false, a (8): [1, 2, 3, 4, 6, 8, 9, 11, 13, 14], b (3): [0, 1, 4, 5, 7, 10, 12, 13]
+idx: 5, delta: 4, matching: false, a (9): [7, 8, 9, 10], b (2): [0, 1, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 4, 5, 6, 7, 10, 11, 12, 13], b (1): [0, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 14]
+idx: 5, delta: 6, matching: false, a (11): [1, 4, 6, 8, 9, 11, 13], b (0): [0, 5, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 3, 4, 5, 6, 8, 9, 11, 12, 13, 14], b (7): [0, 1, 2, 3, 4, 5, 12, 13, 14]
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 3, 4, 6, 8, 9, 11, 13, 14], b (5): [0, 2, 3, 5, 7, 10, 12, 14]
+idx: 6, delta: 3, matching: false, a (9): [7, 8, 9, 10], b (4): [1, 2, 3, 4, 7, 8, 9, 10, 13]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 4, 5, 6, 7, 10, 11, 12, 13], b (3): [0, 1, 4, 5, 7, 10, 12, 13]
+idx: 6, delta: 5, matching: false, a (11): [1, 4, 6, 8, 9, 11, 13], b (2): [0, 1, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
+idx: 6, delta: 6, matching: false, a (12): [1, 2, 3, 4, 6, 11, 13, 14], b (1): [0, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 14]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 2, 3, 4, 5, 12, 13, 14], b (8): [1, 2, 3, 4, 6, 8, 9, 11, 13, 14]
+idx: 7, delta: 2, matching: false, a (9): [7, 8, 9, 10], b (6): [0, 1, 2, 3, 4, 5, 6, 8, 9, 11, 12, 13, 14]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 4, 5, 6, 7, 10, 11, 12, 13], b (5): [0, 2, 3, 5, 7, 10, 12, 14]
+idx: 7, delta: 4, matching: false, a (11): [1, 4, 6, 8, 9, 11, 13], b (4): [1, 2, 3, 4, 7, 8, 9, 10, 13]
+idx: 7, delta: 5, matching: false, a (12): [1, 2, 3, 4, 6, 11, 13, 14], b (3): [0, 1, 4, 5, 7, 10, 12, 13]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [1, 2, 3, 4, 6, 8, 9, 11, 13, 14], b (9): [7, 8, 9, 10]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 4, 5, 6, 7, 10, 11, 12, 13], b (7): [0, 1, 2, 3, 4, 5, 12, 13, 14]
+idx: 8, delta: 3, matching: false, a (11): [1, 4, 6, 8, 9, 11, 13], b (6): [0, 1, 2, 3, 4, 5, 6, 8, 9, 11, 12, 13, 14]
+idx: 8, delta: 4, matching: false, a (12): [1, 2, 3, 4, 6, 11, 13, 14], b (5): [0, 2, 3, 5, 7, 10, 12, 14]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [7, 8, 9, 10], b (10): [0, 1, 4, 5, 6, 7, 10, 11, 12, 13]
+idx: 9, delta: 2, matching: false, a (11): [1, 4, 6, 8, 9, 11, 13], b (8): [1, 2, 3, 4, 6, 8, 9, 11, 13, 14]
+idx: 9, delta: 3, matching: false, a (12): [1, 2, 3, 4, 6, 11, 13, 14], b (7): [0, 1, 2, 3, 4, 5, 12, 13, 14]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 4, 5, 6, 7, 10, 11, 12, 13], b (11): [1, 4, 6, 8, 9, 11, 13]
+idx: 10, delta: 2, matching: false, a (12): [1, 2, 3, 4, 6, 11, 13, 14], b (9): [7, 8, 9, 10]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [1, 4, 6, 8, 9, 11, 13], b (12): [1, 2, 3, 4, 6, 11, 13, 14]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+#....#......#..
+#.##.########.#
+##..##########.
+##..##.#..#.##.
+.####..####..#.
+#.##.#.#..#.#.#
+#######.##.####
+######......###
+.####.#.##.#.##
+.......####....
+##..####..####.
+.#..#.#.##.#.#.
+.####.#....#.##
+9 (vert: 9, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 3, 4, 12, 13, 14], b (1): [0, 2, 3, 6, 7, 8, 11, 13, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 3, 6, 7, 8, 11, 13, 14], b (2): [0, 2, 3, 10, 12, 13]
+idx: 1, delta: 2, matching: false, a (3): [0, 3, 4, 9, 12, 14], b (0): [0, 1, 2, 3, 4, 12, 13, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 3, 10, 12, 13], b (3): [0, 3, 4, 9, 12, 14]
+idx: 2, delta: 2, matching: false, a (4): [0, 3, 4, 9, 12, 14], b (1): [0, 2, 3, 6, 7, 8, 11, 13, 14]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 10, 12, 13, 14], b (0): [0, 1, 2, 3, 4, 12, 13, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [0, 3, 4, 9, 12, 14], b (4): [0, 3, 4, 9, 12, 14]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 10, 12, 13, 14], b (2): [0, 2, 3, 10, 12, 13]
+idx: 3, delta: 2 --- found smudge!
+idx: 3, delta: 3, matching: true, a (6): [0, 2, 3, 6, 7, 8, 11, 13, 14], b (1): [0, 2, 3, 6, 7, 8, 11, 13, 14]
+idx: 3, delta: 4, matching: true, a (7): [0, 1, 2, 3, 4, 12, 13, 14], b (0): [0, 1, 2, 3, 4, 12, 13, 14]
+idx: 3 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 3, 4, 5, 6, 7, 11, 12], b (1): [0, 7, 8, 9, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 7, 8, 9, 14], b (2): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 4, 5, 6, 7, 8, 11, 12], b (0): [0, 1, 2, 3, 4, 5, 6, 7, 11, 12]
+idx: 1, delta: 2 --- found smudge!
+idx: 1 --- EXITING WITH true
+########...##..
+#......###....#
+###..##########
+#########..##..
+#..##..#...##..
+........#..##..
+.#....#.##.##.#
+.#....#.##.##.#
+.#....#........
+...##......##..
+..#..#...#.##.#
+.#....#.#..##..
+#.####.###.##.#
+###..###..####.
+##.######..##..
+204 (vert: 4, horiz: 2)
+
+idx: 0, delta: 0, matching: true, a (0): [3, 5, 9, 10], b (1): [3, 5, 9, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [3, 5, 9, 10], b (2): [0, 1, 2, 3, 6]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 5, 6, 7, 10], b (0): [3, 5, 9, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 6], b (3): [0, 2, 5, 6, 7, 10]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 4, 5, 6, 8], b (1): [3, 5, 9, 10]
+idx: 2, delta: 3, matching: false, a (5): [3, 4, 5, 6, 8], b (0): [3, 5, 9, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 5, 6, 7, 10], b (4): [1, 2, 4, 5, 6, 8]
+idx: 3, delta: 2, matching: false, a (5): [3, 4, 5, 6, 8], b (2): [0, 1, 2, 3, 6]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 4, 6, 7, 8, 9, 10], b (1): [3, 5, 9, 10]
+idx: 3, delta: 4, matching: false, a (7): [2, 3, 4, 5, 6, 7, 9, 10], b (0): [3, 5, 9, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 4, 5, 6, 8], b (5): [3, 4, 5, 6, 8]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 4, 6, 7, 8, 9, 10], b (3): [0, 2, 5, 6, 7, 10]
+idx: 4, delta: 3, matching: false, a (7): [2, 3, 4, 5, 6, 7, 9, 10], b (2): [0, 1, 2, 3, 6]
+idx: 4, delta: 4, matching: false, a (8): [2, 3, 5, 6, 7, 8, 9, 10], b (1): [3, 5, 9, 10]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 5, 6, 9], b (0): [3, 5, 9, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [3, 4, 5, 6, 8], b (6): [1, 2, 4, 6, 7, 8, 9, 10]
+idx: 5, delta: 2, matching: false, a (7): [2, 3, 4, 5, 6, 7, 9, 10], b (4): [1, 2, 4, 5, 6, 8]
+idx: 5, delta: 3, matching: false, a (8): [2, 3, 5, 6, 7, 8, 9, 10], b (3): [0, 2, 5, 6, 7, 10]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 5, 6, 9], b (2): [0, 1, 2, 3, 6]
+idx: 5, delta: 5, matching: false, a (10): [0, 2, 4, 5, 8, 10], b (1): [3, 5, 9, 10]
+idx: 5, delta: 6, matching: false, a (11): [0, 2, 4, 5, 8, 10], b (0): [3, 5, 9, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 4, 6, 7, 8, 9, 10], b (7): [2, 3, 4, 5, 6, 7, 9, 10]
+idx: 6, delta: 2, matching: false, a (8): [2, 3, 5, 6, 7, 8, 9, 10], b (5): [3, 4, 5, 6, 8]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 5, 6, 9], b (4): [1, 2, 4, 5, 6, 8]
+idx: 6, delta: 4, matching: false, a (10): [0, 2, 4, 5, 8, 10], b (3): [0, 2, 5, 6, 7, 10]
+idx: 6, delta: 5, matching: false, a (11): [0, 2, 4, 5, 8, 10], b (2): [0, 1, 2, 3, 6]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 5, 6, 9], b (1): [3, 5, 9, 10]
+idx: 6, delta: 7, matching: false, a (13): [2, 3, 5, 6, 7, 8, 9, 10], b (0): [3, 5, 9, 10]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [2, 3, 4, 5, 6, 7, 9, 10], b (8): [2, 3, 5, 6, 7, 8, 9, 10]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 2, 5, 6, 9], b (6): [1, 2, 4, 6, 7, 8, 9, 10]
+idx: 7, delta: 3, matching: false, a (10): [0, 2, 4, 5, 8, 10], b (5): [3, 4, 5, 6, 8]
+idx: 7, delta: 4, matching: false, a (11): [0, 2, 4, 5, 8, 10], b (4): [1, 2, 4, 5, 6, 8]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 5, 6, 9], b (3): [0, 2, 5, 6, 7, 10]
+idx: 7, delta: 6, matching: false, a (13): [2, 3, 5, 6, 7, 8, 9, 10], b (2): [0, 1, 2, 3, 6]
+idx: 7, delta: 7, matching: false, a (14): [2, 3, 4, 5, 6, 7, 9, 10], b (1): [3, 5, 9, 10]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [2, 3, 5, 6, 7, 8, 9, 10], b (9): [0, 1, 2, 5, 6, 9]
+idx: 8, delta: 2, matching: false, a (10): [0, 2, 4, 5, 8, 10], b (7): [2, 3, 4, 5, 6, 7, 9, 10]
+idx: 8, delta: 3, matching: false, a (11): [0, 2, 4, 5, 8, 10], b (6): [1, 2, 4, 6, 7, 8, 9, 10]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 5, 6, 9], b (5): [3, 4, 5, 6, 8]
+idx: 8, delta: 5, matching: false, a (13): [2, 3, 5, 6, 7, 8, 9, 10], b (4): [1, 2, 4, 5, 6, 8]
+idx: 8, delta: 6, matching: false, a (14): [2, 3, 4, 5, 6, 7, 9, 10], b (3): [0, 2, 5, 6, 7, 10]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 2, 5, 6, 9], b (10): [0, 2, 4, 5, 8, 10]
+idx: 9, delta: 2, matching: false, a (11): [0, 2, 4, 5, 8, 10], b (8): [2, 3, 5, 6, 7, 8, 9, 10]
+idx: 9, delta: 3, matching: false, a (12): [0, 1, 5, 6, 9], b (7): [2, 3, 4, 5, 6, 7, 9, 10]
+idx: 9, delta: 4, matching: false, a (13): [2, 3, 5, 6, 7, 8, 9, 10], b (6): [1, 2, 4, 6, 7, 8, 9, 10]
+idx: 9, delta: 5, matching: false, a (14): [2, 3, 4, 5, 6, 7, 9, 10], b (5): [3, 4, 5, 6, 8]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: true, a (10): [0, 2, 4, 5, 8, 10], b (11): [0, 2, 4, 5, 8, 10]
+idx: 10, delta: 2, matching: false, a (12): [0, 1, 5, 6, 9], b (9): [0, 1, 2, 5, 6, 9]
+idx: 10, delta: 2 --- found smudge!
+idx: 10, delta: 3, matching: true, a (13): [2, 3, 5, 6, 7, 8, 9, 10], b (8): [2, 3, 5, 6, 7, 8, 9, 10]
+idx: 10, delta: 4, matching: true, a (14): [2, 3, 4, 5, 6, 7, 9, 10], b (7): [2, 3, 4, 5, 6, 7, 9, 10]
+idx: 10 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [2, 3, 9, 10, 11, 12], b (1): [2, 4, 6, 9, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 4, 6, 9, 12], b (2): [2, 3, 4, 6, 7, 8, 9, 10, 11, 13, 14]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 5, 7, 8, 13, 14], b (0): [2, 3, 9, 10, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 3, 4, 6, 7, 8, 9, 10, 11, 13, 14], b (3): [0, 1, 2, 5, 7, 8, 13, 14]
+idx: 2, delta: 2, matching: false, a (4): [4, 5, 6, 7, 10, 11, 14], b (1): [2, 4, 6, 9, 12]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14], b (0): [2, 3, 9, 10, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 5, 7, 8, 13, 14], b (4): [4, 5, 6, 7, 10, 11, 14]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14], b (2): [2, 3, 4, 6, 7, 8, 9, 10, 11, 13, 14]
+idx: 3, delta: 3, matching: false, a (6): [2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14], b (1): [2, 4, 6, 9, 12]
+idx: 3, delta: 4, matching: false, a (7): [3, 6, 7, 8, 13, 14], b (0): [2, 3, 9, 10, 11, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [4, 5, 6, 7, 10, 11, 14], b (5): [0, 1, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 4, delta: 2, matching: false, a (6): [2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14], b (3): [0, 1, 2, 5, 7, 8, 13, 14]
+idx: 4, delta: 3, matching: false, a (7): [3, 6, 7, 8, 13, 14], b (2): [2, 3, 4, 6, 7, 8, 9, 10, 11, 13, 14]
+idx: 4, delta: 4, matching: false, a (8): [4, 5, 6, 8, 10, 11, 13], b (1): [2, 4, 6, 9, 12]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 6, 7, 8, 9, 12, 13, 14], b (0): [2, 3, 9, 10, 11, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14], b (6): [2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14]
+idx: 5, delta: 2, matching: false, a (7): [3, 6, 7, 8, 13, 14], b (4): [4, 5, 6, 7, 10, 11, 14]
+idx: 5, delta: 3, matching: false, a (8): [4, 5, 6, 8, 10, 11, 13], b (3): [0, 1, 2, 5, 7, 8, 13, 14]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 6, 7, 8, 9, 12, 13, 14], b (2): [2, 3, 4, 6, 7, 8, 9, 10, 11, 13, 14]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 3, 6, 7, 8, 10, 11, 13, 14], b (1): [2, 4, 6, 9, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14], b (7): [3, 6, 7, 8, 13, 14]
+idx: 6, delta: 2, matching: false, a (8): [4, 5, 6, 8, 10, 11, 13], b (5): [0, 1, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 6, 7, 8, 9, 12, 13, 14], b (4): [4, 5, 6, 7, 10, 11, 14]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 3, 6, 7, 8, 10, 11, 13, 14], b (3): [0, 1, 2, 5, 7, 8, 13, 14]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [3, 6, 7, 8, 13, 14], b (8): [4, 5, 6, 8, 10, 11, 13]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 6, 7, 8, 9, 12, 13, 14], b (6): [2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 3, 6, 7, 8, 10, 11, 13, 14], b (5): [0, 1, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [4, 5, 6, 8, 10, 11, 13], b (9): [0, 1, 6, 7, 8, 9, 12, 13, 14]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 3, 6, 7, 8, 10, 11, 13, 14], b (7): [3, 6, 7, 8, 13, 14]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 6, 7, 8, 9, 12, 13, 14], b (10): [0, 1, 3, 6, 7, 8, 10, 11, 13, 14]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+..##.....####..
+..#.#.#..#..#..
+..###.######.##
+###..#.##....##
+....####..##..#
+##.###.########
+..########..###
+...#..###....##
+....###.#.##.#.
+##....####..###
+##.#..###.##.##
+11 (vert: 11, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [2, 4, 6, 7, 9], b (1): [0, 1, 2, 3, 4, 10, 11, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 3, 4, 10, 11, 12], b (2): [0, 2, 3, 5, 6, 7, 8, 10, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 5, 8, 9, 11, 12], b (0): [2, 4, 6, 7, 9]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 3, 5, 6, 7, 8, 10, 11, 12], b (3): [0, 2, 5, 8, 9, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [0, 2, 7, 9], b (1): [0, 1, 2, 3, 4, 10, 11, 12]
+idx: 2, delta: 3, matching: false, a (5): [2, 4, 6, 7], b (0): [2, 4, 6, 7, 9]
+idx: 2, delta: 3 --- found smudge!
+idx: 2 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 3, 4, 6, 8, 9, 10, 11, 14], b (1): [1, 7, 10, 11, 12, 13, 14, 15, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 7, 10, 11, 12, 13, 14, 15, 16], b (2): [0, 1, 2, 3, 4, 5, 7, 8, 9, 12, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 8, 11, 13, 15, 16], b (0): [1, 2, 3, 4, 6, 8, 9, 10, 11, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 4, 5, 7, 8, 9, 12, 15, 16], b (3): [1, 2, 8, 11, 13, 15, 16]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 5, 8, 10, 11, 12, 13, 15, 16], b (1): [1, 7, 10, 11, 12, 13, 14, 15, 16]
+idx: 2, delta: 3, matching: false, a (5): [2, 3, 7, 9, 10, 11, 12, 14, 15, 16], b (0): [1, 2, 3, 4, 6, 8, 9, 10, 11, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 8, 11, 13, 15, 16], b (4): [0, 1, 5, 8, 10, 11, 12, 13, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [2, 3, 7, 9, 10, 11, 12, 14, 15, 16], b (2): [0, 1, 2, 3, 4, 5, 7, 8, 9, 12, 15, 16]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 5, 6, 7, 8, 12, 13, 14], b (1): [1, 7, 10, 11, 12, 13, 14, 15, 16]
+idx: 3, delta: 4, matching: false, a (7): [0, 2, 4, 5, 8, 10, 14], b (0): [1, 2, 3, 4, 6, 8, 9, 10, 11, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 5, 8, 10, 11, 12, 13, 15, 16], b (5): [2, 3, 7, 9, 10, 11, 12, 14, 15, 16]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 5, 6, 7, 8, 12, 13, 14], b (3): [1, 2, 8, 11, 13, 15, 16]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 4, 5, 8, 10, 14], b (2): [0, 1, 2, 3, 4, 5, 7, 8, 9, 12, 15, 16]
+idx: 4, delta: 4, matching: false, a (8): [2, 3, 6, 8, 11, 13], b (1): [1, 7, 10, 11, 12, 13, 14, 15, 16]
+idx: 4, delta: 5, matching: false, a (9): [0, 3, 4, 7, 12, 13], b (0): [1, 2, 3, 4, 6, 8, 9, 10, 11, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 3, 7, 9, 10, 11, 12, 14, 15, 16], b (6): [0, 2, 5, 6, 7, 8, 12, 13, 14]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 4, 5, 8, 10, 14], b (4): [0, 1, 5, 8, 10, 11, 12, 13, 15, 16]
+idx: 5, delta: 3, matching: false, a (8): [2, 3, 6, 8, 11, 13], b (3): [1, 2, 8, 11, 13, 15, 16]
+idx: 5, delta: 4, matching: false, a (9): [0, 3, 4, 7, 12, 13], b (2): [0, 1, 2, 3, 4, 5, 7, 8, 9, 12, 15, 16]
+idx: 5, delta: 5, matching: false, a (10): [1, 2, 8, 9, 11, 13, 15, 16], b (1): [1, 7, 10, 11, 12, 13, 14, 15, 16]
+idx: 5, delta: 6, matching: false, a (11): [1, 2, 3, 6, 7, 8, 13, 15, 16], b (0): [1, 2, 3, 4, 6, 8, 9, 10, 11, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 2, 5, 6, 7, 8, 12, 13, 14], b (7): [0, 2, 4, 5, 8, 10, 14]
+idx: 6, delta: 2, matching: false, a (8): [2, 3, 6, 8, 11, 13], b (5): [2, 3, 7, 9, 10, 11, 12, 14, 15, 16]
+idx: 6, delta: 3, matching: false, a (9): [0, 3, 4, 7, 12, 13], b (4): [0, 1, 5, 8, 10, 11, 12, 13, 15, 16]
+idx: 6, delta: 4, matching: false, a (10): [1, 2, 8, 9, 11, 13, 15, 16], b (3): [1, 2, 8, 11, 13, 15, 16]
+idx: 6, delta: 4 --- found smudge!
+idx: 6, delta: 5, matching: false, a (11): [1, 2, 3, 6, 7, 8, 13, 15, 16], b (2): [0, 1, 2, 3, 4, 5, 7, 8, 9, 12, 15, 16]
+idx: 6, delta: 5 --- found smudge twice!
+idx: 7, delta: 0, matching: false, a (7): [0, 2, 4, 5, 8, 10, 14], b (8): [2, 3, 6, 8, 11, 13]
+idx: 7, delta: 2, matching: false, a (9): [0, 3, 4, 7, 12, 13], b (6): [0, 2, 5, 6, 7, 8, 12, 13, 14]
+idx: 7, delta: 3, matching: false, a (10): [1, 2, 8, 9, 11, 13, 15, 16], b (5): [2, 3, 7, 9, 10, 11, 12, 14, 15, 16]
+idx: 7, delta: 4, matching: false, a (11): [1, 2, 3, 6, 7, 8, 13, 15, 16], b (4): [0, 1, 5, 8, 10, 11, 12, 13, 15, 16]
+idx: 7, delta: 5, matching: false, a (12): [1, 2, 3, 6, 7, 8, 9, 13, 15, 16], b (3): [1, 2, 8, 11, 13, 15, 16]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [2, 3, 6, 8, 11, 13], b (9): [0, 3, 4, 7, 12, 13]
+idx: 8, delta: 2, matching: false, a (10): [1, 2, 8, 9, 11, 13, 15, 16], b (7): [0, 2, 4, 5, 8, 10, 14]
+idx: 8, delta: 3, matching: false, a (11): [1, 2, 3, 6, 7, 8, 13, 15, 16], b (6): [0, 2, 5, 6, 7, 8, 12, 13, 14]
+idx: 8, delta: 4, matching: false, a (12): [1, 2, 3, 6, 7, 8, 9, 13, 15, 16], b (5): [2, 3, 7, 9, 10, 11, 12, 14, 15, 16]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 3, 4, 7, 12, 13], b (10): [1, 2, 8, 9, 11, 13, 15, 16]
+idx: 9, delta: 2, matching: false, a (11): [1, 2, 3, 6, 7, 8, 13, 15, 16], b (8): [2, 3, 6, 8, 11, 13]
+idx: 9, delta: 3, matching: false, a (12): [1, 2, 3, 6, 7, 8, 9, 13, 15, 16], b (7): [0, 2, 4, 5, 8, 10, 14]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [1, 2, 8, 9, 11, 13, 15, 16], b (11): [1, 2, 3, 6, 7, 8, 13, 15, 16]
+idx: 10, delta: 2, matching: false, a (12): [1, 2, 3, 6, 7, 8, 9, 13, 15, 16], b (9): [0, 3, 4, 7, 12, 13]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [1, 2, 3, 6, 7, 8, 13, 15, 16], b (12): [1, 2, 3, 6, 7, 8, 9, 13, 15, 16]
+idx: 11, delta: 0 --- found smudge!
+idx: 11 --- EXITING WITH true
+.####.#.####..#..
+.#.....#..#######
+######.###..#..##
+.##.....#..#.#.##
+##...#..#.####.##
+..##...#.####.###
+#.#..####...###..
+#.#.##..#.#...#..
+..##..#.#..#.#...
+#..##..#....##...
+.##.....##.#.#.##
+.###..###....#.##
+.###..####...#.##
+1203 (vert: 3, horiz: 12)
+
+idx: 0, delta: 0, matching: true, a (0): [1, 3, 4, 7], b (1): [1, 3, 4, 7]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 3, 4, 7], b (2): [0, 4, 6, 8]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 3, 5, 6, 7, 8], b (0): [1, 3, 4, 7]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 4, 6, 8], b (3): [1, 2, 3, 5, 6, 7, 8]
+idx: 2, delta: 2, matching: false, a (4): [4, 5, 7], b (1): [1, 3, 4, 7]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 4, 5, 7], b (0): [1, 3, 4, 7]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 3, 5, 6, 7, 8], b (4): [4, 5, 7]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 4, 5, 7], b (2): [0, 4, 6, 8]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 5, 6, 8], b (1): [1, 3, 4, 7]
+idx: 3, delta: 4, matching: false, a (7): [0, 2, 5, 6, 8], b (0): [1, 3, 4, 7]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [4, 5, 7], b (5): [0, 1, 4, 5, 7]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 5, 6, 8], b (3): [1, 2, 3, 5, 6, 7, 8]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 5, 6, 8], b (2): [0, 4, 6, 8]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 4, 5, 7], b (1): [1, 3, 4, 7]
+idx: 4, delta: 5, matching: false, a (9): [4, 5, 7], b (0): [1, 3, 4, 7]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 4, 5, 7], b (6): [0, 2, 5, 6, 8]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 5, 6, 8], b (4): [4, 5, 7]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 4, 5, 7], b (3): [1, 2, 3, 5, 6, 7, 8]
+idx: 5, delta: 4, matching: false, a (9): [4, 5, 7], b (2): [0, 4, 6, 8]
+idx: 5, delta: 5, matching: false, a (10): [1, 2, 3, 5, 6, 7, 8], b (1): [1, 3, 4, 7]
+idx: 5, delta: 6, matching: false, a (11): [0, 4, 6, 8], b (0): [1, 3, 4, 7]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: true, a (6): [0, 2, 5, 6, 8], b (7): [0, 2, 5, 6, 8]
+idx: 6, delta: 2, matching: true, a (8): [0, 1, 4, 5, 7], b (5): [0, 1, 4, 5, 7]
+idx: 6, delta: 3, matching: true, a (9): [4, 5, 7], b (4): [4, 5, 7]
+idx: 6, delta: 4, matching: true, a (10): [1, 2, 3, 5, 6, 7, 8], b (3): [1, 2, 3, 5, 6, 7, 8]
+idx: 6, delta: 5, matching: true, a (11): [0, 4, 6, 8], b (2): [0, 4, 6, 8]
+idx: 6, delta: 6, matching: false, a (12): [3, 4, 7], b (1): [1, 3, 4, 7]
+idx: 6, delta: 6 --- found smudge!
+idx: 6 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [2, 5, 6, 7, 8, 11], b (1): [0, 1, 3, 5, 8, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 3, 5, 8, 10], b (2): [3, 6, 7, 10]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 3, 10, 12], b (0): [2, 5, 6, 7, 8, 11]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 6, 7, 10], b (3): [0, 1, 3, 10, 12]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 4, 5, 8, 9, 11, 12], b (1): [0, 1, 3, 5, 8, 10]
+idx: 2, delta: 3, matching: false, a (5): [3, 4, 5, 6, 7, 8, 9, 10], b (0): [2, 5, 6, 7, 8, 11]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 3, 10, 12], b (4): [0, 1, 2, 4, 5, 8, 9, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [3, 4, 5, 6, 7, 8, 9, 10], b (2): [3, 6, 7, 10]
+idx: 3, delta: 3, matching: false, a (6): [2, 3, 6, 7, 10, 11], b (1): [0, 1, 3, 5, 8, 10]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 3, 4, 5, 8, 9, 10, 12], b (0): [2, 5, 6, 7, 8, 11]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 4, 5, 8, 9, 11, 12], b (5): [3, 4, 5, 6, 7, 8, 9, 10]
+idx: 4, delta: 2, matching: false, a (6): [2, 3, 6, 7, 10, 11], b (3): [0, 1, 3, 10, 12]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 3, 4, 5, 8, 9, 10, 12], b (2): [3, 6, 7, 10]
+idx: 4, delta: 4, matching: false, a (8): [2, 3, 6, 7, 10, 11], b (1): [0, 1, 3, 5, 8, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [3, 4, 5, 6, 7, 8, 9, 10], b (6): [2, 3, 6, 7, 10, 11]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 3, 4, 5, 8, 9, 10, 12], b (4): [0, 1, 2, 4, 5, 8, 9, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [2, 3, 6, 7, 10, 11], b (3): [0, 1, 3, 10, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [2, 3, 6, 7, 10, 11], b (7): [0, 1, 3, 4, 5, 8, 9, 10, 12]
+idx: 6, delta: 2, matching: false, a (8): [2, 3, 6, 7, 10, 11], b (5): [3, 4, 5, 6, 7, 8, 9, 10]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 3, 4, 5, 8, 9, 10, 12], b (8): [2, 3, 6, 7, 10, 11]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+..#..####..#.
+##.#.#..#.#..
+...#..##..#..
+##.#......#.#
+###.##..##.##
+...########..
+..##..##..##.
+##.###..###.#
+..##..##..##.
+7 (vert: 7, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [3, 5, 9, 10], b (1): [0, 1, 3, 4, 5, 8, 9, 10, 11]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 3, 4, 5, 8, 9, 10, 11], b (2): [0, 2, 4, 5, 11]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 4, 5, 6, 8, 11], b (0): [3, 5, 9, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 4, 5, 11], b (3): [1, 2, 4, 5, 6, 8, 11]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 4, 6, 7, 8, 11, 12], b (1): [0, 1, 3, 4, 5, 8, 9, 10, 11]
+idx: 2, delta: 3, matching: false, a (5): [0, 3, 4, 6, 9, 10], b (0): [3, 5, 9, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 4, 5, 6, 8, 11], b (4): [1, 2, 3, 4, 6, 7, 8, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [0, 3, 4, 6, 9, 10], b (2): [0, 2, 4, 5, 11]
+idx: 3, delta: 3, matching: false, a (6): [3, 4, 7, 9, 10, 12], b (1): [0, 1, 3, 4, 5, 8, 9, 10, 11]
+idx: 3, delta: 4, matching: false, a (7): [3, 4, 5, 8, 9, 10, 11], b (0): [3, 5, 9, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 4, 6, 7, 8, 11, 12], b (5): [0, 3, 4, 6, 9, 10]
+idx: 4, delta: 2, matching: false, a (6): [3, 4, 7, 9, 10, 12], b (3): [1, 2, 4, 5, 6, 8, 11]
+idx: 4, delta: 3, matching: false, a (7): [3, 4, 5, 8, 9, 10, 11], b (2): [0, 2, 4, 5, 11]
+idx: 4, delta: 4, matching: false, a (8): [0, 3, 6], b (1): [0, 1, 3, 4, 5, 8, 9, 10, 11]
+idx: 4, delta: 5, matching: false, a (9): [1, 3, 6, 8, 9, 10, 11], b (0): [3, 5, 9, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 3, 4, 6, 9, 10], b (6): [3, 4, 7, 9, 10, 12]
+idx: 5, delta: 2, matching: false, a (7): [3, 4, 5, 8, 9, 10, 11], b (4): [1, 2, 3, 4, 6, 7, 8, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [0, 3, 6], b (3): [1, 2, 4, 5, 6, 8, 11]
+idx: 5, delta: 4, matching: false, a (9): [1, 3, 6, 8, 9, 10, 11], b (2): [0, 2, 4, 5, 11]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 5, 7, 8, 9, 10, 11, 12], b (1): [0, 1, 3, 4, 5, 8, 9, 10, 11]
+idx: 5, delta: 6, matching: false, a (11): [2, 5, 7, 8, 11, 12], b (0): [3, 5, 9, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [3, 4, 7, 9, 10, 12], b (7): [3, 4, 5, 8, 9, 10, 11]
+idx: 6, delta: 2, matching: false, a (8): [0, 3, 6], b (5): [0, 3, 4, 6, 9, 10]
+idx: 6, delta: 3, matching: false, a (9): [1, 3, 6, 8, 9, 10, 11], b (4): [1, 2, 3, 4, 6, 7, 8, 11, 12]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 5, 7, 8, 9, 10, 11, 12], b (3): [1, 2, 4, 5, 6, 8, 11]
+idx: 6, delta: 5, matching: false, a (11): [2, 5, 7, 8, 11, 12], b (2): [0, 2, 4, 5, 11]
+idx: 6, delta: 6, matching: false, a (12): [1, 2, 5, 8, 11], b (1): [0, 1, 3, 4, 5, 8, 9, 10, 11]
+idx: 6, delta: 7, matching: false, a (13): [0, 5, 6, 9, 10], b (0): [3, 5, 9, 10]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [3, 4, 5, 8, 9, 10, 11], b (8): [0, 3, 6]
+idx: 7, delta: 2, matching: false, a (9): [1, 3, 6, 8, 9, 10, 11], b (6): [3, 4, 7, 9, 10, 12]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 5, 7, 8, 9, 10, 11, 12], b (5): [0, 3, 4, 6, 9, 10]
+idx: 7, delta: 4, matching: false, a (11): [2, 5, 7, 8, 11, 12], b (4): [1, 2, 3, 4, 6, 7, 8, 11, 12]
+idx: 7, delta: 5, matching: false, a (12): [1, 2, 5, 8, 11], b (3): [1, 2, 4, 5, 6, 8, 11]
+idx: 7, delta: 6, matching: false, a (13): [0, 5, 6, 9, 10], b (2): [0, 2, 4, 5, 11]
+idx: 7, delta: 7, matching: false, a (14): [0, 5, 6, 9, 10], b (1): [0, 1, 3, 4, 5, 8, 9, 10, 11]
+idx: 7, delta: 8, matching: false, a (15): [1, 2, 5, 8, 11], b (0): [3, 5, 9, 10]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 3, 6], b (9): [1, 3, 6, 8, 9, 10, 11]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 5, 7, 8, 9, 10, 11, 12], b (7): [3, 4, 5, 8, 9, 10, 11]
+idx: 8, delta: 3, matching: false, a (11): [2, 5, 7, 8, 11, 12], b (6): [3, 4, 7, 9, 10, 12]
+idx: 8, delta: 4, matching: false, a (12): [1, 2, 5, 8, 11], b (5): [0, 3, 4, 6, 9, 10]
+idx: 8, delta: 5, matching: false, a (13): [0, 5, 6, 9, 10], b (4): [1, 2, 3, 4, 6, 7, 8, 11, 12]
+idx: 8, delta: 6, matching: false, a (14): [0, 5, 6, 9, 10], b (3): [1, 2, 4, 5, 6, 8, 11]
+idx: 8, delta: 7, matching: false, a (15): [1, 2, 5, 8, 11], b (2): [0, 2, 4, 5, 11]
+idx: 8, delta: 8, matching: false, a (16): [2, 5, 7, 8, 11, 12], b (1): [0, 1, 3, 4, 5, 8, 9, 10, 11]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 3, 6, 8, 9, 10, 11], b (10): [0, 1, 5, 7, 8, 9, 10, 11, 12]
+idx: 9, delta: 2, matching: false, a (11): [2, 5, 7, 8, 11, 12], b (8): [0, 3, 6]
+idx: 9, delta: 3, matching: false, a (12): [1, 2, 5, 8, 11], b (7): [3, 4, 5, 8, 9, 10, 11]
+idx: 9, delta: 4, matching: false, a (13): [0, 5, 6, 9, 10], b (6): [3, 4, 7, 9, 10, 12]
+idx: 9, delta: 5, matching: false, a (14): [0, 5, 6, 9, 10], b (5): [0, 3, 4, 6, 9, 10]
+idx: 9, delta: 6, matching: false, a (15): [1, 2, 5, 8, 11], b (4): [1, 2, 3, 4, 6, 7, 8, 11, 12]
+idx: 9, delta: 7, matching: false, a (16): [2, 5, 7, 8, 11, 12], b (3): [1, 2, 4, 5, 6, 8, 11]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 5, 7, 8, 9, 10, 11, 12], b (11): [2, 5, 7, 8, 11, 12]
+idx: 10, delta: 2, matching: false, a (12): [1, 2, 5, 8, 11], b (9): [1, 3, 6, 8, 9, 10, 11]
+idx: 10, delta: 3, matching: false, a (13): [0, 5, 6, 9, 10], b (8): [0, 3, 6]
+idx: 10, delta: 4, matching: false, a (14): [0, 5, 6, 9, 10], b (7): [3, 4, 5, 8, 9, 10, 11]
+idx: 10, delta: 5, matching: false, a (15): [1, 2, 5, 8, 11], b (6): [3, 4, 7, 9, 10, 12]
+idx: 10, delta: 6, matching: false, a (16): [2, 5, 7, 8, 11, 12], b (5): [0, 3, 4, 6, 9, 10]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [2, 5, 7, 8, 11, 12], b (12): [1, 2, 5, 8, 11]
+idx: 11, delta: 2, matching: false, a (13): [0, 5, 6, 9, 10], b (10): [0, 1, 5, 7, 8, 9, 10, 11, 12]
+idx: 11, delta: 3, matching: false, a (14): [0, 5, 6, 9, 10], b (9): [1, 3, 6, 8, 9, 10, 11]
+idx: 11, delta: 4, matching: false, a (15): [1, 2, 5, 8, 11], b (8): [0, 3, 6]
+idx: 11, delta: 5, matching: false, a (16): [2, 5, 7, 8, 11, 12], b (7): [3, 4, 5, 8, 9, 10, 11]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [1, 2, 5, 8, 11], b (13): [0, 5, 6, 9, 10]
+idx: 12, delta: 2, matching: false, a (14): [0, 5, 6, 9, 10], b (11): [2, 5, 7, 8, 11, 12]
+idx: 12, delta: 3, matching: false, a (15): [1, 2, 5, 8, 11], b (10): [0, 1, 5, 7, 8, 9, 10, 11, 12]
+idx: 12, delta: 4, matching: false, a (16): [2, 5, 7, 8, 11, 12], b (9): [1, 3, 6, 8, 9, 10, 11]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: true, a (13): [0, 5, 6, 9, 10], b (14): [0, 5, 6, 9, 10]
+idx: 13, delta: 2, matching: true, a (15): [1, 2, 5, 8, 11], b (12): [1, 2, 5, 8, 11]
+idx: 13, delta: 3, matching: true, a (16): [2, 5, 7, 8, 11, 12], b (11): [2, 5, 7, 8, 11, 12]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [0, 5, 6, 9, 10], b (15): [1, 2, 5, 8, 11]
+idx: 14, delta: 2, matching: false, a (16): [2, 5, 7, 8, 11, 12], b (13): [0, 5, 6, 9, 10]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: false, a (15): [1, 2, 5, 8, 11], b (16): [2, 5, 7, 8, 11, 12]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 5, 8, 10, 13, 14], b (1): [1, 3, 4, 9, 10, 12, 15]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 3, 4, 9, 10, 12, 15], b (2): [2, 3, 4, 11, 12, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 4, 5, 6, 7, 8, 9], b (0): [1, 2, 5, 8, 10, 13, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 3, 4, 11, 12, 15, 16], b (3): [0, 1, 4, 5, 6, 7, 8, 9]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 4, 5, 6, 7], b (1): [1, 3, 4, 9, 10, 12, 15]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 3, 7, 10, 11, 12, 13, 14, 15, 16], b (0): [1, 2, 5, 8, 10, 13, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 4, 5, 6, 7, 8, 9], b (4): [1, 2, 3, 4, 5, 6, 7]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 3, 7, 10, 11, 12, 13, 14, 15, 16], b (2): [2, 3, 4, 11, 12, 15, 16]
+idx: 3, delta: 3, matching: false, a (6): [3, 4, 5, 8, 9, 13, 14], b (1): [1, 3, 4, 9, 10, 12, 15]
+idx: 3, delta: 4, matching: false, a (7): [4, 6, 10, 11, 16], b (0): [1, 2, 5, 8, 10, 13, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 4, 5, 6, 7], b (5): [0, 1, 2, 3, 7, 10, 11, 12, 13, 14, 15, 16]
+idx: 4, delta: 2, matching: false, a (6): [3, 4, 5, 8, 9, 13, 14], b (3): [0, 1, 4, 5, 6, 7, 8, 9]
+idx: 4, delta: 3, matching: false, a (7): [4, 6, 10, 11, 16], b (2): [2, 3, 4, 11, 12, 15, 16]
+idx: 4, delta: 4, matching: false, a (8): [1, 3, 4, 7, 9, 10, 11, 12, 15, 16], b (1): [1, 3, 4, 9, 10, 12, 15]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 5, 6, 7, 9, 10, 13, 14], b (0): [1, 2, 5, 8, 10, 13, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 3, 7, 10, 11, 12, 13, 14, 15, 16], b (6): [3, 4, 5, 8, 9, 13, 14]
+idx: 5, delta: 2, matching: false, a (7): [4, 6, 10, 11, 16], b (4): [1, 2, 3, 4, 5, 6, 7]
+idx: 5, delta: 3, matching: false, a (8): [1, 3, 4, 7, 9, 10, 11, 12, 15, 16], b (3): [0, 1, 4, 5, 6, 7, 8, 9]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 5, 6, 7, 9, 10, 13, 14], b (2): [2, 3, 4, 11, 12, 15, 16]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 5, 6, 7, 9, 10, 13, 14], b (1): [1, 3, 4, 9, 10, 12, 15]
+idx: 5, delta: 6, matching: false, a (11): [1, 2, 3, 4, 7, 9, 10, 11, 12, 15, 16], b (0): [1, 2, 5, 8, 10, 13, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [3, 4, 5, 8, 9, 13, 14], b (7): [4, 6, 10, 11, 16]
+idx: 6, delta: 2, matching: false, a (8): [1, 3, 4, 7, 9, 10, 11, 12, 15, 16], b (5): [0, 1, 2, 3, 7, 10, 11, 12, 13, 14, 15, 16]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 5, 6, 7, 9, 10, 13, 14], b (4): [1, 2, 3, 4, 5, 6, 7]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 5, 6, 7, 9, 10, 13, 14], b (3): [0, 1, 4, 5, 6, 7, 8, 9]
+idx: 6, delta: 5, matching: false, a (11): [1, 2, 3, 4, 7, 9, 10, 11, 12, 15, 16], b (2): [2, 3, 4, 11, 12, 15, 16]
+idx: 6, delta: 6, matching: false, a (12): [4, 6, 10, 11, 16], b (1): [1, 3, 4, 9, 10, 12, 15]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [4, 6, 10, 11, 16], b (8): [1, 3, 4, 7, 9, 10, 11, 12, 15, 16]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 5, 6, 7, 9, 10, 13, 14], b (6): [3, 4, 5, 8, 9, 13, 14]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 5, 6, 7, 9, 10, 13, 14], b (5): [0, 1, 2, 3, 7, 10, 11, 12, 13, 14, 15, 16]
+idx: 7, delta: 4, matching: false, a (11): [1, 2, 3, 4, 7, 9, 10, 11, 12, 15, 16], b (4): [1, 2, 3, 4, 5, 6, 7]
+idx: 7, delta: 5, matching: false, a (12): [4, 6, 10, 11, 16], b (3): [0, 1, 4, 5, 6, 7, 8, 9]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [1, 3, 4, 7, 9, 10, 11, 12, 15, 16], b (9): [0, 1, 5, 6, 7, 9, 10, 13, 14]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 5, 6, 7, 9, 10, 13, 14], b (7): [4, 6, 10, 11, 16]
+idx: 8, delta: 3, matching: false, a (11): [1, 2, 3, 4, 7, 9, 10, 11, 12, 15, 16], b (6): [3, 4, 5, 8, 9, 13, 14]
+idx: 8, delta: 4, matching: false, a (12): [4, 6, 10, 11, 16], b (5): [0, 1, 2, 3, 7, 10, 11, 12, 13, 14, 15, 16]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: true, a (9): [0, 1, 5, 6, 7, 9, 10, 13, 14], b (10): [0, 1, 5, 6, 7, 9, 10, 13, 14]
+idx: 9, delta: 2, matching: false, a (11): [1, 2, 3, 4, 7, 9, 10, 11, 12, 15, 16], b (8): [1, 3, 4, 7, 9, 10, 11, 12, 15, 16]
+idx: 9, delta: 2 --- found smudge!
+idx: 9, delta: 3, matching: true, a (12): [4, 6, 10, 11, 16], b (7): [4, 6, 10, 11, 16]
+idx: 9 --- EXITING WITH true
+.##..#..#.#..##..
+.#.##....##.#..#.
+..###......##..##
+##..######.......
+.#######.........
+####...#..#######
+...###..##...##..
+....#.#...##....#
+.#.##..#.####..##
+##...###.##..##..
+##...###.##..##..
+.####..#.####..##
+....#.#...##....#
+1000 (vert: 0, horiz: 10)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 3, 8, 9, 10, 12, 13, 15, 16], b (1): [3, 4, 7, 9, 10, 13]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [3, 4, 7, 9, 10, 13], b (2): [3, 7, 12, 13, 16]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 3, 5, 9, 11, 12, 15], b (0): [0, 1, 2, 3, 8, 9, 10, 12, 13, 15, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 7, 12, 13, 16], b (3): [0, 1, 3, 5, 9, 11, 12, 15]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 3, 4, 7, 8, 11, 16], b (1): [3, 4, 7, 9, 10, 13]
+idx: 2, delta: 3, matching: false, a (5): [4, 10, 11, 13, 14, 16], b (0): [0, 1, 2, 3, 8, 9, 10, 12, 13, 15, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 3, 5, 9, 11, 12, 15], b (4): [0, 1, 2, 3, 4, 7, 8, 11, 16]
+idx: 3, delta: 2, matching: false, a (5): [4, 10, 11, 13, 14, 16], b (2): [3, 7, 12, 13, 16]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 5, 9, 11, 12, 14], b (1): [3, 4, 7, 9, 10, 13]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2, 3, 4, 6, 11, 13, 14, 16], b (0): [0, 1, 2, 3, 8, 9, 10, 12, 13, 15, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 3, 4, 7, 8, 11, 16], b (5): [4, 10, 11, 13, 14, 16]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 5, 9, 11, 12, 14], b (3): [0, 1, 3, 5, 9, 11, 12, 15]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 2, 3, 4, 6, 11, 13, 14, 16], b (2): [3, 7, 12, 13, 16]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 3, 4, 6, 11, 13, 14, 15, 16], b (1): [3, 4, 7, 9, 10, 13]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 5, 9, 11, 12, 14], b (0): [0, 1, 2, 3, 8, 9, 10, 12, 13, 15, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [4, 10, 11, 13, 14, 16], b (6): [0, 1, 2, 5, 9, 11, 12, 14]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2, 3, 4, 6, 11, 13, 14, 16], b (4): [0, 1, 2, 3, 4, 7, 8, 11, 16]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 3, 4, 6, 11, 13, 14, 15, 16], b (3): [0, 1, 3, 5, 9, 11, 12, 15]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 5, 9, 11, 12, 14], b (2): [3, 7, 12, 13, 16]
+idx: 5, delta: 5, matching: false, a (10): [4, 10, 11, 13, 14, 16], b (1): [3, 4, 7, 9, 10, 13]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 5, 9, 11, 12, 14], b (7): [0, 1, 2, 3, 4, 6, 11, 13, 14, 16]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 3, 4, 6, 11, 13, 14, 15, 16], b (5): [4, 10, 11, 13, 14, 16]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 5, 9, 11, 12, 14], b (4): [0, 1, 2, 3, 4, 7, 8, 11, 16]
+idx: 6, delta: 4, matching: false, a (10): [4, 10, 11, 13, 14, 16], b (3): [0, 1, 3, 5, 9, 11, 12, 15]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 2, 3, 4, 6, 11, 13, 14, 16], b (8): [0, 1, 2, 3, 4, 6, 11, 13, 14, 15, 16]
+idx: 7, delta: 0 --- found smudge!
+idx: 7, delta: 2, matching: true, a (9): [0, 1, 2, 5, 9, 11, 12, 14], b (6): [0, 1, 2, 5, 9, 11, 12, 14]
+idx: 7, delta: 3, matching: true, a (10): [4, 10, 11, 13, 14, 16], b (5): [4, 10, 11, 13, 14, 16]
+idx: 7 --- EXITING WITH true
+idx: 0, delta: 0, matching: true, a (0): [0, 3, 4, 6, 7, 8, 9], b (1): [0, 3, 4, 6, 7, 8, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 3, 4, 6, 7, 8, 9], b (2): [0, 4, 6, 7, 8, 9]
+idx: 1, delta: 0 --- found smudge!
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 4, 7, 8], b (0): [0, 3, 4, 6, 7, 8, 9]
+idx: 1, delta: 2 --- found smudge twice!
+idx: 2, delta: 0, matching: false, a (2): [0, 4, 6, 7, 8, 9], b (3): [0, 1, 2, 3, 4, 7, 8]
+idx: 2, delta: 2, matching: false, a (4): [1, 4, 5, 7, 8, 10], b (1): [0, 3, 4, 6, 7, 8, 9]
+idx: 2, delta: 3, matching: false, a (5): [3, 6, 9], b (0): [0, 3, 4, 6, 7, 8, 9]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 3, 4, 7, 8], b (4): [1, 4, 5, 7, 8, 10]
+idx: 3, delta: 2, matching: false, a (5): [3, 6, 9], b (2): [0, 4, 6, 7, 8, 9]
+idx: 3, delta: 3, matching: false, a (6): [7, 8], b (1): [0, 3, 4, 6, 7, 8, 9]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 4], b (0): [0, 3, 4, 6, 7, 8, 9]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 4, 5, 7, 8, 10], b (5): [3, 6, 9]
+idx: 4, delta: 2, matching: false, a (6): [7, 8], b (3): [0, 1, 2, 3, 4, 7, 8]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 4], b (2): [0, 4, 6, 7, 8, 9]
+idx: 4, delta: 4, matching: false, a (8): [0, 4], b (1): [0, 3, 4, 6, 7, 8, 9]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 3, 6, 9], b (0): [0, 3, 4, 6, 7, 8, 9]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [3, 6, 9], b (6): [7, 8]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 4], b (4): [1, 4, 5, 7, 8, 10]
+idx: 5, delta: 3, matching: false, a (8): [0, 4], b (3): [0, 1, 2, 3, 4, 7, 8]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 3, 6, 9], b (2): [0, 4, 6, 7, 8, 9]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 5, 10], b (1): [0, 3, 4, 6, 7, 8, 9]
+idx: 5, delta: 6, matching: false, a (11): [3, 4, 5, 6, 7, 8, 9, 10], b (0): [0, 3, 4, 6, 7, 8, 9]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [7, 8], b (7): [1, 2, 4]
+idx: 6, delta: 2, matching: false, a (8): [0, 4], b (5): [3, 6, 9]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 3, 6, 9], b (4): [1, 4, 5, 7, 8, 10]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 5, 10], b (3): [0, 1, 2, 3, 4, 7, 8]
+idx: 6, delta: 5, matching: false, a (11): [3, 4, 5, 6, 7, 8, 9, 10], b (2): [0, 4, 6, 7, 8, 9]
+idx: 6, delta: 6, matching: false, a (12): [0, 2, 3, 6, 9], b (1): [0, 3, 4, 6, 7, 8, 9]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 2, 5, 7, 8, 10], b (0): [0, 3, 4, 6, 7, 8, 9]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 4], b (8): [0, 4]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 3, 6, 9], b (6): [7, 8]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 5, 10], b (5): [3, 6, 9]
+idx: 7, delta: 4, matching: false, a (11): [3, 4, 5, 6, 7, 8, 9, 10], b (4): [1, 4, 5, 7, 8, 10]
+idx: 7, delta: 5, matching: false, a (12): [0, 2, 3, 6, 9], b (3): [0, 1, 2, 3, 4, 7, 8]
+idx: 7, delta: 6, matching: false, a (13): [0, 1, 2, 5, 7, 8, 10], b (2): [0, 4, 6, 7, 8, 9]
+idx: 7, delta: 7, matching: false, a (14): [5, 6, 7, 8, 9, 10], b (1): [0, 3, 4, 6, 7, 8, 9]
+idx: 7, delta: 8, matching: false, a (15): [0, 3, 8], b (0): [0, 3, 4, 6, 7, 8, 9]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 4], b (9): [0, 1, 3, 6, 9]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 5, 10], b (7): [1, 2, 4]
+idx: 8, delta: 3, matching: false, a (11): [3, 4, 5, 6, 7, 8, 9, 10], b (6): [7, 8]
+idx: 8, delta: 4, matching: false, a (12): [0, 2, 3, 6, 9], b (5): [3, 6, 9]
+idx: 8, delta: 5, matching: false, a (13): [0, 1, 2, 5, 7, 8, 10], b (4): [1, 4, 5, 7, 8, 10]
+idx: 8, delta: 6, matching: false, a (14): [5, 6, 7, 8, 9, 10], b (3): [0, 1, 2, 3, 4, 7, 8]
+idx: 8, delta: 7, matching: false, a (15): [0, 3, 8], b (2): [0, 4, 6, 7, 8, 9]
+idx: 8, delta: 8, matching: false, a (16): [0, 2, 4, 5, 7, 8, 10], b (1): [0, 3, 4, 6, 7, 8, 9]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 3, 6, 9], b (10): [0, 1, 5, 10]
+idx: 9, delta: 2, matching: false, a (11): [3, 4, 5, 6, 7, 8, 9, 10], b (8): [0, 4]
+idx: 9, delta: 3, matching: false, a (12): [0, 2, 3, 6, 9], b (7): [1, 2, 4]
+idx: 9, delta: 4, matching: false, a (13): [0, 1, 2, 5, 7, 8, 10], b (6): [7, 8]
+idx: 9, delta: 5, matching: false, a (14): [5, 6, 7, 8, 9, 10], b (5): [3, 6, 9]
+idx: 9, delta: 6, matching: false, a (15): [0, 3, 8], b (4): [1, 4, 5, 7, 8, 10]
+idx: 9, delta: 7, matching: false, a (16): [0, 2, 4, 5, 7, 8, 10], b (3): [0, 1, 2, 3, 4, 7, 8]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 5, 10], b (11): [3, 4, 5, 6, 7, 8, 9, 10]
+idx: 10, delta: 2, matching: false, a (12): [0, 2, 3, 6, 9], b (9): [0, 1, 3, 6, 9]
+idx: 10, delta: 3, matching: false, a (13): [0, 1, 2, 5, 7, 8, 10], b (8): [0, 4]
+idx: 10, delta: 4, matching: false, a (14): [5, 6, 7, 8, 9, 10], b (7): [1, 2, 4]
+idx: 10, delta: 5, matching: false, a (15): [0, 3, 8], b (6): [7, 8]
+idx: 10, delta: 6, matching: false, a (16): [0, 2, 4, 5, 7, 8, 10], b (5): [3, 6, 9]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [3, 4, 5, 6, 7, 8, 9, 10], b (12): [0, 2, 3, 6, 9]
+idx: 11, delta: 2, matching: false, a (13): [0, 1, 2, 5, 7, 8, 10], b (10): [0, 1, 5, 10]
+idx: 11, delta: 3, matching: false, a (14): [5, 6, 7, 8, 9, 10], b (9): [0, 1, 3, 6, 9]
+idx: 11, delta: 4, matching: false, a (15): [0, 3, 8], b (8): [0, 4]
+idx: 11, delta: 5, matching: false, a (16): [0, 2, 4, 5, 7, 8, 10], b (7): [1, 2, 4]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 2, 3, 6, 9], b (13): [0, 1, 2, 5, 7, 8, 10]
+idx: 12, delta: 2, matching: false, a (14): [5, 6, 7, 8, 9, 10], b (11): [3, 4, 5, 6, 7, 8, 9, 10]
+idx: 12, delta: 3, matching: false, a (15): [0, 3, 8], b (10): [0, 1, 5, 10]
+idx: 12, delta: 4, matching: false, a (16): [0, 2, 4, 5, 7, 8, 10], b (9): [0, 1, 3, 6, 9]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 1, 2, 5, 7, 8, 10], b (14): [5, 6, 7, 8, 9, 10]
+idx: 13, delta: 2, matching: false, a (15): [0, 3, 8], b (12): [0, 2, 3, 6, 9]
+idx: 13, delta: 3, matching: false, a (16): [0, 2, 4, 5, 7, 8, 10], b (11): [3, 4, 5, 6, 7, 8, 9, 10]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [5, 6, 7, 8, 9, 10], b (15): [0, 3, 8]
+idx: 14, delta: 2, matching: false, a (16): [0, 2, 4, 5, 7, 8, 10], b (13): [0, 1, 2, 5, 7, 8, 10]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: false, a (15): [0, 3, 8], b (16): [0, 2, 4, 5, 7, 8, 10]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+#..##.####.
+#..##.####.
+#...#.####.
+#####..##..
+.#..##.##.#
+...#..#..#.
+.......##..
+.##.#......
+#...#......
+##.#..#..#.
+##...#....#
+...########
+#.##..#..#.
+###..#.##.#
+.....######
+#..#....#..
+#.#.##.##.#
+8 (vert: 8, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 5, 6, 8, 9, 10, 13, 14], b (1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 13]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 13], b (2): [1, 4, 6, 7, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 13, 14], b (0): [0, 5, 6, 8, 9, 10, 13, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 4, 6, 7, 11, 12], b (3): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 13, 14]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 4, 5, 6, 8, 10, 13], b (1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 13]
+idx: 2, delta: 3, matching: false, a (5): [2, 3, 8, 10, 13], b (0): [0, 5, 6, 8, 9, 10, 13, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 13, 14], b (4): [0, 1, 4, 5, 6, 8, 10, 13]
+idx: 3, delta: 2, matching: false, a (5): [2, 3, 8, 10, 13], b (2): [1, 4, 6, 7, 11, 12]
+idx: 3, delta: 3, matching: false, a (6): [0, 5, 7, 10, 13], b (1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 13]
+idx: 3, delta: 4, matching: false, a (7): [1, 4, 7, 8, 10, 11, 12, 13], b (0): [0, 5, 6, 8, 9, 10, 13, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 4, 5, 6, 8, 10, 13], b (5): [2, 3, 8, 10, 13]
+idx: 4, delta: 2, matching: false, a (6): [0, 5, 7, 10, 13], b (3): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 13, 14]
+idx: 4, delta: 3, matching: false, a (7): [1, 4, 7, 8, 10, 11, 12, 13], b (2): [1, 4, 6, 7, 11, 12]
+idx: 4, delta: 4, matching: false, a (8): [2, 3, 8, 9, 11, 12, 14], b (1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 13]
+idx: 4, delta: 5, matching: false, a (9): [1, 4, 7, 8, 10, 11, 12, 13], b (0): [0, 5, 6, 8, 9, 10, 13, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 3, 8, 10, 13], b (6): [0, 5, 7, 10, 13]
+idx: 5, delta: 2, matching: false, a (7): [1, 4, 7, 8, 10, 11, 12, 13], b (4): [0, 1, 4, 5, 6, 8, 10, 13]
+idx: 5, delta: 3, matching: false, a (8): [2, 3, 8, 9, 11, 12, 14], b (3): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 13, 14]
+idx: 5, delta: 4, matching: false, a (9): [1, 4, 7, 8, 10, 11, 12, 13], b (2): [1, 4, 6, 7, 11, 12]
+idx: 5, delta: 5, matching: false, a (10): [1, 2, 3, 4, 7, 10, 13], b (1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 13]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 5, 7, 10, 13], b (7): [1, 4, 7, 8, 10, 11, 12, 13]
+idx: 6, delta: 2, matching: false, a (8): [2, 3, 8, 9, 11, 12, 14], b (5): [2, 3, 8, 10, 13]
+idx: 6, delta: 3, matching: false, a (9): [1, 4, 7, 8, 10, 11, 12, 13], b (4): [0, 1, 4, 5, 6, 8, 10, 13]
+idx: 6, delta: 4, matching: false, a (10): [1, 2, 3, 4, 7, 10, 13], b (3): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 13, 14]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 4, 7, 8, 10, 11, 12, 13], b (8): [2, 3, 8, 9, 11, 12, 14]
+idx: 7, delta: 2, matching: false, a (9): [1, 4, 7, 8, 10, 11, 12, 13], b (6): [0, 5, 7, 10, 13]
+idx: 7, delta: 3, matching: false, a (10): [1, 2, 3, 4, 7, 10, 13], b (5): [2, 3, 8, 10, 13]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [2, 3, 8, 9, 11, 12, 14], b (9): [1, 4, 7, 8, 10, 11, 12, 13]
+idx: 8, delta: 2, matching: false, a (10): [1, 2, 3, 4, 7, 10, 13], b (7): [1, 4, 7, 8, 10, 11, 12, 13]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 4, 7, 8, 10, 11, 12, 13], b (10): [1, 2, 3, 4, 7, 10, 13]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 4, 6], b (1): [1, 2, 3, 4, 7, 9, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 3, 4, 7, 9, 10], b (2): [1, 3, 5, 8, 10]
+idx: 1, delta: 2, matching: false, a (3): [1, 3, 5, 8, 10], b (0): [0, 1, 4, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: true, a (2): [1, 3, 5, 8, 10], b (3): [1, 3, 5, 8, 10]
+idx: 2, delta: 2, matching: true, a (4): [1, 2, 3, 4, 7, 9, 10], b (1): [1, 2, 3, 4, 7, 9, 10]
+idx: 2, delta: 3, matching: true, a (5): [0, 1, 4, 6], b (0): [0, 1, 4, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 3, 5, 8, 10], b (4): [1, 2, 3, 4, 7, 9, 10]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 4, 6], b (2): [1, 3, 5, 8, 10]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 3, 4], b (1): [1, 2, 3, 4, 7, 9, 10]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 3, 6, 7, 9, 10], b (0): [0, 1, 4, 6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 4, 7, 9, 10], b (5): [0, 1, 4, 6]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 3, 4], b (3): [1, 3, 5, 8, 10]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 3, 6, 7, 9, 10], b (2): [1, 3, 5, 8, 10]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 4, 5, 7, 8, 9], b (1): [1, 2, 3, 4, 7, 9, 10]
+idx: 4, delta: 5, matching: false, a (9): [0, 3, 8], b (0): [0, 1, 4, 6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 4, 6], b (6): [0, 1, 2, 3, 4]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 3, 6, 7, 9, 10], b (4): [1, 2, 3, 4, 7, 9, 10]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 4, 5, 7, 8, 9], b (3): [1, 3, 5, 8, 10]
+idx: 5, delta: 4, matching: false, a (9): [0, 3, 8], b (2): [1, 3, 5, 8, 10]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 3, 4, 5, 6, 7, 9, 10], b (1): [1, 2, 3, 4, 7, 9, 10]
+idx: 5, delta: 6, matching: false, a (11): [1, 2, 3, 7, 8, 9], b (0): [0, 1, 4, 6]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 3, 4], b (7): [1, 2, 3, 6, 7, 9, 10]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 4, 5, 7, 8, 9], b (5): [0, 1, 4, 6]
+idx: 6, delta: 3, matching: false, a (9): [0, 3, 8], b (4): [1, 2, 3, 4, 7, 9, 10]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 3, 4, 5, 6, 7, 9, 10], b (3): [1, 3, 5, 8, 10]
+idx: 6, delta: 5, matching: false, a (11): [1, 2, 3, 7, 8, 9], b (2): [1, 3, 5, 8, 10]
+idx: 6, delta: 6, matching: false, a (12): [2, 3, 7, 8, 9], b (1): [1, 2, 3, 4, 7, 9, 10]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 3, 4, 5, 6, 7, 9, 10], b (0): [0, 1, 4, 6]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 3, 6, 7, 9, 10], b (8): [0, 1, 4, 5, 7, 8, 9]
+idx: 7, delta: 2, matching: false, a (9): [0, 3, 8], b (6): [0, 1, 2, 3, 4]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 3, 4, 5, 6, 7, 9, 10], b (5): [0, 1, 4, 6]
+idx: 7, delta: 4, matching: false, a (11): [1, 2, 3, 7, 8, 9], b (4): [1, 2, 3, 4, 7, 9, 10]
+idx: 7, delta: 5, matching: false, a (12): [2, 3, 7, 8, 9], b (3): [1, 3, 5, 8, 10]
+idx: 7, delta: 6, matching: false, a (13): [0, 1, 3, 4, 5, 6, 7, 9, 10], b (2): [1, 3, 5, 8, 10]
+idx: 7, delta: 7, matching: false, a (14): [0, 3, 8], b (1): [1, 2, 3, 4, 7, 9, 10]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 4, 5, 7, 8, 9], b (9): [0, 3, 8]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 3, 4, 5, 6, 7, 9, 10], b (7): [1, 2, 3, 6, 7, 9, 10]
+idx: 8, delta: 3, matching: false, a (11): [1, 2, 3, 7, 8, 9], b (6): [0, 1, 2, 3, 4]
+idx: 8, delta: 4, matching: false, a (12): [2, 3, 7, 8, 9], b (5): [0, 1, 4, 6]
+idx: 8, delta: 5, matching: false, a (13): [0, 1, 3, 4, 5, 6, 7, 9, 10], b (4): [1, 2, 3, 4, 7, 9, 10]
+idx: 8, delta: 6, matching: false, a (14): [0, 3, 8], b (3): [1, 3, 5, 8, 10]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 3, 8], b (10): [0, 1, 3, 4, 5, 6, 7, 9, 10]
+idx: 9, delta: 2, matching: false, a (11): [1, 2, 3, 7, 8, 9], b (8): [0, 1, 4, 5, 7, 8, 9]
+idx: 9, delta: 3, matching: false, a (12): [2, 3, 7, 8, 9], b (7): [1, 2, 3, 6, 7, 9, 10]
+idx: 9, delta: 4, matching: false, a (13): [0, 1, 3, 4, 5, 6, 7, 9, 10], b (6): [0, 1, 2, 3, 4]
+idx: 9, delta: 5, matching: false, a (14): [0, 3, 8], b (5): [0, 1, 4, 6]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 3, 4, 5, 6, 7, 9, 10], b (11): [1, 2, 3, 7, 8, 9]
+idx: 10, delta: 2, matching: false, a (12): [2, 3, 7, 8, 9], b (9): [0, 3, 8]
+idx: 10, delta: 3, matching: false, a (13): [0, 1, 3, 4, 5, 6, 7, 9, 10], b (8): [0, 1, 4, 5, 7, 8, 9]
+idx: 10, delta: 4, matching: false, a (14): [0, 3, 8], b (7): [1, 2, 3, 6, 7, 9, 10]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [1, 2, 3, 7, 8, 9], b (12): [2, 3, 7, 8, 9]
+idx: 11, delta: 0 --- found smudge!
+idx: 11, delta: 2, matching: true, a (13): [0, 1, 3, 4, 5, 6, 7, 9, 10], b (10): [0, 1, 3, 4, 5, 6, 7, 9, 10]
+idx: 11, delta: 3, matching: true, a (14): [0, 3, 8], b (9): [0, 3, 8]
+idx: 11 --- EXITING WITH true
+##..#.#....
+.####..#.##
+.#.#.#..#.#
+.#.#.#..#.#
+.####..#.##
+##..#.#....
+#####......
+.###..##.##
+##..##.###.
+#..#....#..
+##.#####.##
+.###...###.
+..##...###.
+##.#####.##
+#..#....#..
+1200 (vert: 0, horiz: 12)
+
+idx: 0, delta: 0, matching: true, a (0): [1, 7, 9, 10, 12, 13], b (1): [1, 7, 9, 10, 12, 13]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 7, 9, 10, 12, 13], b (2): [0, 1, 4, 6, 7, 8, 10, 13, 14]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 4, 5, 10], b (0): [1, 7, 9, 10, 12, 13]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 4, 6, 7, 8, 10, 13, 14], b (3): [0, 1, 2, 4, 5, 10]
+idx: 2, delta: 2, matching: false, a (4): [0, 3, 4, 6, 8, 9, 10, 11], b (1): [1, 7, 9, 10, 12, 13]
+idx: 2, delta: 3, matching: false, a (5): [3, 4, 7, 8, 11, 12, 13], b (0): [1, 7, 9, 10, 12, 13]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 4, 5, 10], b (4): [0, 3, 4, 6, 8, 9, 10, 11]
+idx: 3, delta: 2, matching: false, a (5): [3, 4, 7, 8, 11, 12, 13], b (2): [0, 1, 4, 6, 7, 8, 10, 13, 14]
+idx: 3, delta: 3, matching: false, a (6): [2, 5, 8, 10, 12, 14], b (1): [1, 7, 9, 10, 12, 13]
+idx: 3, delta: 4, matching: false, a (7): [2, 5, 8, 10, 12, 14], b (0): [1, 7, 9, 10, 12, 13]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 3, 4, 6, 8, 9, 10, 11], b (5): [3, 4, 7, 8, 11, 12, 13]
+idx: 4, delta: 2, matching: false, a (6): [2, 5, 8, 10, 12, 14], b (3): [0, 1, 2, 4, 5, 10]
+idx: 4, delta: 3, matching: false, a (7): [2, 5, 8, 10, 12, 14], b (2): [0, 1, 4, 6, 7, 8, 10, 13, 14]
+idx: 4, delta: 4, matching: false, a (8): [3, 4, 7, 11, 12, 13], b (1): [1, 7, 9, 10, 12, 13]
+idx: 4, delta: 5, matching: false, a (9): [0, 3, 4, 6, 8, 9, 10, 11], b (0): [1, 7, 9, 10, 12, 13]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [3, 4, 7, 8, 11, 12, 13], b (6): [2, 5, 8, 10, 12, 14]
+idx: 5, delta: 2, matching: false, a (7): [2, 5, 8, 10, 12, 14], b (4): [0, 3, 4, 6, 8, 9, 10, 11]
+idx: 5, delta: 3, matching: false, a (8): [3, 4, 7, 11, 12, 13], b (3): [0, 1, 2, 4, 5, 10]
+idx: 5, delta: 4, matching: false, a (9): [0, 3, 4, 6, 8, 9, 10, 11], b (2): [0, 1, 4, 6, 7, 8, 10, 13, 14]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 2, 4, 5, 10], b (1): [1, 7, 9, 10, 12, 13]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 4, 6, 7, 8, 10, 13, 14], b (0): [1, 7, 9, 10, 12, 13]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: true, a (6): [2, 5, 8, 10, 12, 14], b (7): [2, 5, 8, 10, 12, 14]
+idx: 6, delta: 2, matching: false, a (8): [3, 4, 7, 11, 12, 13], b (5): [3, 4, 7, 8, 11, 12, 13]
+idx: 6, delta: 2 --- found smudge!
+idx: 6, delta: 3, matching: true, a (9): [0, 3, 4, 6, 8, 9, 10, 11], b (4): [0, 3, 4, 6, 8, 9, 10, 11]
+idx: 6, delta: 4, matching: true, a (10): [0, 1, 2, 4, 5, 10], b (3): [0, 1, 2, 4, 5, 10]
+idx: 6, delta: 5, matching: true, a (11): [0, 1, 4, 6, 7, 8, 10, 13, 14], b (2): [0, 1, 4, 6, 7, 8, 10, 13, 14]
+idx: 6, delta: 6, matching: true, a (12): [1, 7, 9, 10, 12, 13], b (1): [1, 7, 9, 10, 12, 13]
+idx: 6 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [2, 3, 4, 9, 10, 11], b (1): [0, 1, 2, 3, 10, 11, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 3, 10, 11, 12], b (2): [3, 6, 7, 10]
+idx: 1, delta: 2, matching: false, a (3): [4, 5, 8, 9], b (0): [2, 3, 4, 9, 10, 11]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 6, 7, 10], b (3): [4, 5, 8, 9]
+idx: 2, delta: 2, matching: false, a (4): [2, 3, 4, 5, 8, 9, 10, 11], b (1): [0, 1, 2, 3, 10, 11, 12]
+idx: 2, delta: 3, matching: false, a (5): [3, 6, 7, 10], b (0): [2, 3, 4, 9, 10, 11]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [4, 5, 8, 9], b (4): [2, 3, 4, 5, 8, 9, 10, 11]
+idx: 3, delta: 2, matching: true, a (5): [3, 6, 7, 10], b (2): [3, 6, 7, 10]
+idx: 3, delta: 3, matching: false, a (6): [2, 4, 9, 11], b (1): [0, 1, 2, 3, 10, 11, 12]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2, 5, 8, 11, 12], b (0): [2, 3, 4, 9, 10, 11]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 3, 4, 5, 8, 9, 10, 11], b (5): [3, 6, 7, 10]
+idx: 4, delta: 2, matching: false, a (6): [2, 4, 9, 11], b (3): [4, 5, 8, 9]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 2, 5, 8, 11, 12], b (2): [3, 6, 7, 10]
+idx: 4, delta: 4, matching: false, a (8): [2, 4, 5, 6, 7, 9, 11], b (1): [0, 1, 2, 3, 10, 11, 12]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 4, 9, 12], b (0): [2, 3, 4, 9, 10, 11]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [3, 6, 7, 10], b (6): [2, 4, 9, 11]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2, 5, 8, 11, 12], b (4): [2, 3, 4, 5, 8, 9, 10, 11]
+idx: 5, delta: 3, matching: false, a (8): [2, 4, 5, 6, 7, 9, 11], b (3): [4, 5, 8, 9]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 4, 9, 12], b (2): [3, 6, 7, 10]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 2, 3, 4, 6, 7, 9, 10, 11, 12], b (1): [0, 1, 2, 3, 10, 11, 12]
+idx: 5, delta: 6, matching: false, a (11): [4, 5, 8, 9], b (0): [2, 3, 4, 9, 10, 11]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [2, 4, 9, 11], b (7): [0, 1, 2, 5, 8, 11, 12]
+idx: 6, delta: 2, matching: false, a (8): [2, 4, 5, 6, 7, 9, 11], b (5): [3, 6, 7, 10]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 4, 9, 12], b (4): [2, 3, 4, 5, 8, 9, 10, 11]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 2, 3, 4, 6, 7, 9, 10, 11, 12], b (3): [4, 5, 8, 9]
+idx: 6, delta: 5, matching: false, a (11): [4, 5, 8, 9], b (2): [3, 6, 7, 10]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 5, 6, 7, 8, 12], b (1): [0, 1, 2, 3, 10, 11, 12]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 2, 5, 8, 11, 12], b (0): [2, 3, 4, 9, 10, 11]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 2, 5, 8, 11, 12], b (8): [2, 4, 5, 6, 7, 9, 11]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 4, 9, 12], b (6): [2, 4, 9, 11]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 2, 3, 4, 6, 7, 9, 10, 11, 12], b (5): [3, 6, 7, 10]
+idx: 7, delta: 4, matching: false, a (11): [4, 5, 8, 9], b (4): [2, 3, 4, 5, 8, 9, 10, 11]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 5, 6, 7, 8, 12], b (3): [4, 5, 8, 9]
+idx: 7, delta: 6, matching: false, a (13): [0, 1, 2, 5, 8, 11, 12], b (2): [3, 6, 7, 10]
+idx: 7, delta: 7, matching: false, a (14): [2, 6, 7, 11], b (1): [0, 1, 2, 3, 10, 11, 12]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [2, 4, 5, 6, 7, 9, 11], b (9): [0, 1, 4, 9, 12]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 2, 3, 4, 6, 7, 9, 10, 11, 12], b (7): [0, 1, 2, 5, 8, 11, 12]
+idx: 8, delta: 3, matching: false, a (11): [4, 5, 8, 9], b (6): [2, 4, 9, 11]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 5, 6, 7, 8, 12], b (5): [3, 6, 7, 10]
+idx: 8, delta: 5, matching: false, a (13): [0, 1, 2, 5, 8, 11, 12], b (4): [2, 3, 4, 5, 8, 9, 10, 11]
+idx: 8, delta: 6, matching: false, a (14): [2, 6, 7, 11], b (3): [4, 5, 8, 9]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 4, 9, 12], b (10): [0, 1, 2, 3, 4, 6, 7, 9, 10, 11, 12]
+idx: 9, delta: 2, matching: false, a (11): [4, 5, 8, 9], b (8): [2, 4, 5, 6, 7, 9, 11]
+idx: 9, delta: 3, matching: false, a (12): [0, 1, 5, 6, 7, 8, 12], b (7): [0, 1, 2, 5, 8, 11, 12]
+idx: 9, delta: 4, matching: false, a (13): [0, 1, 2, 5, 8, 11, 12], b (6): [2, 4, 9, 11]
+idx: 9, delta: 5, matching: false, a (14): [2, 6, 7, 11], b (5): [3, 6, 7, 10]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 2, 3, 4, 6, 7, 9, 10, 11, 12], b (11): [4, 5, 8, 9]
+idx: 10, delta: 2, matching: false, a (12): [0, 1, 5, 6, 7, 8, 12], b (9): [0, 1, 4, 9, 12]
+idx: 10, delta: 3, matching: false, a (13): [0, 1, 2, 5, 8, 11, 12], b (8): [2, 4, 5, 6, 7, 9, 11]
+idx: 10, delta: 4, matching: false, a (14): [2, 6, 7, 11], b (7): [0, 1, 2, 5, 8, 11, 12]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [4, 5, 8, 9], b (12): [0, 1, 5, 6, 7, 8, 12]
+idx: 11, delta: 2, matching: false, a (13): [0, 1, 2, 5, 8, 11, 12], b (10): [0, 1, 2, 3, 4, 6, 7, 9, 10, 11, 12]
+idx: 11, delta: 3, matching: false, a (14): [2, 6, 7, 11], b (9): [0, 1, 4, 9, 12]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 1, 5, 6, 7, 8, 12], b (13): [0, 1, 2, 5, 8, 11, 12]
+idx: 12, delta: 2, matching: false, a (14): [2, 6, 7, 11], b (11): [4, 5, 8, 9]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 1, 2, 5, 8, 11, 12], b (14): [2, 6, 7, 11]
+idx: 13 --- EXITING WITH false
+idx: 14 --- EXITING WITH false
+..###....###.
+####......###
+...#..##..#..
+....##..##...
+..####..####.
+...#..##..#..
+..#.#....#.#.
+###..#..#..##
+..#.####.#.#.
+##..#....#..#
+#####.##.####
+....##..##...
+##...####...#
+###..#..#..##
+..#...##...#.
+7 (vert: 7, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 3, 5, 6, 7, 8, 14, 16], b (1): [0, 1, 2, 3, 4, 6, 9, 13, 15, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 3, 4, 6, 9, 13, 15, 16], b (2): [2, 3, 7, 8, 9, 11, 12, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [0, 5, 6, 9, 10, 11, 14, 16], b (0): [0, 2, 3, 5, 6, 7, 8, 14, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 3, 7, 8, 9, 11, 12, 15, 16], b (3): [0, 5, 6, 9, 10, 11, 14, 16]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 4, 6, 7, 9, 13, 14, 16], b (1): [0, 1, 2, 3, 4, 6, 9, 13, 15, 16]
+idx: 2, delta: 3, matching: false, a (5): [1, 4, 6, 7, 9, 10, 12, 13, 14, 15, 16], b (0): [0, 2, 3, 5, 6, 7, 8, 14, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 5, 6, 9, 10, 11, 14, 16], b (4): [1, 2, 3, 4, 6, 7, 9, 13, 14, 16]
+idx: 3, delta: 2, matching: false, a (5): [1, 4, 6, 7, 9, 10, 12, 13, 14, 15, 16], b (2): [2, 3, 7, 8, 9, 11, 12, 15, 16]
+idx: 3, delta: 3, matching: false, a (6): [6, 9, 10, 12], b (1): [0, 1, 2, 3, 4, 6, 9, 13, 15, 16]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2, 3, 4, 5, 6, 8, 15, 16], b (0): [0, 2, 3, 5, 6, 7, 8, 14, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 4, 6, 7, 9, 13, 14, 16], b (5): [1, 4, 6, 7, 9, 10, 12, 13, 14, 15, 16]
+idx: 4, delta: 2, matching: false, a (6): [6, 9, 10, 12], b (3): [0, 5, 6, 9, 10, 11, 14, 16]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 2, 3, 4, 5, 6, 8, 15, 16], b (2): [2, 3, 7, 8, 9, 11, 12, 15, 16]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 16], b (1): [0, 1, 2, 3, 4, 6, 9, 13, 15, 16]
+idx: 4, delta: 5, matching: false, a (9): [2, 3, 6, 8, 11, 12, 13, 15], b (0): [0, 2, 3, 5, 6, 7, 8, 14, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 4, 6, 7, 9, 10, 12, 13, 14, 15, 16], b (6): [6, 9, 10, 12]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2, 3, 4, 5, 6, 8, 15, 16], b (4): [1, 2, 3, 4, 6, 7, 9, 13, 14, 16]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 16], b (3): [0, 5, 6, 9, 10, 11, 14, 16]
+idx: 5, delta: 4, matching: false, a (9): [2, 3, 6, 8, 11, 12, 13, 15], b (2): [2, 3, 7, 8, 9, 11, 12, 15, 16]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 4, 5, 7, 8, 11, 12, 15, 16], b (1): [0, 1, 2, 3, 4, 6, 9, 13, 15, 16]
+idx: 5, delta: 6, matching: false, a (11): [0, 5, 10, 12, 13, 15, 16], b (0): [0, 2, 3, 5, 6, 7, 8, 14, 16]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [6, 9, 10, 12], b (7): [0, 1, 2, 3, 4, 5, 6, 8, 15, 16]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 16], b (5): [1, 4, 6, 7, 9, 10, 12, 13, 14, 15, 16]
+idx: 6, delta: 3, matching: false, a (9): [2, 3, 6, 8, 11, 12, 13, 15], b (4): [1, 2, 3, 4, 6, 7, 9, 13, 14, 16]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 4, 5, 7, 8, 11, 12, 15, 16], b (3): [0, 5, 6, 9, 10, 11, 14, 16]
+idx: 6, delta: 5, matching: false, a (11): [0, 5, 10, 12, 13, 15, 16], b (2): [2, 3, 7, 8, 9, 11, 12, 15, 16]
+idx: 6, delta: 6, matching: false, a (12): [1, 4, 6, 9, 10, 11, 12], b (1): [0, 1, 2, 3, 4, 6, 9, 13, 15, 16]
+idx: 6, delta: 7, matching: false, a (13): [1, 4, 6, 9, 10, 11, 12], b (0): [0, 2, 3, 5, 6, 7, 8, 14, 16]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 2, 3, 4, 5, 6, 8, 15, 16], b (8): [0, 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 16]
+idx: 7, delta: 2, matching: false, a (9): [2, 3, 6, 8, 11, 12, 13, 15], b (6): [6, 9, 10, 12]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 4, 5, 7, 8, 11, 12, 15, 16], b (5): [1, 4, 6, 7, 9, 10, 12, 13, 14, 15, 16]
+idx: 7, delta: 4, matching: false, a (11): [0, 5, 10, 12, 13, 15, 16], b (4): [1, 2, 3, 4, 6, 7, 9, 13, 14, 16]
+idx: 7, delta: 5, matching: false, a (12): [1, 4, 6, 9, 10, 11, 12], b (3): [0, 5, 6, 9, 10, 11, 14, 16]
+idx: 7, delta: 6, matching: false, a (13): [1, 4, 6, 9, 10, 11, 12], b (2): [2, 3, 7, 8, 9, 11, 12, 15, 16]
+idx: 7, delta: 7, matching: false, a (14): [0, 5, 10, 12, 13, 15, 16], b (1): [0, 1, 2, 3, 4, 6, 9, 13, 15, 16]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 16], b (9): [2, 3, 6, 8, 11, 12, 13, 15]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 4, 5, 7, 8, 11, 12, 15, 16], b (7): [0, 1, 2, 3, 4, 5, 6, 8, 15, 16]
+idx: 8, delta: 3, matching: false, a (11): [0, 5, 10, 12, 13, 15, 16], b (6): [6, 9, 10, 12]
+idx: 8, delta: 4, matching: false, a (12): [1, 4, 6, 9, 10, 11, 12], b (5): [1, 4, 6, 7, 9, 10, 12, 13, 14, 15, 16]
+idx: 8, delta: 5, matching: false, a (13): [1, 4, 6, 9, 10, 11, 12], b (4): [1, 2, 3, 4, 6, 7, 9, 13, 14, 16]
+idx: 8, delta: 6, matching: false, a (14): [0, 5, 10, 12, 13, 15, 16], b (3): [0, 5, 6, 9, 10, 11, 14, 16]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [2, 3, 6, 8, 11, 12, 13, 15], b (10): [0, 1, 4, 5, 7, 8, 11, 12, 15, 16]
+idx: 9, delta: 2, matching: false, a (11): [0, 5, 10, 12, 13, 15, 16], b (8): [0, 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 16]
+idx: 9, delta: 3, matching: false, a (12): [1, 4, 6, 9, 10, 11, 12], b (7): [0, 1, 2, 3, 4, 5, 6, 8, 15, 16]
+idx: 9, delta: 4, matching: false, a (13): [1, 4, 6, 9, 10, 11, 12], b (6): [6, 9, 10, 12]
+idx: 9, delta: 5, matching: false, a (14): [0, 5, 10, 12, 13, 15, 16], b (5): [1, 4, 6, 7, 9, 10, 12, 13, 14, 15, 16]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 4, 5, 7, 8, 11, 12, 15, 16], b (11): [0, 5, 10, 12, 13, 15, 16]
+idx: 10, delta: 2, matching: false, a (12): [1, 4, 6, 9, 10, 11, 12], b (9): [2, 3, 6, 8, 11, 12, 13, 15]
+idx: 10, delta: 3, matching: false, a (13): [1, 4, 6, 9, 10, 11, 12], b (8): [0, 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 16]
+idx: 10, delta: 4, matching: false, a (14): [0, 5, 10, 12, 13, 15, 16], b (7): [0, 1, 2, 3, 4, 5, 6, 8, 15, 16]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 5, 10, 12, 13, 15, 16], b (12): [1, 4, 6, 9, 10, 11, 12]
+idx: 11, delta: 2, matching: false, a (13): [1, 4, 6, 9, 10, 11, 12], b (10): [0, 1, 4, 5, 7, 8, 11, 12, 15, 16]
+idx: 11, delta: 3, matching: false, a (14): [0, 5, 10, 12, 13, 15, 16], b (9): [2, 3, 6, 8, 11, 12, 13, 15]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: true, a (12): [1, 4, 6, 9, 10, 11, 12], b (13): [1, 4, 6, 9, 10, 11, 12]
+idx: 12, delta: 2, matching: true, a (14): [0, 5, 10, 12, 13, 15, 16], b (11): [0, 5, 10, 12, 13, 15, 16]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [1, 4, 6, 9, 10, 11, 12], b (14): [0, 5, 10, 12, 13, 15, 16]
+idx: 13 --- EXITING WITH false
+idx: 14 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 7, 8, 10, 11, 14], b (1): [1, 4, 5, 7, 8, 10, 12, 13]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 4, 5, 7, 8, 10, 12, 13], b (2): [0, 1, 2, 4, 7, 8, 9]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 4, 7, 8, 9], b (0): [0, 1, 3, 7, 8, 10, 11, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: true, a (2): [0, 1, 2, 4, 7, 8, 9], b (3): [0, 1, 2, 4, 7, 8, 9]
+idx: 2, delta: 2, matching: true, a (4): [1, 4, 5, 7, 8, 10, 12, 13], b (1): [1, 4, 5, 7, 8, 10, 12, 13]
+idx: 2, delta: 3, matching: false, a (5): [0, 3, 7, 8, 10, 11, 14], b (0): [0, 1, 3, 7, 8, 10, 11, 14]
+idx: 2, delta: 3 --- found smudge!
+idx: 2 --- EXITING WITH true
+##.#...##.##..#
+.#..##.##.#.##.
+###.#..###.....
+###.#..###.....
+.#..##.##.#.##.
+#..#...##.##..#
+##.#####.#..##.
+#.#.##..#.#....
+#.#....####....
+.######.#...##.
+...#.##.#..####
+..##....###.##.
+..#..##.#######
+.#..##...#.#..#
+#..###.........
+.##..#.#.###..#
+######.##.##..#
+300 (vert: 0, horiz: 3)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 4, 5, 9, 10, 11, 12], b (1): [0, 1, 4, 5, 6, 7]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 4, 5, 6, 7], b (2): [3, 5]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 5, 10, 11, 12], b (0): [0, 1, 2, 4, 5, 9, 10, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 5], b (3): [0, 1, 2, 5, 10, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 4, 5, 6], b (1): [0, 1, 4, 5, 6, 7]
+idx: 2, delta: 3, matching: false, a (5): [0, 4, 5, 6, 8, 9, 12], b (0): [0, 1, 2, 4, 5, 9, 10, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 5, 10, 11, 12], b (4): [0, 1, 3, 4, 5, 6]
+idx: 3, delta: 2, matching: false, a (5): [0, 4, 5, 6, 8, 9, 12], b (2): [3, 5]
+idx: 3, delta: 3, matching: false, a (6): [7, 8], b (1): [0, 1, 4, 5, 6, 7]
+idx: 3, delta: 4, matching: false, a (7): [4, 7, 10, 11, 12], b (0): [0, 1, 2, 4, 5, 9, 10, 11, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3, 4, 5, 6], b (5): [0, 4, 5, 6, 8, 9, 12]
+idx: 4, delta: 2, matching: false, a (6): [7, 8], b (3): [0, 1, 2, 5, 10, 11, 12]
+idx: 4, delta: 3, matching: false, a (7): [4, 7, 10, 11, 12], b (2): [3, 5]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 3, 4, 5, 7, 11, 12], b (1): [0, 1, 4, 5, 6, 7]
+idx: 4, delta: 5, matching: false, a (9): [0, 2, 5], b (0): [0, 1, 2, 4, 5, 9, 10, 11, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 4, 5, 6, 8, 9, 12], b (6): [7, 8]
+idx: 5, delta: 2, matching: false, a (7): [4, 7, 10, 11, 12], b (4): [0, 1, 3, 4, 5, 6]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 3, 4, 5, 7, 11, 12], b (3): [0, 1, 2, 5, 10, 11, 12]
+idx: 5, delta: 4, matching: false, a (9): [0, 2, 5], b (2): [3, 5]
+idx: 5, delta: 5, matching: false, a (10): [2, 3, 4, 5, 6, 9, 11, 12], b (1): [0, 1, 4, 5, 6, 7]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 3, 4, 5, 7, 11, 12], b (0): [0, 1, 2, 4, 5, 9, 10, 11, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [7, 8], b (7): [4, 7, 10, 11, 12]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 3, 4, 5, 7, 11, 12], b (5): [0, 4, 5, 6, 8, 9, 12]
+idx: 6, delta: 3, matching: false, a (9): [0, 2, 5], b (4): [0, 1, 3, 4, 5, 6]
+idx: 6, delta: 4, matching: false, a (10): [2, 3, 4, 5, 6, 9, 11, 12], b (3): [0, 1, 2, 5, 10, 11, 12]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 3, 4, 5, 7, 11, 12], b (2): [3, 5]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12], b (1): [0, 1, 4, 5, 6, 7]
+idx: 6, delta: 7, matching: false, a (13): [0, 2, 5, 6, 9], b (0): [0, 1, 2, 4, 5, 9, 10, 11, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [4, 7, 10, 11, 12], b (8): [0, 1, 3, 4, 5, 7, 11, 12]
+idx: 7, delta: 2, matching: false, a (9): [0, 2, 5], b (6): [7, 8]
+idx: 7, delta: 3, matching: false, a (10): [2, 3, 4, 5, 6, 9, 11, 12], b (5): [0, 4, 5, 6, 8, 9, 12]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 3, 4, 5, 7, 11, 12], b (4): [0, 1, 3, 4, 5, 6]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12], b (3): [0, 1, 2, 5, 10, 11, 12]
+idx: 7, delta: 6, matching: false, a (13): [0, 2, 5, 6, 9], b (2): [3, 5]
+idx: 7, delta: 7, matching: false, a (14): [0, 2, 5, 6, 9], b (1): [0, 1, 4, 5, 6, 7]
+idx: 7, delta: 8, matching: false, a (15): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12], b (0): [0, 1, 2, 4, 5, 9, 10, 11, 12]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 3, 4, 5, 7, 11, 12], b (9): [0, 2, 5]
+idx: 8, delta: 2, matching: false, a (10): [2, 3, 4, 5, 6, 9, 11, 12], b (7): [4, 7, 10, 11, 12]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 3, 4, 5, 7, 11, 12], b (6): [7, 8]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12], b (5): [0, 4, 5, 6, 8, 9, 12]
+idx: 8, delta: 5, matching: false, a (13): [0, 2, 5, 6, 9], b (4): [0, 1, 3, 4, 5, 6]
+idx: 8, delta: 6, matching: false, a (14): [0, 2, 5, 6, 9], b (3): [0, 1, 2, 5, 10, 11, 12]
+idx: 8, delta: 7, matching: false, a (15): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12], b (2): [3, 5]
+idx: 8, delta: 8, matching: false, a (16): [0, 1, 3, 4, 5, 7, 11, 12], b (1): [0, 1, 4, 5, 6, 7]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 2, 5], b (10): [2, 3, 4, 5, 6, 9, 11, 12]
+idx: 9, delta: 2, matching: true, a (11): [0, 1, 3, 4, 5, 7, 11, 12], b (8): [0, 1, 3, 4, 5, 7, 11, 12]
+idx: 9, delta: 3, matching: false, a (12): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12], b (7): [4, 7, 10, 11, 12]
+idx: 9, delta: 4, matching: false, a (13): [0, 2, 5, 6, 9], b (6): [7, 8]
+idx: 9, delta: 5, matching: false, a (14): [0, 2, 5, 6, 9], b (5): [0, 4, 5, 6, 8, 9, 12]
+idx: 9, delta: 6, matching: false, a (15): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12], b (4): [0, 1, 3, 4, 5, 6]
+idx: 9, delta: 7, matching: false, a (16): [0, 1, 3, 4, 5, 7, 11, 12], b (3): [0, 1, 2, 5, 10, 11, 12]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [2, 3, 4, 5, 6, 9, 11, 12], b (11): [0, 1, 3, 4, 5, 7, 11, 12]
+idx: 10, delta: 2, matching: false, a (12): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12], b (9): [0, 2, 5]
+idx: 10, delta: 3, matching: false, a (13): [0, 2, 5, 6, 9], b (8): [0, 1, 3, 4, 5, 7, 11, 12]
+idx: 10, delta: 4, matching: false, a (14): [0, 2, 5, 6, 9], b (7): [4, 7, 10, 11, 12]
+idx: 10, delta: 5, matching: false, a (15): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12], b (6): [7, 8]
+idx: 10, delta: 6, matching: false, a (16): [0, 1, 3, 4, 5, 7, 11, 12], b (5): [0, 4, 5, 6, 8, 9, 12]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 3, 4, 5, 7, 11, 12], b (12): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12]
+idx: 11, delta: 2, matching: false, a (13): [0, 2, 5, 6, 9], b (10): [2, 3, 4, 5, 6, 9, 11, 12]
+idx: 11, delta: 3, matching: false, a (14): [0, 2, 5, 6, 9], b (9): [0, 2, 5]
+idx: 11, delta: 4, matching: false, a (15): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12], b (8): [0, 1, 3, 4, 5, 7, 11, 12]
+idx: 11, delta: 5, matching: false, a (16): [0, 1, 3, 4, 5, 7, 11, 12], b (7): [4, 7, 10, 11, 12]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12], b (13): [0, 2, 5, 6, 9]
+idx: 12, delta: 2, matching: false, a (14): [0, 2, 5, 6, 9], b (11): [0, 1, 3, 4, 5, 7, 11, 12]
+idx: 12, delta: 3, matching: false, a (15): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12], b (10): [2, 3, 4, 5, 6, 9, 11, 12]
+idx: 12, delta: 4, matching: false, a (16): [0, 1, 3, 4, 5, 7, 11, 12], b (9): [0, 2, 5]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: true, a (13): [0, 2, 5, 6, 9], b (14): [0, 2, 5, 6, 9]
+idx: 13, delta: 2, matching: true, a (15): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12], b (12): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12]
+idx: 13, delta: 3, matching: true, a (16): [0, 1, 3, 4, 5, 7, 11, 12], b (11): [0, 1, 3, 4, 5, 7, 11, 12]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [0, 2, 5, 6, 9], b (15): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12]
+idx: 14, delta: 2, matching: false, a (16): [0, 1, 3, 4, 5, 7, 11, 12], b (13): [0, 2, 5, 6, 9]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: false, a (15): [0, 1, 2, 4, 5, 6, 7, 8, 11, 12], b (16): [0, 1, 3, 4, 5, 7, 11, 12]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 4, 5, 8, 9, 11, 12, 13, 14, 15, 16], b (1): [0, 1, 3, 4, 8, 11, 12, 15, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 3, 4, 8, 11, 12, 15, 16], b (2): [0, 3, 9, 10, 12, 13, 14, 15]
+idx: 1, delta: 2, matching: false, a (3): [2, 4, 8, 10, 11, 16], b (0): [0, 1, 3, 4, 5, 8, 9, 11, 12, 13, 14, 15, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 9, 10, 12, 13, 14, 15], b (3): [2, 4, 8, 10, 11, 16]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 4, 5, 7, 8, 10, 11, 12, 15, 16], b (1): [0, 1, 3, 4, 8, 11, 12, 15, 16]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16], b (0): [0, 1, 3, 4, 5, 8, 9, 11, 12, 13, 14, 15, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 4, 8, 10, 11, 16], b (4): [0, 1, 4, 5, 7, 8, 10, 11, 12, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16], b (2): [0, 3, 9, 10, 12, 13, 14, 15]
+idx: 3, delta: 3, matching: false, a (6): [1, 4, 5, 10, 12, 13, 14, 15], b (1): [0, 1, 3, 4, 8, 11, 12, 15, 16]
+idx: 3, delta: 4, matching: false, a (7): [1, 6, 7, 8, 11, 12, 15, 16], b (0): [0, 1, 3, 4, 5, 8, 9, 11, 12, 13, 14, 15, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 4, 5, 7, 8, 10, 11, 12, 15, 16], b (5): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16]
+idx: 4, delta: 2, matching: false, a (6): [1, 4, 5, 10, 12, 13, 14, 15], b (3): [2, 4, 8, 10, 11, 16]
+idx: 4, delta: 3, matching: false, a (7): [1, 6, 7, 8, 11, 12, 15, 16], b (2): [0, 3, 9, 10, 12, 13, 14, 15]
+idx: 4, delta: 4, matching: false, a (8): [5, 6, 12, 15], b (1): [0, 1, 3, 4, 8, 11, 12, 15, 16]
+idx: 4, delta: 5, matching: false, a (9): [0, 5, 10, 13, 14], b (0): [0, 1, 3, 4, 5, 8, 9, 11, 12, 13, 14, 15, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16], b (6): [1, 4, 5, 10, 12, 13, 14, 15]
+idx: 5, delta: 2, matching: false, a (7): [1, 6, 7, 8, 11, 12, 15, 16], b (4): [0, 1, 4, 5, 7, 8, 10, 11, 12, 15, 16]
+idx: 5, delta: 3, matching: false, a (8): [5, 6, 12, 15], b (3): [2, 4, 8, 10, 11, 16]
+idx: 5, delta: 4, matching: false, a (9): [0, 5, 10, 13, 14], b (2): [0, 3, 9, 10, 12, 13, 14, 15]
+idx: 5, delta: 5, matching: false, a (10): [0, 3, 7], b (1): [0, 1, 3, 4, 8, 11, 12, 15, 16]
+idx: 5, delta: 6, matching: false, a (11): [0, 3, 7, 8, 10, 11, 12, 15, 16], b (0): [0, 1, 3, 4, 5, 8, 9, 11, 12, 13, 14, 15, 16]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 4, 5, 10, 12, 13, 14, 15], b (7): [1, 6, 7, 8, 11, 12, 15, 16]
+idx: 6, delta: 2, matching: false, a (8): [5, 6, 12, 15], b (5): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16]
+idx: 6, delta: 3, matching: false, a (9): [0, 5, 10, 13, 14], b (4): [0, 1, 4, 5, 7, 8, 10, 11, 12, 15, 16]
+idx: 6, delta: 4, matching: false, a (10): [0, 3, 7], b (3): [2, 4, 8, 10, 11, 16]
+idx: 6, delta: 5, matching: false, a (11): [0, 3, 7, 8, 10, 11, 12, 15, 16], b (2): [0, 3, 9, 10, 12, 13, 14, 15]
+idx: 6, delta: 6, matching: false, a (12): [0, 3, 5, 7, 8, 10, 11, 12, 15, 16], b (1): [0, 1, 3, 4, 8, 11, 12, 15, 16]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 6, 7, 8, 11, 12, 15, 16], b (8): [5, 6, 12, 15]
+idx: 7, delta: 2, matching: false, a (9): [0, 5, 10, 13, 14], b (6): [1, 4, 5, 10, 12, 13, 14, 15]
+idx: 7, delta: 3, matching: false, a (10): [0, 3, 7], b (5): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16]
+idx: 7, delta: 4, matching: false, a (11): [0, 3, 7, 8, 10, 11, 12, 15, 16], b (4): [0, 1, 4, 5, 7, 8, 10, 11, 12, 15, 16]
+idx: 7, delta: 5, matching: false, a (12): [0, 3, 5, 7, 8, 10, 11, 12, 15, 16], b (3): [2, 4, 8, 10, 11, 16]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [5, 6, 12, 15], b (9): [0, 5, 10, 13, 14]
+idx: 8, delta: 2, matching: false, a (10): [0, 3, 7], b (7): [1, 6, 7, 8, 11, 12, 15, 16]
+idx: 8, delta: 3, matching: false, a (11): [0, 3, 7, 8, 10, 11, 12, 15, 16], b (6): [1, 4, 5, 10, 12, 13, 14, 15]
+idx: 8, delta: 4, matching: false, a (12): [0, 3, 5, 7, 8, 10, 11, 12, 15, 16], b (5): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 5, 10, 13, 14], b (10): [0, 3, 7]
+idx: 9, delta: 2, matching: false, a (11): [0, 3, 7, 8, 10, 11, 12, 15, 16], b (8): [5, 6, 12, 15]
+idx: 9, delta: 3, matching: false, a (12): [0, 3, 5, 7, 8, 10, 11, 12, 15, 16], b (7): [1, 6, 7, 8, 11, 12, 15, 16]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 3, 7], b (11): [0, 3, 7, 8, 10, 11, 12, 15, 16]
+idx: 10, delta: 2, matching: false, a (12): [0, 3, 5, 7, 8, 10, 11, 12, 15, 16], b (9): [0, 5, 10, 13, 14]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 3, 7, 8, 10, 11, 12, 15, 16], b (12): [0, 3, 5, 7, 8, 10, 11, 12, 15, 16]
+idx: 11, delta: 0 --- found smudge!
+idx: 11 --- EXITING WITH true
+##.###..##.######
+##.##...#..##..##
+#..#.....##.####.
+..#.#...#.##....#
+##..##.##.###..##
+######..#########
+.#..##....#.####.
+.#....###..##..##
+.....##.....#..#.
+#....#....#..##..
+#..#...#.........
+#..#...##.###..##
+#..#.#.##.###..##
+1200 (vert: 0, horiz: 12)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 4, 7, 8, 9, 10, 11, 14, 15, 16], b (1): [1, 2, 5, 7, 11, 12, 14, 15]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 5, 7, 11, 12, 14, 15], b (2): [0, 3, 4, 9, 12, 13, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [0, 3, 5, 6, 7, 8, 9, 12, 13, 16], b (0): [1, 2, 4, 7, 8, 9, 10, 11, 14, 15, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 4, 9, 12, 13, 15, 16], b (3): [0, 3, 5, 6, 7, 8, 9, 12, 13, 16]
+idx: 2, delta: 2, matching: false, a (4): [0, 3, 5, 6, 7, 8, 9, 12, 13, 16], b (1): [1, 2, 5, 7, 11, 12, 14, 15]
+idx: 2, delta: 3, matching: false, a (5): [0, 3, 4, 9, 12, 13, 15, 16], b (0): [1, 2, 4, 7, 8, 9, 10, 11, 14, 15, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [0, 3, 5, 6, 7, 8, 9, 12, 13, 16], b (4): [0, 3, 5, 6, 7, 8, 9, 12, 13, 16]
+idx: 3, delta: 2, matching: true, a (5): [0, 3, 4, 9, 12, 13, 15, 16], b (2): [0, 3, 4, 9, 12, 13, 15, 16]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 5, 7, 11, 12, 13, 14, 15], b (1): [1, 2, 5, 7, 11, 12, 14, 15]
+idx: 3, delta: 3 --- found smudge!
+idx: 3 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [2, 3, 4, 5], b (1): [0, 1, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: true, a (1): [0, 1, 6], b (2): [0, 1, 6]
+idx: 1, delta: 2, matching: true, a (3): [2, 3, 4, 5], b (0): [2, 3, 4, 5]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 6], b (3): [2, 3, 4, 5]
+idx: 2, delta: 2, matching: false, a (4): [0, 2, 5], b (1): [0, 1, 6]
+idx: 2, delta: 3, matching: false, a (5): [1, 3, 4, 6], b (0): [2, 3, 4, 5]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 3, 4, 5], b (4): [0, 2, 5]
+idx: 3, delta: 2, matching: false, a (5): [1, 3, 4, 6], b (2): [0, 1, 6]
+idx: 3, delta: 3, matching: false, a (6): [3, 4], b (1): [0, 1, 6]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 3, 4, 6], b (0): [2, 3, 4, 5]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 2, 5], b (5): [1, 3, 4, 6]
+idx: 4, delta: 2, matching: false, a (6): [3, 4], b (3): [2, 3, 4, 5]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 3, 4, 6], b (2): [0, 1, 6]
+idx: 4, delta: 4, matching: false, a (8): [0, 3, 4], b (1): [0, 1, 6]
+idx: 4, delta: 5, matching: false, a (9): [0, 2, 3, 4, 5], b (0): [2, 3, 4, 5]
+idx: 4, delta: 5 --- found smudge!
+idx: 4 --- EXITING WITH true
+..####.
+##....#
+##....#
+..####.
+#.#..#.
+.#.##.#
+...##..
+##.##.#
+#..##..
+#.####.
+#......
+##....#
+.######
+..#####
+##....#
+###..##
+#.####.
+504 (vert: 4, horiz: 5)
+
+idx: 0, delta: 0, matching: false, a (0): [2, 3, 4, 6, 7, 8, 9, 12], b (1): [1, 2, 4, 6, 7, 8, 13, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 4, 6, 7, 8, 13, 14], b (2): [5, 6, 9, 10, 12]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 4, 6, 8, 13, 14], b (0): [2, 3, 4, 6, 7, 8, 9, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [5, 6, 9, 10, 12], b (3): [0, 2, 4, 6, 8, 13, 14]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 5, 8, 9, 10, 12], b (1): [1, 2, 4, 6, 7, 8, 13, 14]
+idx: 2, delta: 3, matching: false, a (5): [2, 3, 5, 6, 8, 9, 11, 12, 13, 14], b (0): [2, 3, 4, 6, 7, 8, 9, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 4, 6, 8, 13, 14], b (4): [1, 2, 3, 5, 8, 9, 10, 12]
+idx: 3, delta: 2, matching: false, a (5): [2, 3, 5, 6, 8, 9, 11, 12, 13, 14], b (2): [5, 6, 9, 10, 12]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 3, 4, 5, 6, 7, 8, 11], b (1): [1, 2, 4, 6, 7, 8, 13, 14]
+idx: 3, delta: 4, matching: false, a (7): [0, 2, 3, 4, 5, 7, 8, 11], b (0): [2, 3, 4, 6, 7, 8, 9, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 5, 8, 9, 10, 12], b (5): [2, 3, 5, 6, 8, 9, 11, 12, 13, 14]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 3, 4, 5, 6, 7, 8, 11], b (3): [0, 2, 4, 6, 8, 13, 14]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 3, 4, 5, 7, 8, 11], b (2): [5, 6, 9, 10, 12]
+idx: 4, delta: 4, matching: false, a (8): [2, 3, 5, 6, 8, 9, 11, 12, 13, 14], b (1): [1, 2, 4, 6, 7, 8, 13, 14]
+idx: 4, delta: 5, matching: false, a (9): [1, 2, 3, 5, 8, 9, 10, 12], b (0): [2, 3, 4, 6, 7, 8, 9, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 3, 5, 6, 8, 9, 11, 12, 13, 14], b (6): [0, 2, 3, 4, 5, 6, 7, 8, 11]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 3, 4, 5, 7, 8, 11], b (4): [1, 2, 3, 5, 8, 9, 10, 12]
+idx: 5, delta: 3, matching: false, a (8): [2, 3, 5, 6, 8, 9, 11, 12, 13, 14], b (3): [0, 2, 4, 6, 8, 13, 14]
+idx: 5, delta: 4, matching: false, a (9): [1, 2, 3, 5, 8, 9, 10, 12], b (2): [5, 6, 9, 10, 12]
+idx: 5, delta: 5, matching: false, a (10): [0, 2, 4, 6, 8, 13, 14], b (1): [1, 2, 4, 6, 7, 8, 13, 14]
+idx: 5, delta: 6, matching: false, a (11): [5, 6, 9, 10, 12], b (0): [2, 3, 4, 6, 7, 8, 9, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 2, 3, 4, 5, 6, 7, 8, 11], b (7): [0, 2, 3, 4, 5, 7, 8, 11]
+idx: 6, delta: 0 --- found smudge!
+idx: 6, delta: 2, matching: true, a (8): [2, 3, 5, 6, 8, 9, 11, 12, 13, 14], b (5): [2, 3, 5, 6, 8, 9, 11, 12, 13, 14]
+idx: 6, delta: 3, matching: true, a (9): [1, 2, 3, 5, 8, 9, 10, 12], b (4): [1, 2, 3, 5, 8, 9, 10, 12]
+idx: 6, delta: 4, matching: true, a (10): [0, 2, 4, 6, 8, 13, 14], b (3): [0, 2, 4, 6, 8, 13, 14]
+idx: 6, delta: 5, matching: true, a (11): [5, 6, 9, 10, 12], b (2): [5, 6, 9, 10, 12]
+idx: 6, delta: 6, matching: true, a (12): [1, 2, 4, 6, 7, 8, 13, 14], b (1): [1, 2, 4, 6, 7, 8, 13, 14]
+idx: 6, delta: 7, matching: true, a (13): [2, 3, 4, 6, 7, 8, 9, 12], b (0): [2, 3, 4, 6, 7, 8, 9, 12]
+idx: 6 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [3, 6, 7, 10, 14, 15, 16], b (1): [1, 4, 9, 12, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 4, 9, 12, 16], b (2): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [0, 4, 5, 6, 7, 8, 9, 13], b (0): [3, 6, 7, 10, 14, 15, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15, 16], b (3): [0, 4, 5, 6, 7, 8, 9, 13]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 6, 7, 10, 12, 13], b (1): [1, 4, 9, 12, 16]
+idx: 2, delta: 3, matching: false, a (5): [2, 4, 5, 6, 7, 8, 9, 11, 15, 16], b (0): [3, 6, 7, 10, 14, 15, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 4, 5, 6, 7, 8, 9, 13], b (4): [0, 1, 3, 6, 7, 10, 12, 13]
+idx: 3, delta: 2, matching: false, a (5): [2, 4, 5, 6, 7, 8, 9, 11, 15, 16], b (2): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15, 16]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 3, 5, 6, 8, 10, 11, 12, 13, 14, 15], b (1): [1, 4, 9, 12, 16]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 6, 7, 12, 13, 14], b (0): [3, 6, 7, 10, 14, 15, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3, 6, 7, 10, 12, 13], b (5): [2, 4, 5, 6, 7, 8, 9, 11, 15, 16]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 3, 5, 6, 8, 10, 11, 12, 13, 14, 15], b (3): [0, 4, 5, 6, 7, 8, 9, 13]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 6, 7, 12, 13, 14], b (2): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15, 16]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15], b (1): [1, 4, 9, 12, 16]
+idx: 4, delta: 5, matching: false, a (9): [0, 2, 4, 5, 8, 9, 11, 13, 15, 16], b (0): [3, 6, 7, 10, 14, 15, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 4, 5, 6, 7, 8, 9, 11, 15, 16], b (6): [0, 1, 2, 3, 5, 6, 8, 10, 11, 12, 13, 14, 15]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 6, 7, 12, 13, 14], b (4): [0, 1, 3, 6, 7, 10, 12, 13]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15], b (3): [0, 4, 5, 6, 7, 8, 9, 13]
+idx: 5, delta: 4, matching: false, a (9): [0, 2, 4, 5, 8, 9, 11, 13, 15, 16], b (2): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15, 16]
+idx: 5, delta: 5, matching: false, a (10): [2, 4, 9, 11], b (1): [1, 4, 9, 12, 16]
+idx: 5, delta: 6, matching: false, a (11): [5, 6, 7, 8, 14, 15], b (0): [3, 6, 7, 10, 14, 15, 16]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 3, 5, 6, 8, 10, 11, 12, 13, 14, 15], b (7): [0, 1, 6, 7, 12, 13, 14]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15], b (5): [2, 4, 5, 6, 7, 8, 9, 11, 15, 16]
+idx: 6, delta: 3, matching: false, a (9): [0, 2, 4, 5, 8, 9, 11, 13, 15, 16], b (4): [0, 1, 3, 6, 7, 10, 12, 13]
+idx: 6, delta: 4, matching: false, a (10): [2, 4, 9, 11], b (3): [0, 4, 5, 6, 7, 8, 9, 13]
+idx: 6, delta: 5, matching: false, a (11): [5, 6, 7, 8, 14, 15], b (2): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15, 16]
+idx: 6, delta: 6, matching: false, a (12): [0, 2, 4, 5, 8, 9, 11, 13, 14, 15], b (1): [1, 4, 9, 12, 16]
+idx: 6, delta: 7, matching: false, a (13): [1, 3, 5, 8, 10, 12, 14, 15], b (0): [3, 6, 7, 10, 14, 15, 16]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 6, 7, 12, 13, 14], b (8): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15]
+idx: 7, delta: 2, matching: false, a (9): [0, 2, 4, 5, 8, 9, 11, 13, 15, 16], b (6): [0, 1, 2, 3, 5, 6, 8, 10, 11, 12, 13, 14, 15]
+idx: 7, delta: 3, matching: false, a (10): [2, 4, 9, 11], b (5): [2, 4, 5, 6, 7, 8, 9, 11, 15, 16]
+idx: 7, delta: 4, matching: false, a (11): [5, 6, 7, 8, 14, 15], b (4): [0, 1, 3, 6, 7, 10, 12, 13]
+idx: 7, delta: 5, matching: false, a (12): [0, 2, 4, 5, 8, 9, 11, 13, 14, 15], b (3): [0, 4, 5, 6, 7, 8, 9, 13]
+idx: 7, delta: 6, matching: false, a (13): [1, 3, 5, 8, 10, 12, 14, 15], b (2): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15, 16]
+idx: 7, delta: 7, matching: false, a (14): [1, 3, 5, 8, 10, 12, 14, 15], b (1): [1, 4, 9, 12, 16]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15], b (9): [0, 2, 4, 5, 8, 9, 11, 13, 15, 16]
+idx: 8, delta: 2, matching: false, a (10): [2, 4, 9, 11], b (7): [0, 1, 6, 7, 12, 13, 14]
+idx: 8, delta: 3, matching: false, a (11): [5, 6, 7, 8, 14, 15], b (6): [0, 1, 2, 3, 5, 6, 8, 10, 11, 12, 13, 14, 15]
+idx: 8, delta: 4, matching: false, a (12): [0, 2, 4, 5, 8, 9, 11, 13, 14, 15], b (5): [2, 4, 5, 6, 7, 8, 9, 11, 15, 16]
+idx: 8, delta: 5, matching: false, a (13): [1, 3, 5, 8, 10, 12, 14, 15], b (4): [0, 1, 3, 6, 7, 10, 12, 13]
+idx: 8, delta: 6, matching: false, a (14): [1, 3, 5, 8, 10, 12, 14, 15], b (3): [0, 4, 5, 6, 7, 8, 9, 13]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 2, 4, 5, 8, 9, 11, 13, 15, 16], b (10): [2, 4, 9, 11]
+idx: 9, delta: 2, matching: false, a (11): [5, 6, 7, 8, 14, 15], b (8): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15]
+idx: 9, delta: 3, matching: false, a (12): [0, 2, 4, 5, 8, 9, 11, 13, 14, 15], b (7): [0, 1, 6, 7, 12, 13, 14]
+idx: 9, delta: 4, matching: false, a (13): [1, 3, 5, 8, 10, 12, 14, 15], b (6): [0, 1, 2, 3, 5, 6, 8, 10, 11, 12, 13, 14, 15]
+idx: 9, delta: 5, matching: false, a (14): [1, 3, 5, 8, 10, 12, 14, 15], b (5): [2, 4, 5, 6, 7, 8, 9, 11, 15, 16]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [2, 4, 9, 11], b (11): [5, 6, 7, 8, 14, 15]
+idx: 10, delta: 2, matching: false, a (12): [0, 2, 4, 5, 8, 9, 11, 13, 14, 15], b (9): [0, 2, 4, 5, 8, 9, 11, 13, 15, 16]
+idx: 10, delta: 3, matching: false, a (13): [1, 3, 5, 8, 10, 12, 14, 15], b (8): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15]
+idx: 10, delta: 4, matching: false, a (14): [1, 3, 5, 8, 10, 12, 14, 15], b (7): [0, 1, 6, 7, 12, 13, 14]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [5, 6, 7, 8, 14, 15], b (12): [0, 2, 4, 5, 8, 9, 11, 13, 14, 15]
+idx: 11, delta: 2, matching: false, a (13): [1, 3, 5, 8, 10, 12, 14, 15], b (10): [2, 4, 9, 11]
+idx: 11, delta: 3, matching: false, a (14): [1, 3, 5, 8, 10, 12, 14, 15], b (9): [0, 2, 4, 5, 8, 9, 11, 13, 15, 16]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 2, 4, 5, 8, 9, 11, 13, 14, 15], b (13): [1, 3, 5, 8, 10, 12, 14, 15]
+idx: 12, delta: 2, matching: false, a (14): [1, 3, 5, 8, 10, 12, 14, 15], b (11): [5, 6, 7, 8, 14, 15]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: true, a (13): [1, 3, 5, 8, 10, 12, 14, 15], b (14): [1, 3, 5, 8, 10, 12, 14, 15]
+idx: 13 --- EXITING WITH false
+idx: 14 --- EXITING WITH false
+...#..##..#...###
+.#..#....#..#...#
+##.########.##.##
+#...######...#...
+##.#..##..#.##...
+..#.######.#...##
+####.##.#.######.
+##....##....###..
+##.########.##.#.
+#.#.##..##.#.#.##
+..#.#....#.#.....
+.....####.....##.
+#.#.##..##.#.###.
+.#.#.#..#.#.#.##.
+.#.#.#..#.#.#.##.
+7 (vert: 7, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 5], b (1): [0, 2, 3, 5, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 3, 5, 6], b (2): [1, 4, 6]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 6], b (0): [0, 1, 5]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 4, 6], b (3): [2, 3, 6]
+idx: 2, delta: 2, matching: false, a (4): [2, 3, 6], b (1): [0, 2, 3, 5, 6]
+idx: 2, delta: 3, matching: false, a (5): [1, 4, 6], b (0): [0, 1, 5]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [2, 3, 6], b (4): [2, 3, 6]
+idx: 3, delta: 2, matching: true, a (5): [1, 4, 6], b (2): [1, 4, 6]
+idx: 3, delta: 3, matching: true, a (6): [0, 2, 3, 5, 6], b (1): [0, 2, 3, 5, 6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 3, 6], b (5): [1, 4, 6]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 3, 5, 6], b (3): [2, 3, 6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 4, 6], b (6): [0, 2, 3, 5, 6]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 6], b (1): [0, 2, 5]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 5], b (2): [1, 3, 4, 6]
+idx: 1, delta: 2, matching: false, a (3): [1, 3, 4, 6], b (0): [0, 1, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: true, a (2): [1, 3, 4, 6], b (3): [1, 3, 4, 6]
+idx: 2, delta: 2, matching: false, a (4): [2, 5], b (1): [0, 2, 5]
+idx: 2, delta: 2 --- found smudge!
+idx: 2, delta: 3, matching: true, a (5): [0, 1, 6], b (0): [0, 1, 6]
+idx: 2 --- EXITING WITH true
+##....#
+#.#..#.
+.#.##.#
+.#.##.#
+..#..#.
+##....#
+.######
+300 (vert: 0, horiz: 3)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14], b (1): [2, 6, 7, 8, 9, 13]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 6, 7, 8, 9, 13], b (2): [0, 2, 5, 6, 7, 8, 9, 10, 13]
+idx: 1, delta: 2, matching: false, a (3): [0, 6, 7, 8, 9], b (0): [0, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 5, 6, 7, 8, 9, 10, 13], b (3): [0, 6, 7, 8, 9]
+idx: 2, delta: 2, matching: false, a (4): [0, 4, 11], b (1): [2, 6, 7, 8, 9, 13]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 5, 6, 7, 8, 9, 10, 13, 14], b (0): [0, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 6, 7, 8, 9], b (4): [0, 4, 11]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 5, 6, 7, 8, 9, 10, 13, 14], b (2): [0, 2, 5, 6, 7, 8, 9, 10, 13]
+idx: 3, delta: 3, matching: false, a (6): [3, 5, 10, 12], b (1): [2, 6, 7, 8, 9, 13]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2, 4, 7, 8, 11, 13, 14], b (0): [0, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 4, 11], b (5): [1, 2, 5, 6, 7, 8, 9, 10, 13, 14]
+idx: 4, delta: 2, matching: false, a (6): [3, 5, 10, 12], b (3): [0, 6, 7, 8, 9]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 2, 4, 7, 8, 11, 13, 14], b (2): [0, 2, 5, 6, 7, 8, 9, 10, 13]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 3, 6, 9, 12, 13], b (1): [2, 6, 7, 8, 9, 13]
+idx: 4, delta: 5, matching: false, a (9): [2, 4, 11, 13], b (0): [0, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 5, 6, 7, 8, 9, 10, 13, 14], b (6): [3, 5, 10, 12]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2, 4, 7, 8, 11, 13, 14], b (4): [0, 4, 11]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 3, 6, 9, 12, 13], b (3): [0, 6, 7, 8, 9]
+idx: 5, delta: 4, matching: false, a (9): [2, 4, 11, 13], b (2): [0, 2, 5, 6, 7, 8, 9, 10, 13]
+idx: 5, delta: 5, matching: false, a (10): [0, 2, 3, 12, 13], b (1): [2, 6, 7, 8, 9, 13]
+idx: 5, delta: 6, matching: false, a (11): [0, 3, 5, 10, 12], b (0): [0, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [3, 5, 10, 12], b (7): [0, 1, 2, 4, 7, 8, 11, 13, 14]
+idx: 6, delta: 2, matching: false, a (8): [0, 2, 3, 6, 9, 12, 13], b (5): [1, 2, 5, 6, 7, 8, 9, 10, 13, 14]
+idx: 6, delta: 3, matching: false, a (9): [2, 4, 11, 13], b (4): [0, 4, 11]
+idx: 6, delta: 4, matching: false, a (10): [0, 2, 3, 12, 13], b (3): [0, 6, 7, 8, 9]
+idx: 6, delta: 5, matching: false, a (11): [0, 3, 5, 10, 12], b (2): [0, 2, 5, 6, 7, 8, 9, 10, 13]
+idx: 6, delta: 6, matching: false, a (12): [3, 5, 10, 12], b (1): [2, 6, 7, 8, 9, 13]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 2, 4, 7, 8, 11, 13, 14], b (8): [0, 2, 3, 6, 9, 12, 13]
+idx: 7, delta: 2, matching: false, a (9): [2, 4, 11, 13], b (6): [3, 5, 10, 12]
+idx: 7, delta: 3, matching: false, a (10): [0, 2, 3, 12, 13], b (5): [1, 2, 5, 6, 7, 8, 9, 10, 13, 14]
+idx: 7, delta: 4, matching: false, a (11): [0, 3, 5, 10, 12], b (4): [0, 4, 11]
+idx: 7, delta: 5, matching: false, a (12): [3, 5, 10, 12], b (3): [0, 6, 7, 8, 9]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 2, 3, 6, 9, 12, 13], b (9): [2, 4, 11, 13]
+idx: 8, delta: 2, matching: false, a (10): [0, 2, 3, 12, 13], b (7): [0, 1, 2, 4, 7, 8, 11, 13, 14]
+idx: 8, delta: 3, matching: false, a (11): [0, 3, 5, 10, 12], b (6): [3, 5, 10, 12]
+idx: 8, delta: 3 --- found smudge!
+idx: 8, delta: 4, matching: false, a (12): [3, 5, 10, 12], b (5): [1, 2, 5, 6, 7, 8, 9, 10, 13, 14]
+idx: 8, delta: 4 --- found smudge twice!
+idx: 9, delta: 0, matching: false, a (9): [2, 4, 11, 13], b (10): [0, 2, 3, 12, 13]
+idx: 9, delta: 2, matching: false, a (11): [0, 3, 5, 10, 12], b (8): [0, 2, 3, 6, 9, 12, 13]
+idx: 9, delta: 3, matching: false, a (12): [3, 5, 10, 12], b (7): [0, 1, 2, 4, 7, 8, 11, 13, 14]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 2, 3, 12, 13], b (11): [0, 3, 5, 10, 12]
+idx: 10, delta: 2, matching: false, a (12): [3, 5, 10, 12], b (9): [2, 4, 11, 13]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 3, 5, 10, 12], b (12): [3, 5, 10, 12]
+idx: 11, delta: 0 --- found smudge!
+idx: 11 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 3, 4, 7, 8, 10, 11], b (1): [0, 5, 7]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 5, 7], b (2): [0, 1, 2, 5, 7, 8, 9, 10]
+idx: 1, delta: 2, matching: false, a (3): [0, 6, 8, 10, 11, 12], b (0): [0, 2, 3, 4, 7, 8, 10, 11]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 5, 7, 8, 9, 10], b (3): [0, 6, 8, 10, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [0, 4, 7, 9], b (1): [0, 5, 7]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 5, 6, 11, 12], b (0): [0, 2, 3, 4, 7, 8, 10, 11]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 6, 8, 10, 11, 12], b (4): [0, 4, 7, 9]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 5, 6, 11, 12], b (2): [0, 1, 2, 5, 7, 8, 9, 10]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 3, 5, 8], b (1): [0, 5, 7]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 3, 5, 7], b (0): [0, 2, 3, 4, 7, 8, 10, 11]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 4, 7, 9], b (5): [0, 2, 5, 6, 11, 12]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 3, 5, 8], b (3): [0, 6, 8, 10, 11, 12]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 3, 5, 7], b (2): [0, 1, 2, 5, 7, 8, 9, 10]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 3, 5, 7], b (1): [0, 5, 7]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 3, 5, 8], b (0): [0, 2, 3, 4, 7, 8, 10, 11]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 5, 6, 11, 12], b (6): [0, 1, 2, 3, 5, 8]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 3, 5, 7], b (4): [0, 4, 7, 9]
+idx: 5, delta: 3, matching: false, a (8): [1, 2, 3, 5, 7], b (3): [0, 6, 8, 10, 11, 12]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 3, 5, 8], b (2): [0, 1, 2, 5, 7, 8, 9, 10]
+idx: 5, delta: 5, matching: false, a (10): [0, 2, 5, 6, 11, 12], b (1): [0, 5, 7]
+idx: 5, delta: 6, matching: false, a (11): [0, 4, 7, 9], b (0): [0, 2, 3, 4, 7, 8, 10, 11]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 3, 5, 8], b (7): [1, 2, 3, 5, 7]
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 3, 5, 7], b (5): [0, 2, 5, 6, 11, 12]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 3, 5, 8], b (4): [0, 4, 7, 9]
+idx: 6, delta: 4, matching: false, a (10): [0, 2, 5, 6, 11, 12], b (3): [0, 6, 8, 10, 11, 12]
+idx: 6, delta: 5, matching: false, a (11): [0, 4, 7, 9], b (2): [0, 1, 2, 5, 7, 8, 9, 10]
+idx: 6, delta: 6, matching: false, a (12): [0, 6, 8, 10, 11, 12], b (1): [0, 5, 7]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 2, 5, 7, 8, 9, 10], b (0): [0, 2, 3, 4, 7, 8, 10, 11]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: true, a (7): [1, 2, 3, 5, 7], b (8): [1, 2, 3, 5, 7]
+idx: 7, delta: 2, matching: true, a (9): [0, 1, 2, 3, 5, 8], b (6): [0, 1, 2, 3, 5, 8]
+idx: 7, delta: 3, matching: true, a (10): [0, 2, 5, 6, 11, 12], b (5): [0, 2, 5, 6, 11, 12]
+idx: 7, delta: 4, matching: true, a (11): [0, 4, 7, 9], b (4): [0, 4, 7, 9]
+idx: 7, delta: 5, matching: true, a (12): [0, 6, 8, 10, 11, 12], b (3): [0, 6, 8, 10, 11, 12]
+idx: 7, delta: 6, matching: true, a (13): [0, 1, 2, 5, 7, 8, 9, 10], b (2): [0, 1, 2, 5, 7, 8, 9, 10]
+idx: 7, delta: 7, matching: true, a (14): [0, 5, 7], b (1): [0, 5, 7]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [1, 2, 3, 5, 7], b (9): [0, 1, 2, 3, 5, 8]
+idx: 8, delta: 2, matching: false, a (10): [0, 2, 5, 6, 11, 12], b (7): [1, 2, 3, 5, 7]
+idx: 8, delta: 3, matching: false, a (11): [0, 4, 7, 9], b (6): [0, 1, 2, 3, 5, 8]
+idx: 8, delta: 4, matching: false, a (12): [0, 6, 8, 10, 11, 12], b (5): [0, 2, 5, 6, 11, 12]
+idx: 8, delta: 5, matching: false, a (13): [0, 1, 2, 5, 7, 8, 9, 10], b (4): [0, 4, 7, 9]
+idx: 8, delta: 6, matching: false, a (14): [0, 5, 7], b (3): [0, 6, 8, 10, 11, 12]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 2, 3, 5, 8], b (10): [0, 2, 5, 6, 11, 12]
+idx: 9, delta: 2, matching: false, a (11): [0, 4, 7, 9], b (8): [1, 2, 3, 5, 7]
+idx: 9, delta: 3, matching: false, a (12): [0, 6, 8, 10, 11, 12], b (7): [1, 2, 3, 5, 7]
+idx: 9, delta: 4, matching: false, a (13): [0, 1, 2, 5, 7, 8, 9, 10], b (6): [0, 1, 2, 3, 5, 8]
+idx: 9, delta: 5, matching: false, a (14): [0, 5, 7], b (5): [0, 2, 5, 6, 11, 12]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 2, 5, 6, 11, 12], b (11): [0, 4, 7, 9]
+idx: 10, delta: 2, matching: false, a (12): [0, 6, 8, 10, 11, 12], b (9): [0, 1, 2, 3, 5, 8]
+idx: 10, delta: 3, matching: false, a (13): [0, 1, 2, 5, 7, 8, 9, 10], b (8): [1, 2, 3, 5, 7]
+idx: 10, delta: 4, matching: false, a (14): [0, 5, 7], b (7): [1, 2, 3, 5, 7]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 4, 7, 9], b (12): [0, 6, 8, 10, 11, 12]
+idx: 11, delta: 2, matching: false, a (13): [0, 1, 2, 5, 7, 8, 9, 10], b (10): [0, 2, 5, 6, 11, 12]
+idx: 11, delta: 3, matching: false, a (14): [0, 5, 7], b (9): [0, 1, 2, 3, 5, 8]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 6, 8, 10, 11, 12], b (13): [0, 1, 2, 5, 7, 8, 9, 10]
+idx: 12, delta: 2, matching: false, a (14): [0, 5, 7], b (11): [0, 4, 7, 9]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 1, 2, 5, 7, 8, 9, 10], b (14): [0, 5, 7]
+idx: 13 --- EXITING WITH false
+idx: 14 --- EXITING WITH false
+#.###..##.##.
+#....#.#.....
+###..#.####..
+#.....#.#.###
+#...#..#.#...
+#.#..##....##
+####.#..#....
+.###.#.#.....
+.###.#.#.....
+####.#..#....
+#.#..##....##
+#...#..#.#...
+#.....#.#.###
+###..#.####..
+#....#.#.....
+12 (vert: 12, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [2, 3, 4, 6, 7, 9, 10], b (1): [4, 6, 7, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [4, 6, 7, 9], b (2): [0, 1, 2, 4, 9]
+idx: 1, delta: 2, matching: false, a (3): [1, 3, 5, 6, 7, 8, 10], b (0): [2, 3, 4, 6, 7, 9, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 4, 9], b (3): [1, 3, 5, 6, 7, 8, 10]
+idx: 2, delta: 2, matching: false, a (4): [2, 5, 8], b (1): [4, 6, 7, 9]
+idx: 2, delta: 3, matching: false, a (5): [2, 5, 6, 7, 8], b (0): [2, 3, 4, 6, 7, 9, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 3, 5, 6, 7, 8, 10], b (4): [2, 5, 8]
+idx: 3, delta: 2, matching: false, a (5): [2, 5, 6, 7, 8], b (2): [0, 1, 2, 4, 9]
+idx: 3, delta: 3, matching: false, a (6): [3, 10], b (1): [4, 6, 7, 9]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2, 5, 8], b (0): [2, 3, 4, 6, 7, 9, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 5, 8], b (5): [2, 5, 6, 7, 8]
+idx: 4, delta: 2, matching: false, a (6): [3, 10], b (3): [1, 3, 5, 6, 7, 8, 10]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 2, 5, 8], b (2): [0, 1, 2, 4, 9]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 4, 5, 6, 7, 8, 9], b (1): [4, 6, 7, 9]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10], b (0): [2, 3, 4, 6, 7, 9, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 5, 6, 7, 8], b (6): [3, 10]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2, 5, 8], b (4): [2, 5, 8]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 4, 5, 6, 7, 8, 9], b (3): [1, 3, 5, 6, 7, 8, 10]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10], b (2): [0, 1, 2, 4, 9]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 2, 5, 8], b (1): [4, 6, 7, 9]
+idx: 5, delta: 6, matching: false, a (11): [3, 10], b (0): [2, 3, 4, 6, 7, 9, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [3, 10], b (7): [0, 1, 2, 5, 8]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 4, 5, 6, 7, 8, 9], b (5): [2, 5, 6, 7, 8]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10], b (4): [2, 5, 8]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 2, 5, 8], b (3): [1, 3, 5, 6, 7, 8, 10]
+idx: 6, delta: 5, matching: false, a (11): [3, 10], b (2): [0, 1, 2, 4, 9]
+idx: 6, delta: 6, matching: false, a (12): [2, 5, 6, 7, 8], b (1): [4, 6, 7, 9]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 2, 5, 8], b (8): [0, 1, 4, 5, 6, 7, 8, 9]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10], b (6): [3, 10]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 2, 5, 8], b (5): [2, 5, 6, 7, 8]
+idx: 7, delta: 4, matching: false, a (11): [3, 10], b (4): [2, 5, 8]
+idx: 7, delta: 5, matching: false, a (12): [2, 5, 6, 7, 8], b (3): [1, 3, 5, 6, 7, 8, 10]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 4, 5, 6, 7, 8, 9], b (9): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10]
+idx: 8, delta: 2, matching: true, a (10): [0, 1, 2, 5, 8], b (7): [0, 1, 2, 5, 8]
+idx: 8, delta: 3, matching: true, a (11): [3, 10], b (6): [3, 10]
+idx: 8, delta: 4, matching: true, a (12): [2, 5, 6, 7, 8], b (5): [2, 5, 6, 7, 8]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10], b (10): [0, 1, 2, 5, 8]
+idx: 9, delta: 2, matching: false, a (11): [3, 10], b (8): [0, 1, 4, 5, 6, 7, 8, 9]
+idx: 9, delta: 3, matching: false, a (12): [2, 5, 6, 7, 8], b (7): [0, 1, 2, 5, 8]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 2, 5, 8], b (11): [3, 10]
+idx: 10, delta: 2, matching: false, a (12): [2, 5, 6, 7, 8], b (9): [0, 1, 3, 4, 5, 6, 7, 8, 9, 10]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [3, 10], b (12): [2, 5, 6, 7, 8]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [2, 7, 8, 9, 10], b (1): [2, 3, 7, 8, 9, 10]
+idx: 0, delta: 0 --- found smudge!
+idx: 0 --- EXITING WITH true
+..#....####..
+..##...####..
+#.#.##.#..#.#
+#..#..#..#.#.
+###.....##...
+...###.####.#
+##.#.#..##..#
+##.#.#..##..#
+...###.####.#
+###.....##...
+#..#..#..#.#.
+100 (vert: 0, horiz: 1)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 3, 5, 9, 10, 11, 13], b (1): [0, 2, 5, 9, 10, 11, 12, 14, 15]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 5, 9, 10, 11, 12, 14, 15], b (2): [0, 2, 3, 5, 9, 10, 11, 12, 14, 15]
+idx: 1, delta: 0 --- found smudge!
+idx: 1, delta: 2, matching: true, a (3): [1, 3, 5, 9, 10, 11, 13], b (0): [1, 3, 5, 9, 10, 11, 13]
+idx: 1 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 5, 7, 10, 13], b (1): [0, 3, 6, 7, 9, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 3, 6, 7, 9, 14], b (2): [1, 2, 6, 9, 11, 12, 14]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 3, 4, 5, 7, 9, 10, 13, 14], b (0): [1, 2, 5, 7, 10, 13]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 2, 6, 9, 11, 12, 14], b (3): [0, 2, 3, 4, 5, 7, 9, 10, 13, 14]
+idx: 2, delta: 2, matching: false, a (4): [4, 6, 9, 11, 12, 14], b (1): [0, 3, 6, 7, 9, 14]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 3, 4, 5, 6, 8], b (0): [1, 2, 5, 7, 10, 13]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 3, 4, 5, 7, 9, 10, 13, 14], b (4): [4, 6, 9, 11, 12, 14]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 3, 4, 5, 6, 8], b (2): [1, 2, 6, 9, 11, 12, 14]
+idx: 3, delta: 3, matching: false, a (6): [4, 8, 10, 11, 12, 13], b (1): [0, 3, 6, 7, 9, 14]
+idx: 3, delta: 4, matching: false, a (7): [4, 5, 7], b (0): [1, 2, 5, 7, 10, 13]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [4, 6, 9, 11, 12, 14], b (5): [0, 1, 2, 3, 4, 5, 6, 8]
+idx: 4, delta: 2, matching: false, a (6): [4, 8, 10, 11, 12, 13], b (3): [0, 2, 3, 4, 5, 7, 9, 10, 13, 14]
+idx: 4, delta: 3, matching: false, a (7): [4, 5, 7], b (2): [1, 2, 6, 9, 11, 12, 14]
+idx: 4, delta: 4, matching: false, a (8): [7, 8, 10, 13], b (1): [0, 3, 6, 7, 9, 14]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 3, 5, 10, 13], b (0): [1, 2, 5, 7, 10, 13]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 3, 4, 5, 6, 8], b (6): [4, 8, 10, 11, 12, 13]
+idx: 5, delta: 2, matching: false, a (7): [4, 5, 7], b (4): [4, 6, 9, 11, 12, 14]
+idx: 5, delta: 3, matching: false, a (8): [7, 8, 10, 13], b (3): [0, 2, 3, 4, 5, 7, 9, 10, 13, 14]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 3, 5, 10, 13], b (2): [1, 2, 6, 9, 11, 12, 14]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 2, 3, 4, 7, 9, 10, 11, 12, 13, 14], b (1): [0, 3, 6, 7, 9, 14]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2, 3, 5, 8], b (0): [1, 2, 5, 7, 10, 13]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [4, 8, 10, 11, 12, 13], b (7): [4, 5, 7]
+idx: 6, delta: 2, matching: false, a (8): [7, 8, 10, 13], b (5): [0, 1, 2, 3, 4, 5, 6, 8]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 3, 5, 10, 13], b (4): [4, 6, 9, 11, 12, 14]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 2, 3, 4, 7, 9, 10, 11, 12, 13, 14], b (3): [0, 2, 3, 4, 5, 7, 9, 10, 13, 14]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 2, 3, 5, 8], b (2): [1, 2, 6, 9, 11, 12, 14]
+idx: 6, delta: 6, matching: false, a (12): [1, 2, 4, 7, 10, 13], b (1): [0, 3, 6, 7, 9, 14]
+idx: 6, delta: 7, matching: false, a (13): [0, 3, 4, 5, 6, 7, 10, 11, 12, 13], b (0): [1, 2, 5, 7, 10, 13]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [4, 5, 7], b (8): [7, 8, 10, 13]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 2, 3, 5, 10, 13], b (6): [4, 8, 10, 11, 12, 13]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 2, 3, 4, 7, 9, 10, 11, 12, 13, 14], b (5): [0, 1, 2, 3, 4, 5, 6, 8]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 2, 3, 5, 8], b (4): [4, 6, 9, 11, 12, 14]
+idx: 7, delta: 5, matching: false, a (12): [1, 2, 4, 7, 10, 13], b (3): [0, 2, 3, 4, 5, 7, 9, 10, 13, 14]
+idx: 7, delta: 6, matching: false, a (13): [0, 3, 4, 5, 6, 7, 10, 11, 12, 13], b (2): [1, 2, 6, 9, 11, 12, 14]
+idx: 7, delta: 7, matching: false, a (14): [1, 2, 8], b (1): [0, 3, 6, 7, 9, 14]
+idx: 7, delta: 8, matching: false, a (15): [1, 2, 4, 5, 6, 10, 13], b (0): [1, 2, 5, 7, 10, 13]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [7, 8, 10, 13], b (9): [0, 1, 2, 3, 5, 10, 13]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 2, 3, 4, 7, 9, 10, 11, 12, 13, 14], b (7): [4, 5, 7]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 2, 3, 5, 8], b (6): [4, 8, 10, 11, 12, 13]
+idx: 8, delta: 4, matching: false, a (12): [1, 2, 4, 7, 10, 13], b (5): [0, 1, 2, 3, 4, 5, 6, 8]
+idx: 8, delta: 5, matching: false, a (13): [0, 3, 4, 5, 6, 7, 10, 11, 12, 13], b (4): [4, 6, 9, 11, 12, 14]
+idx: 8, delta: 6, matching: false, a (14): [1, 2, 8], b (3): [0, 2, 3, 4, 5, 7, 9, 10, 13, 14]
+idx: 8, delta: 7, matching: false, a (15): [1, 2, 4, 5, 6, 10, 13], b (2): [1, 2, 6, 9, 11, 12, 14]
+idx: 8, delta: 8, matching: false, a (16): [4, 5, 7, 11, 12], b (1): [0, 3, 6, 7, 9, 14]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 2, 3, 5, 10, 13], b (10): [0, 1, 2, 3, 4, 7, 9, 10, 11, 12, 13, 14]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 2, 3, 5, 8], b (8): [7, 8, 10, 13]
+idx: 9, delta: 3, matching: false, a (12): [1, 2, 4, 7, 10, 13], b (7): [4, 5, 7]
+idx: 9, delta: 4, matching: false, a (13): [0, 3, 4, 5, 6, 7, 10, 11, 12, 13], b (6): [4, 8, 10, 11, 12, 13]
+idx: 9, delta: 5, matching: false, a (14): [1, 2, 8], b (5): [0, 1, 2, 3, 4, 5, 6, 8]
+idx: 9, delta: 6, matching: false, a (15): [1, 2, 4, 5, 6, 10, 13], b (4): [4, 6, 9, 11, 12, 14]
+idx: 9, delta: 7, matching: false, a (16): [4, 5, 7, 11, 12], b (3): [0, 2, 3, 4, 5, 7, 9, 10, 13, 14]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 2, 3, 4, 7, 9, 10, 11, 12, 13, 14], b (11): [0, 1, 2, 3, 5, 8]
+idx: 10, delta: 2, matching: false, a (12): [1, 2, 4, 7, 10, 13], b (9): [0, 1, 2, 3, 5, 10, 13]
+idx: 10, delta: 3, matching: false, a (13): [0, 3, 4, 5, 6, 7, 10, 11, 12, 13], b (8): [7, 8, 10, 13]
+idx: 10, delta: 4, matching: false, a (14): [1, 2, 8], b (7): [4, 5, 7]
+idx: 10, delta: 5, matching: false, a (15): [1, 2, 4, 5, 6, 10, 13], b (6): [4, 8, 10, 11, 12, 13]
+idx: 10, delta: 6, matching: false, a (16): [4, 5, 7, 11, 12], b (5): [0, 1, 2, 3, 4, 5, 6, 8]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 2, 3, 5, 8], b (12): [1, 2, 4, 7, 10, 13]
+idx: 11, delta: 2, matching: false, a (13): [0, 3, 4, 5, 6, 7, 10, 11, 12, 13], b (10): [0, 1, 2, 3, 4, 7, 9, 10, 11, 12, 13, 14]
+idx: 11, delta: 3, matching: false, a (14): [1, 2, 8], b (9): [0, 1, 2, 3, 5, 10, 13]
+idx: 11, delta: 4, matching: false, a (15): [1, 2, 4, 5, 6, 10, 13], b (8): [7, 8, 10, 13]
+idx: 11, delta: 5, matching: false, a (16): [4, 5, 7, 11, 12], b (7): [4, 5, 7]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [1, 2, 4, 7, 10, 13], b (13): [0, 3, 4, 5, 6, 7, 10, 11, 12, 13]
+idx: 12, delta: 2, matching: false, a (14): [1, 2, 8], b (11): [0, 1, 2, 3, 5, 8]
+idx: 12, delta: 3, matching: false, a (15): [1, 2, 4, 5, 6, 10, 13], b (10): [0, 1, 2, 3, 4, 7, 9, 10, 11, 12, 13, 14]
+idx: 12, delta: 4, matching: false, a (16): [4, 5, 7, 11, 12], b (9): [0, 1, 2, 3, 5, 10, 13]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 3, 4, 5, 6, 7, 10, 11, 12, 13], b (14): [1, 2, 8]
+idx: 13, delta: 2, matching: false, a (15): [1, 2, 4, 5, 6, 10, 13], b (12): [1, 2, 4, 7, 10, 13]
+idx: 13, delta: 3, matching: false, a (16): [4, 5, 7, 11, 12], b (11): [0, 1, 2, 3, 5, 8]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [1, 2, 8], b (15): [1, 2, 4, 5, 6, 10, 13]
+idx: 14, delta: 2, matching: false, a (16): [4, 5, 7, 11, 12], b (13): [0, 3, 4, 5, 6, 7, 10, 11, 12, 13]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: false, a (15): [1, 2, 4, 5, 6, 10, 13], b (16): [4, 5, 7, 11, 12]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+.##..#.#..#..#.
+#..#..##.#....#
+.##...#..#.##.#
+#.####.#.##..##
+....#.#..#.##.#
+#######.#......
+....#...#.####.
+....##.#.......
+.......##.#..#.
+####.#....#..#.
+#####..#.######
+####.#..#......
+.##.#..#..#..#.
+#..#####..####.
+.##.....#......
+.##.###...#..#.
+....##.#...##..
+2 (vert: 2, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 4, 7, 8, 11, 12, 15], b (1): [0, 1, 3, 4, 5, 6, 8, 9, 10, 11, 13, 14, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 3, 4, 5, 6, 8, 9, 10, 11, 13, 14, 16], b (2): [1, 2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 3, 4, 6, 13, 15, 16], b (0): [0, 4, 7, 8, 11, 12, 15]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14], b (3): [0, 2, 3, 4, 6, 13, 15, 16]
+idx: 2, delta: 2, matching: false, a (4): [3, 6, 7, 12, 13, 16], b (1): [0, 1, 3, 4, 5, 6, 8, 9, 10, 11, 13, 14, 16]
+idx: 2, delta: 3, matching: false, a (5): [3, 6, 7, 12, 13, 16], b (0): [0, 4, 7, 8, 11, 12, 15]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 3, 4, 6, 13, 15, 16], b (4): [3, 6, 7, 12, 13, 16]
+idx: 3, delta: 2, matching: false, a (5): [3, 6, 7, 12, 13, 16], b (2): [1, 2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 3, 4, 6, 13, 15, 16], b (1): [0, 1, 3, 4, 5, 6, 8, 9, 10, 11, 13, 14, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: true, a (4): [3, 6, 7, 12, 13, 16], b (5): [3, 6, 7, 12, 13, 16]
+idx: 4, delta: 2, matching: true, a (6): [0, 2, 3, 4, 6, 13, 15, 16], b (3): [0, 2, 3, 4, 6, 13, 15, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [3, 6, 7, 12, 13, 16], b (6): [0, 2, 3, 4, 6, 13, 15, 16]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 6], b (1): [1, 2]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2], b (2): [2, 3, 6]
+idx: 1, delta: 2, matching: false, a (3): [1, 3, 4, 5, 6], b (0): [0, 1, 3, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 3, 6], b (3): [1, 3, 4, 5, 6]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 6], b (1): [1, 2]
+idx: 2, delta: 3, matching: false, a (5): [1, 2], b (0): [0, 1, 3, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 3, 4, 5, 6], b (4): [0, 1, 3, 6]
+idx: 3, delta: 2, matching: false, a (5): [1, 2], b (2): [2, 3, 6]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 3, 4, 5, 6], b (1): [1, 2]
+idx: 3, delta: 4, matching: false, a (7): [0, 2, 4, 5], b (0): [0, 1, 3, 6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3, 6], b (5): [1, 2]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 3, 4, 5, 6], b (3): [1, 3, 4, 5, 6]
+idx: 4, delta: 2 --- found smudge!
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 4, 5], b (2): [2, 3, 6]
+idx: 4, delta: 3 --- found smudge twice!
+idx: 5, delta: 0, matching: false, a (5): [1, 2], b (6): [1, 2, 3, 4, 5, 6]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 4, 5], b (4): [0, 1, 3, 6]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2], b (3): [1, 3, 4, 5, 6]
+idx: 5, delta: 4, matching: false, a (9): [1, 2], b (2): [2, 3, 6]
+idx: 5, delta: 5, matching: true, a (10): [1, 2], b (1): [1, 2]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2], b (0): [0, 1, 3, 6]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 3, 4, 5, 6], b (7): [0, 2, 4, 5]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2], b (5): [1, 2]
+idx: 6, delta: 2 --- found smudge!
+idx: 6, delta: 3, matching: false, a (9): [1, 2], b (4): [0, 1, 3, 6]
+idx: 6, delta: 3 --- found smudge twice!
+idx: 7, delta: 0, matching: false, a (7): [0, 2, 4, 5], b (8): [0, 1, 2]
+idx: 7, delta: 2, matching: false, a (9): [1, 2], b (6): [1, 2, 3, 4, 5, 6]
+idx: 7, delta: 3, matching: true, a (10): [1, 2], b (5): [1, 2]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 2], b (4): [0, 1, 3, 6]
+idx: 7, delta: 5, matching: false, a (12): [0, 2, 4, 5], b (3): [1, 3, 4, 5, 6]
+idx: 7, delta: 6, matching: false, a (13): [1, 2, 3, 4, 5, 6], b (2): [2, 3, 6]
+idx: 7, delta: 7, matching: true, a (14): [1, 2], b (1): [1, 2]
+idx: 7, delta: 8, matching: false, a (15): [0, 3, 6], b (0): [0, 1, 3, 6]
+idx: 7, delta: 8 --- found smudge!
+idx: 7 --- EXITING WITH true
+##.#..#
+.##....
+..##..#
+.#.####
+##.#..#
+.##....
+.######
+#.#.##.
+###....
+.##....
+.##....
+###....
+#.#.##.
+.######
+.##....
+#..#..#
+.#.####
+800 (vert: 0, horiz: 8)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 3, 6], b (1): [0, 4, 5, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 4, 5, 6], b (2): [1, 2, 4]
+idx: 1, delta: 2, matching: false, a (3): [5, 8], b (0): [0, 2, 3, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 2, 4], b (3): [5, 8]
+idx: 2, delta: 2, matching: false, a (4): [2, 5, 6, 8], b (1): [0, 4, 5, 6]
+idx: 2, delta: 3, matching: false, a (5): [2, 5, 6, 8], b (0): [0, 2, 3, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [5, 8], b (4): [2, 5, 6, 8]
+idx: 3, delta: 2, matching: false, a (5): [2, 5, 6, 8], b (2): [1, 2, 4]
+idx: 3, delta: 3, matching: false, a (6): [5, 8], b (1): [0, 4, 5, 6]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 4], b (0): [0, 2, 3, 6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: true, a (4): [2, 5, 6, 8], b (5): [2, 5, 6, 8]
+idx: 4, delta: 2, matching: true, a (6): [5, 8], b (3): [5, 8]
+idx: 4, delta: 3, matching: true, a (7): [1, 2, 4], b (2): [1, 2, 4]
+idx: 4, delta: 4, matching: true, a (8): [0, 4, 5, 6], b (1): [0, 4, 5, 6]
+idx: 4, delta: 5, matching: true, a (9): [0, 2, 3, 6], b (0): [0, 2, 3, 6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 5, 6, 8], b (6): [5, 8]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 4], b (4): [2, 5, 6, 8]
+idx: 5, delta: 3, matching: false, a (8): [0, 4, 5, 6], b (3): [5, 8]
+idx: 5, delta: 4, matching: false, a (9): [0, 2, 3, 6], b (2): [1, 2, 4]
+idx: 5, delta: 5, matching: false, a (10): [0, 3, 4, 7], b (1): [0, 4, 5, 6]
+idx: 5, delta: 6, matching: false, a (11): [1, 3, 4, 5, 7, 8], b (0): [0, 2, 3, 6]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [5, 8], b (7): [1, 2, 4]
+idx: 6, delta: 2, matching: false, a (8): [0, 4, 5, 6], b (5): [2, 5, 6, 8]
+idx: 6, delta: 3, matching: false, a (9): [0, 2, 3, 6], b (4): [2, 5, 6, 8]
+idx: 6, delta: 4, matching: false, a (10): [0, 3, 4, 7], b (3): [5, 8]
+idx: 6, delta: 5, matching: false, a (11): [1, 3, 4, 5, 7, 8], b (2): [1, 2, 4]
+idx: 6, delta: 6, matching: false, a (12): [1, 3, 4, 5, 7, 8], b (1): [0, 4, 5, 6]
+idx: 6, delta: 7, matching: false, a (13): [0, 3, 4, 7], b (0): [0, 2, 3, 6]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 4], b (8): [0, 4, 5, 6]
+idx: 7, delta: 2, matching: false, a (9): [0, 2, 3, 6], b (6): [5, 8]
+idx: 7, delta: 3, matching: false, a (10): [0, 3, 4, 7], b (5): [2, 5, 6, 8]
+idx: 7, delta: 4, matching: false, a (11): [1, 3, 4, 5, 7, 8], b (4): [2, 5, 6, 8]
+idx: 7, delta: 5, matching: false, a (12): [1, 3, 4, 5, 7, 8], b (3): [5, 8]
+idx: 7, delta: 6, matching: false, a (13): [0, 3, 4, 7], b (2): [1, 2, 4]
+idx: 7, delta: 7, matching: false, a (14): [0, 2, 3, 6], b (1): [0, 4, 5, 6]
+idx: 7, delta: 8, matching: false, a (15): [0, 4, 5, 6], b (0): [0, 2, 3, 6]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 4, 5, 6], b (9): [0, 2, 3, 6]
+idx: 8, delta: 2, matching: false, a (10): [0, 3, 4, 7], b (7): [1, 2, 4]
+idx: 8, delta: 3, matching: false, a (11): [1, 3, 4, 5, 7, 8], b (6): [5, 8]
+idx: 8, delta: 4, matching: false, a (12): [1, 3, 4, 5, 7, 8], b (5): [2, 5, 6, 8]
+idx: 8, delta: 5, matching: false, a (13): [0, 3, 4, 7], b (4): [2, 5, 6, 8]
+idx: 8, delta: 6, matching: false, a (14): [0, 2, 3, 6], b (3): [5, 8]
+idx: 8, delta: 7, matching: false, a (15): [0, 4, 5, 6], b (2): [1, 2, 4]
+idx: 8, delta: 8, matching: false, a (16): [1, 2, 4, 6], b (1): [0, 4, 5, 6]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 2, 3, 6], b (10): [0, 3, 4, 7]
+idx: 9, delta: 2, matching: false, a (11): [1, 3, 4, 5, 7, 8], b (8): [0, 4, 5, 6]
+idx: 9, delta: 3, matching: false, a (12): [1, 3, 4, 5, 7, 8], b (7): [1, 2, 4]
+idx: 9, delta: 4, matching: false, a (13): [0, 3, 4, 7], b (6): [5, 8]
+idx: 9, delta: 5, matching: false, a (14): [0, 2, 3, 6], b (5): [2, 5, 6, 8]
+idx: 9, delta: 6, matching: false, a (15): [0, 4, 5, 6], b (4): [2, 5, 6, 8]
+idx: 9, delta: 7, matching: false, a (16): [1, 2, 4, 6], b (3): [5, 8]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 3, 4, 7], b (11): [1, 3, 4, 5, 7, 8]
+idx: 10, delta: 2, matching: false, a (12): [1, 3, 4, 5, 7, 8], b (9): [0, 2, 3, 6]
+idx: 10, delta: 3, matching: false, a (13): [0, 3, 4, 7], b (8): [0, 4, 5, 6]
+idx: 10, delta: 4, matching: false, a (14): [0, 2, 3, 6], b (7): [1, 2, 4]
+idx: 10, delta: 5, matching: false, a (15): [0, 4, 5, 6], b (6): [5, 8]
+idx: 10, delta: 6, matching: false, a (16): [1, 2, 4, 6], b (5): [2, 5, 6, 8]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: true, a (11): [1, 3, 4, 5, 7, 8], b (12): [1, 3, 4, 5, 7, 8]
+idx: 11, delta: 2, matching: true, a (13): [0, 3, 4, 7], b (10): [0, 3, 4, 7]
+idx: 11, delta: 3, matching: true, a (14): [0, 2, 3, 6], b (9): [0, 2, 3, 6]
+idx: 11, delta: 4, matching: true, a (15): [0, 4, 5, 6], b (8): [0, 4, 5, 6]
+idx: 11, delta: 5, matching: false, a (16): [1, 2, 4, 6], b (7): [1, 2, 4]
+idx: 11, delta: 5 --- found smudge!
+idx: 11 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 8, 9, 10, 13, 14, 15], b (1): [2, 7, 11, 12, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 7, 11, 12, 16], b (2): [0, 2, 4, 5, 7, 9, 14, 16]
+idx: 1, delta: 2, matching: false, a (3): [0, 9, 10, 11, 12, 13, 14], b (0): [0, 1, 8, 9, 10, 13, 14, 15]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 4, 5, 7, 9, 14, 16], b (3): [0, 9, 10, 11, 12, 13, 14]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 7, 8, 10, 11, 12, 13, 15, 16], b (1): [2, 7, 11, 12, 16]
+idx: 2, delta: 3, matching: false, a (5): [1, 3, 4, 5, 6, 8, 11, 12, 15], b (0): [0, 1, 8, 9, 10, 13, 14, 15]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 9, 10, 11, 12, 13, 14], b (4): [1, 2, 7, 8, 10, 11, 12, 13, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [1, 3, 4, 5, 6, 8, 11, 12, 15], b (2): [0, 2, 4, 5, 7, 9, 14, 16]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 4, 5, 8, 9, 14, 15, 16], b (1): [2, 7, 11, 12, 16]
+idx: 3, delta: 4, matching: false, a (7): [10, 11, 12, 13], b (0): [0, 1, 8, 9, 10, 13, 14, 15]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 7, 8, 10, 11, 12, 13, 15, 16], b (5): [1, 3, 4, 5, 6, 8, 11, 12, 15]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 4, 5, 8, 9, 14, 15, 16], b (3): [0, 9, 10, 11, 12, 13, 14]
+idx: 4, delta: 3, matching: false, a (7): [10, 11, 12, 13], b (2): [0, 2, 4, 5, 7, 9, 14, 16]
+idx: 4, delta: 4, matching: false, a (8): [3, 4, 5, 6, 11, 12], b (1): [2, 7, 11, 12, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 3, 4, 5, 6, 8, 11, 12, 15], b (6): [0, 1, 4, 5, 8, 9, 14, 15, 16]
+idx: 5, delta: 2, matching: false, a (7): [10, 11, 12, 13], b (4): [1, 2, 7, 8, 10, 11, 12, 13, 15, 16]
+idx: 5, delta: 3, matching: false, a (8): [3, 4, 5, 6, 11, 12], b (3): [0, 9, 10, 11, 12, 13, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 4, 5, 8, 9, 14, 15, 16], b (7): [10, 11, 12, 13]
+idx: 6, delta: 2, matching: false, a (8): [3, 4, 5, 6, 11, 12], b (5): [1, 3, 4, 5, 6, 8, 11, 12, 15]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [10, 11, 12, 13], b (8): [3, 4, 5, 6, 11, 12]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+##......###..###.
+..#....#...##...#
+#.#.##.#.#....#.#
+#........######..
+.##....##.####.##
+.#.####.#..##..#.
+##..##..##....###
+..........####...
+...####....##....
+12 (vert: 12, horiz: 0)
+
+idx: 0, delta: 0, matching: true, a (0): [0, 1, 2, 3, 4, 7], b (1): [0, 1, 2, 3, 4, 7]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 3, 4, 7], b (2): [1, 2, 4, 7, 8]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 5, 6, 7, 8], b (0): [0, 1, 2, 3, 4, 7]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 2, 4, 7, 8], b (3): [2, 3, 5, 6, 7, 8]
+idx: 2, delta: 2, matching: false, a (4): [2, 3, 4, 5], b (1): [0, 1, 2, 3, 4, 7]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 4, 7], b (0): [0, 1, 2, 3, 4, 7]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 3, 5, 6, 7, 8], b (4): [2, 3, 4, 5]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 4, 7], b (2): [1, 2, 4, 7, 8]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 4, 5, 6, 8], b (1): [0, 1, 2, 3, 4, 7]
+idx: 3, delta: 4, matching: false, a (7): [2, 4, 6], b (0): [0, 1, 2, 3, 4, 7]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 3, 4, 5], b (5): [0, 1, 4, 7]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 4, 5, 6, 8], b (3): [2, 3, 5, 6, 7, 8]
+idx: 4, delta: 3, matching: false, a (7): [2, 4, 6], b (2): [1, 2, 4, 7, 8]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 6, 7, 8], b (1): [0, 1, 2, 3, 4, 7]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 6, 7, 8], b (0): [0, 1, 2, 3, 4, 7]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 4, 7], b (6): [0, 1, 2, 4, 5, 6, 8]
+idx: 5, delta: 2, matching: false, a (7): [2, 4, 6], b (4): [2, 3, 4, 5]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 6, 7, 8], b (3): [2, 3, 5, 6, 7, 8]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 6, 7, 8], b (2): [1, 2, 4, 7, 8]
+idx: 5, delta: 5, matching: false, a (10): [2, 4, 6], b (1): [0, 1, 2, 3, 4, 7]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2, 4, 5, 6, 8], b (0): [0, 1, 2, 3, 4, 7]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 4, 5, 6, 8], b (7): [2, 4, 6]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 6, 7, 8], b (5): [0, 1, 4, 7]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 6, 7, 8], b (4): [2, 3, 4, 5]
+idx: 6, delta: 4, matching: false, a (10): [2, 4, 6], b (3): [2, 3, 5, 6, 7, 8]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 2, 4, 5, 6, 8], b (2): [1, 2, 4, 7, 8]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 4, 7], b (1): [0, 1, 2, 3, 4, 7]
+idx: 6, delta: 7, matching: false, a (13): [2, 3, 4, 5], b (0): [0, 1, 2, 3, 4, 7]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [2, 4, 6], b (8): [0, 1, 6, 7, 8]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 6, 7, 8], b (6): [0, 1, 2, 4, 5, 6, 8]
+idx: 7, delta: 3, matching: false, a (10): [2, 4, 6], b (5): [0, 1, 4, 7]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 2, 4, 5, 6, 8], b (4): [2, 3, 4, 5]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 4, 7], b (3): [2, 3, 5, 6, 7, 8]
+idx: 7, delta: 6, matching: false, a (13): [2, 3, 4, 5], b (2): [1, 2, 4, 7, 8]
+idx: 7, delta: 7, matching: false, a (14): [2, 3, 5, 6, 7, 8], b (1): [0, 1, 2, 3, 4, 7]
+idx: 7, delta: 8, matching: false, a (15): [1, 2, 4, 7, 8], b (0): [0, 1, 2, 3, 4, 7]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: true, a (8): [0, 1, 6, 7, 8], b (9): [0, 1, 6, 7, 8]
+idx: 8, delta: 2, matching: true, a (10): [2, 4, 6], b (7): [2, 4, 6]
+idx: 8, delta: 3, matching: true, a (11): [0, 1, 2, 4, 5, 6, 8], b (6): [0, 1, 2, 4, 5, 6, 8]
+idx: 8, delta: 4, matching: true, a (12): [0, 1, 4, 7], b (5): [0, 1, 4, 7]
+idx: 8, delta: 5, matching: true, a (13): [2, 3, 4, 5], b (4): [2, 3, 4, 5]
+idx: 8, delta: 6, matching: true, a (14): [2, 3, 5, 6, 7, 8], b (3): [2, 3, 5, 6, 7, 8]
+idx: 8, delta: 7, matching: true, a (15): [1, 2, 4, 7, 8], b (2): [1, 2, 4, 7, 8]
+idx: 8, delta: 8, matching: false, a (16): [0, 1, 2, 3, 4, 7, 8], b (1): [0, 1, 2, 3, 4, 7]
+idx: 8, delta: 8 --- found smudge!
+idx: 8 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 5, 6, 8, 9, 11, 12, 16], b (1): [0, 1, 2, 5, 6, 8, 9, 11, 12, 15, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 5, 6, 8, 9, 11, 12, 15, 16], b (2): [0, 1, 2, 3, 4, 6, 7, 10, 11, 13, 14, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 3, 4, 13, 14, 16], b (0): [0, 1, 5, 6, 8, 9, 11, 12, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 4, 6, 7, 10, 11, 13, 14, 15, 16], b (3): [0, 1, 3, 4, 13, 14, 16]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 4, 5, 6, 7, 10, 11, 12, 13, 15, 16], b (1): [0, 1, 2, 5, 6, 8, 9, 11, 12, 15, 16]
+idx: 2, delta: 3, matching: false, a (5): [3, 4, 6, 11, 13, 14], b (0): [0, 1, 5, 6, 8, 9, 11, 12, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 3, 4, 13, 14, 16], b (4): [0, 1, 2, 4, 5, 6, 7, 10, 11, 12, 13, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [3, 4, 6, 11, 13, 14], b (2): [0, 1, 2, 3, 4, 6, 7, 10, 11, 13, 14, 15, 16]
+idx: 3, delta: 3, matching: false, a (6): [3, 6, 7, 8, 9, 10, 11, 14], b (1): [0, 1, 2, 5, 6, 8, 9, 11, 12, 15, 16]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2, 3, 5, 8, 9, 12, 14, 15, 16], b (0): [0, 1, 5, 6, 8, 9, 11, 12, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 4, 5, 6, 7, 10, 11, 12, 13, 15, 16], b (5): [3, 4, 6, 11, 13, 14]
+idx: 4, delta: 2, matching: false, a (6): [3, 6, 7, 8, 9, 10, 11, 14], b (3): [0, 1, 3, 4, 13, 14, 16]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 2, 3, 5, 8, 9, 12, 14, 15, 16], b (2): [0, 1, 2, 3, 4, 6, 7, 10, 11, 13, 14, 15, 16]
+idx: 4, delta: 4, matching: false, a (8): [2, 3, 6, 8, 9, 11, 14, 15, 16], b (1): [0, 1, 2, 5, 6, 8, 9, 11, 12, 15, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [3, 4, 6, 11, 13, 14], b (6): [3, 6, 7, 8, 9, 10, 11, 14]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2, 3, 5, 8, 9, 12, 14, 15, 16], b (4): [0, 1, 2, 4, 5, 6, 7, 10, 11, 12, 13, 15, 16]
+idx: 5, delta: 3, matching: false, a (8): [2, 3, 6, 8, 9, 11, 14, 15, 16], b (3): [0, 1, 3, 4, 13, 14, 16]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [3, 6, 7, 8, 9, 10, 11, 14], b (7): [0, 1, 2, 3, 5, 8, 9, 12, 14, 15, 16]
+idx: 6, delta: 2, matching: false, a (8): [2, 3, 6, 8, 9, 11, 14, 15, 16], b (5): [3, 4, 6, 11, 13, 14]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 2, 3, 5, 8, 9, 12, 14, 15, 16], b (8): [2, 3, 6, 8, 9, 11, 14, 15, 16]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+##...##.##.##...#
+###..##.##.##..##
+#####.##..##.####
+##.##........##.#
+###.####..####.##
+...##.#....#.##..
+...#..######..#..
+####.#..##..#.###
+..##..#.##.#..###
+9 (vert: 9, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [3, 4, 5, 8, 9, 10], b (1): [1, 3, 5, 6, 7, 8, 10, 12, 15]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 3, 5, 6, 7, 8, 10, 12, 15], b (2): [0, 1, 4, 9, 12, 13, 14, 15]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 3, 4, 5, 8, 9, 10, 12, 13, 14, 15], b (0): [3, 4, 5, 8, 9, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 4, 9, 12, 13, 14, 15], b (3): [0, 1, 3, 4, 5, 8, 9, 10, 12, 13, 14, 15]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 15, 16], b (1): [1, 3, 5, 6, 7, 8, 10, 12, 15]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 5, 6, 7, 8, 11, 12, 15, 16], b (0): [3, 4, 5, 8, 9, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 3, 4, 5, 8, 9, 10, 12, 13, 14, 15], b (4): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 5, 6, 7, 8, 11, 12, 15, 16], b (2): [0, 1, 4, 9, 12, 13, 14, 15]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 3, 4, 9, 10, 11, 13, 14, 16], b (1): [1, 3, 5, 6, 7, 8, 10, 12, 15]
+idx: 3, delta: 4, matching: false, a (7): [0, 2, 3, 4, 5, 8, 9, 10, 11, 13, 14, 16], b (0): [3, 4, 5, 8, 9, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 15, 16], b (5): [1, 2, 5, 6, 7, 8, 11, 12, 15, 16]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 3, 4, 9, 10, 11, 13, 14, 16], b (3): [0, 1, 3, 4, 5, 8, 9, 10, 12, 13, 14, 15]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 3, 4, 5, 8, 9, 10, 11, 13, 14, 16], b (2): [0, 1, 4, 9, 12, 13, 14, 15]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 3, 10, 11, 12, 16], b (1): [1, 3, 5, 6, 7, 8, 10, 12, 15]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 5, 6, 7, 8, 11, 12, 15, 16], b (6): [0, 2, 3, 4, 9, 10, 11, 13, 14, 16]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 3, 4, 5, 8, 9, 10, 11, 13, 14, 16], b (4): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 15, 16]
+idx: 5, delta: 3, matching: false, a (8): [1, 2, 3, 10, 11, 12, 16], b (3): [0, 1, 3, 4, 5, 8, 9, 10, 12, 13, 14, 15]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 2, 3, 4, 9, 10, 11, 13, 14, 16], b (7): [0, 2, 3, 4, 5, 8, 9, 10, 11, 13, 14, 16]
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 3, 10, 11, 12, 16], b (5): [1, 2, 5, 6, 7, 8, 11, 12, 15, 16]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 2, 3, 4, 5, 8, 9, 10, 11, 13, 14, 16], b (8): [1, 2, 3, 10, 11, 12, 16]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [2, 3, 4, 6, 7], b (1): [1, 2, 3, 4, 5, 8]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 3, 4, 5, 8], b (2): [4, 5, 6, 7, 8]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 3, 6, 7, 8], b (0): [2, 3, 4, 6, 7]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [4, 5, 6, 7, 8], b (3): [0, 1, 3, 6, 7, 8]
+idx: 2, delta: 2, matching: false, a (4): [0, 2, 3, 6, 7], b (1): [1, 2, 3, 4, 5, 8]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 3, 4, 5, 7], b (0): [2, 3, 4, 6, 7]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 3, 6, 7, 8], b (4): [0, 2, 3, 6, 7]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 3, 4, 5, 7], b (2): [4, 5, 6, 7, 8]
+idx: 3, delta: 3, matching: false, a (6): [1, 4, 5], b (1): [1, 2, 3, 4, 5, 8]
+idx: 3, delta: 4, matching: false, a (7): [1, 4, 5], b (0): [2, 3, 4, 6, 7]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 2, 3, 6, 7], b (5): [0, 1, 3, 4, 5, 7]
+idx: 4, delta: 2, matching: false, a (6): [1, 4, 5], b (3): [0, 1, 3, 6, 7, 8]
+idx: 4, delta: 3, matching: false, a (7): [1, 4, 5], b (2): [4, 5, 6, 7, 8]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 3, 4, 5, 7], b (1): [1, 2, 3, 4, 5, 8]
+idx: 4, delta: 5, matching: false, a (9): [0, 2, 3, 6, 7], b (0): [2, 3, 4, 6, 7]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 3, 4, 5, 7], b (6): [1, 4, 5]
+idx: 5, delta: 2, matching: false, a (7): [1, 4, 5], b (4): [0, 2, 3, 6, 7]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 3, 4, 5, 7], b (3): [0, 1, 3, 6, 7, 8]
+idx: 5, delta: 4, matching: false, a (9): [0, 2, 3, 6, 7], b (2): [4, 5, 6, 7, 8]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 3, 6, 7, 8], b (1): [1, 2, 3, 4, 5, 8]
+idx: 5, delta: 6, matching: false, a (11): [4, 5, 6, 7, 8], b (0): [2, 3, 4, 6, 7]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: true, a (6): [1, 4, 5], b (7): [1, 4, 5]
+idx: 6, delta: 2, matching: true, a (8): [0, 1, 3, 4, 5, 7], b (5): [0, 1, 3, 4, 5, 7]
+idx: 6, delta: 3, matching: true, a (9): [0, 2, 3, 6, 7], b (4): [0, 2, 3, 6, 7]
+idx: 6, delta: 4, matching: true, a (10): [0, 1, 3, 6, 7, 8], b (3): [0, 1, 3, 6, 7, 8]
+idx: 6, delta: 5, matching: true, a (11): [4, 5, 6, 7, 8], b (2): [4, 5, 6, 7, 8]
+idx: 6, delta: 6, matching: true, a (12): [1, 2, 3, 4, 5, 8], b (1): [1, 2, 3, 4, 5, 8]
+idx: 6, delta: 7, matching: true, a (13): [2, 3, 4, 6, 7], b (0): [2, 3, 4, 6, 7]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 4, 5], b (8): [0, 1, 3, 4, 5, 7]
+idx: 7, delta: 2, matching: false, a (9): [0, 2, 3, 6, 7], b (6): [1, 4, 5]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 3, 6, 7, 8], b (5): [0, 1, 3, 4, 5, 7]
+idx: 7, delta: 4, matching: false, a (11): [4, 5, 6, 7, 8], b (4): [0, 2, 3, 6, 7]
+idx: 7, delta: 5, matching: false, a (12): [1, 2, 3, 4, 5, 8], b (3): [0, 1, 3, 6, 7, 8]
+idx: 7, delta: 6, matching: false, a (13): [2, 3, 4, 6, 7], b (2): [4, 5, 6, 7, 8]
+idx: 7, delta: 7, matching: false, a (14): [2, 3, 4, 6, 7], b (1): [1, 2, 3, 4, 5, 8]
+idx: 7, delta: 8, matching: false, a (15): [1, 2, 3, 4, 5], b (0): [2, 3, 4, 6, 7]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 3, 4, 5, 7], b (9): [0, 2, 3, 6, 7]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 3, 6, 7, 8], b (7): [1, 4, 5]
+idx: 8, delta: 3, matching: false, a (11): [4, 5, 6, 7, 8], b (6): [1, 4, 5]
+idx: 8, delta: 4, matching: false, a (12): [1, 2, 3, 4, 5, 8], b (5): [0, 1, 3, 4, 5, 7]
+idx: 8, delta: 5, matching: false, a (13): [2, 3, 4, 6, 7], b (4): [0, 2, 3, 6, 7]
+idx: 8, delta: 6, matching: false, a (14): [2, 3, 4, 6, 7], b (3): [0, 1, 3, 6, 7, 8]
+idx: 8, delta: 7, matching: false, a (15): [1, 2, 3, 4, 5], b (2): [4, 5, 6, 7, 8]
+idx: 8, delta: 8, matching: false, a (16): [4, 5, 6, 7, 8], b (1): [1, 2, 3, 4, 5, 8]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 2, 3, 6, 7], b (10): [0, 1, 3, 6, 7, 8]
+idx: 9, delta: 2, matching: false, a (11): [4, 5, 6, 7, 8], b (8): [0, 1, 3, 4, 5, 7]
+idx: 9, delta: 3, matching: false, a (12): [1, 2, 3, 4, 5, 8], b (7): [1, 4, 5]
+idx: 9, delta: 4, matching: false, a (13): [2, 3, 4, 6, 7], b (6): [1, 4, 5]
+idx: 9, delta: 5, matching: false, a (14): [2, 3, 4, 6, 7], b (5): [0, 1, 3, 4, 5, 7]
+idx: 9, delta: 6, matching: false, a (15): [1, 2, 3, 4, 5], b (4): [0, 2, 3, 6, 7]
+idx: 9, delta: 7, matching: false, a (16): [4, 5, 6, 7, 8], b (3): [0, 1, 3, 6, 7, 8]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 3, 6, 7, 8], b (11): [4, 5, 6, 7, 8]
+idx: 10, delta: 2, matching: false, a (12): [1, 2, 3, 4, 5, 8], b (9): [0, 2, 3, 6, 7]
+idx: 10, delta: 3, matching: false, a (13): [2, 3, 4, 6, 7], b (8): [0, 1, 3, 4, 5, 7]
+idx: 10, delta: 4, matching: false, a (14): [2, 3, 4, 6, 7], b (7): [1, 4, 5]
+idx: 10, delta: 5, matching: false, a (15): [1, 2, 3, 4, 5], b (6): [1, 4, 5]
+idx: 10, delta: 6, matching: false, a (16): [4, 5, 6, 7, 8], b (5): [0, 1, 3, 4, 5, 7]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [4, 5, 6, 7, 8], b (12): [1, 2, 3, 4, 5, 8]
+idx: 11, delta: 2, matching: false, a (13): [2, 3, 4, 6, 7], b (10): [0, 1, 3, 6, 7, 8]
+idx: 11, delta: 3, matching: false, a (14): [2, 3, 4, 6, 7], b (9): [0, 2, 3, 6, 7]
+idx: 11, delta: 4, matching: false, a (15): [1, 2, 3, 4, 5], b (8): [0, 1, 3, 4, 5, 7]
+idx: 11, delta: 5, matching: false, a (16): [4, 5, 6, 7, 8], b (7): [1, 4, 5]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [1, 2, 3, 4, 5, 8], b (13): [2, 3, 4, 6, 7]
+idx: 12, delta: 2, matching: false, a (14): [2, 3, 4, 6, 7], b (11): [4, 5, 6, 7, 8]
+idx: 12, delta: 3, matching: false, a (15): [1, 2, 3, 4, 5], b (10): [0, 1, 3, 6, 7, 8]
+idx: 12, delta: 4, matching: false, a (16): [4, 5, 6, 7, 8], b (9): [0, 2, 3, 6, 7]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: true, a (13): [2, 3, 4, 6, 7], b (14): [2, 3, 4, 6, 7]
+idx: 13, delta: 2, matching: false, a (15): [1, 2, 3, 4, 5], b (12): [1, 2, 3, 4, 5, 8]
+idx: 13, delta: 2 --- found smudge!
+idx: 13, delta: 3, matching: true, a (16): [4, 5, 6, 7, 8], b (11): [4, 5, 6, 7, 8]
+idx: 13 --- EXITING WITH true
+..###.##.
+.#####..#
+....#####
+##.#..###
+#.##..##.
+##.###.#.
+.#..##...
+.#..##...
+##.###.#.
+#.##..##.
+##.#..###
+....#####
+.#####..#
+..###.##.
+..###.##.
+.#####...
+....#####
+1400 (vert: 0, horiz: 14)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 8, 11, 13], b (1): [2, 7, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 7, 12], b (2): [1, 8, 10, 13]
+idx: 1, delta: 2, matching: false, a (3): [1, 4, 5, 8, 14], b (0): [1, 8, 11, 13]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 8, 10, 13], b (3): [1, 4, 5, 8, 14]
+idx: 2, delta: 2, matching: false, a (4): [1, 4, 5, 8, 14], b (1): [2, 7, 12]
+idx: 2, delta: 3, matching: false, a (5): [1, 8, 10, 13], b (0): [1, 8, 11, 13]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [1, 4, 5, 8, 14], b (4): [1, 4, 5, 8, 14]
+idx: 3, delta: 2, matching: true, a (5): [1, 8, 10, 13], b (2): [1, 8, 10, 13]
+idx: 3, delta: 3, matching: true, a (6): [2, 7, 12], b (1): [2, 7, 12]
+idx: 3, delta: 4, matching: true, a (7): [1, 8, 11, 13], b (0): [1, 8, 11, 13]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 4, 5, 8, 14], b (5): [1, 8, 10, 13]
+idx: 4, delta: 2, matching: false, a (6): [2, 7, 12], b (3): [1, 4, 5, 8, 14]
+idx: 4, delta: 3, matching: false, a (7): [1, 8, 11, 13], b (2): [1, 8, 10, 13]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 3, 6, 7, 9, 11, 12, 13], b (1): [2, 7, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 8, 10, 13], b (6): [2, 7, 12]
+idx: 5, delta: 2, matching: false, a (7): [1, 8, 11, 13], b (4): [1, 4, 5, 8, 14]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 3, 6, 7, 9, 11, 12, 13], b (3): [1, 4, 5, 8, 14]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [2, 7, 12], b (7): [1, 8, 11, 13]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 3, 6, 7, 9, 11, 12, 13], b (5): [1, 8, 10, 13]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 8, 11, 13], b (8): [0, 1, 2, 3, 6, 7, 9, 11, 12, 13]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [8], b (1): [0, 2, 3, 4, 5, 7, 8]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 3, 4, 5, 7, 8], b (2): [1, 6, 8]
+idx: 1, delta: 2, matching: true, a (3): [8], b (0): [8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 6, 8], b (3): [8]
+idx: 2, delta: 2, matching: false, a (4): [3, 4], b (1): [0, 2, 3, 4, 5, 7, 8]
+idx: 2, delta: 3, matching: false, a (5): [3, 4], b (0): [8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [8], b (4): [3, 4]
+idx: 3, delta: 2, matching: false, a (5): [3, 4], b (2): [1, 6, 8]
+idx: 3, delta: 3, matching: false, a (6): [8], b (1): [0, 2, 3, 4, 5, 7, 8]
+idx: 3, delta: 4, matching: false, a (7): [1, 6, 8], b (0): [8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: true, a (4): [3, 4], b (5): [3, 4]
+idx: 4, delta: 2, matching: true, a (6): [8], b (3): [8]
+idx: 4, delta: 3, matching: true, a (7): [1, 6, 8], b (2): [1, 6, 8]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 3, 4, 5, 7], b (1): [0, 2, 3, 4, 5, 7, 8]
+idx: 4, delta: 4 --- found smudge!
+idx: 4, delta: 5, matching: true, a (9): [8], b (0): [8]
+idx: 4 --- EXITING WITH true
+........#
+#.####.##
+.#....#.#
+........#
+...##....
+...##....
+........#
+.#....#.#
+#.####.#.
+........#
+..#..#...
+#......##
+.#....#.#
+#.#..#.##
+...##....
+500 (vert: 0, horiz: 5)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 3, 4, 5, 7, 10, 12, 13, 14, 15, 16], b (1): [1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16], b (2): [3, 5, 6, 7, 8, 9, 10, 11, 12, 14]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 6, 11, 16], b (0): [1, 2, 3, 4, 5, 7, 10, 12, 13, 14, 15, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 5, 6, 7, 8, 9, 10, 11, 12, 14], b (3): [0, 1, 6, 11, 16]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 5, 6, 11, 12, 15, 16], b (1): [1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 4, 8, 9, 13, 15, 16], b (0): [1, 2, 3, 4, 5, 7, 10, 12, 13, 14, 15, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 6, 11, 16], b (4): [1, 2, 5, 6, 11, 12, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 4, 8, 9, 13, 15, 16], b (2): [3, 5, 6, 7, 8, 9, 10, 11, 12, 14]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 3, 5, 6, 12, 14, 15], b (1): [1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16]
+idx: 3, delta: 4, matching: false, a (7): [2, 3, 5, 12, 14, 15], b (0): [1, 2, 3, 4, 5, 7, 10, 12, 13, 14, 15, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 5, 6, 11, 12, 15, 16], b (5): [0, 1, 2, 4, 8, 9, 13, 15, 16]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 3, 5, 6, 12, 14, 15], b (3): [0, 1, 6, 11, 16]
+idx: 4, delta: 3, matching: false, a (7): [2, 3, 5, 12, 14, 15], b (2): [3, 5, 6, 7, 8, 9, 10, 11, 12, 14]
+idx: 4, delta: 4, matching: false, a (8): [2, 3, 5, 12, 14, 15], b (1): [1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 4, 8, 9, 13, 15, 16], b (6): [0, 2, 3, 5, 6, 12, 14, 15]
+idx: 5, delta: 2, matching: false, a (7): [2, 3, 5, 12, 14, 15], b (4): [1, 2, 5, 6, 11, 12, 15, 16]
+idx: 5, delta: 3, matching: false, a (8): [2, 3, 5, 12, 14, 15], b (3): [0, 1, 6, 11, 16]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 2, 3, 5, 6, 12, 14, 15], b (7): [2, 3, 5, 12, 14, 15]
+idx: 6, delta: 2, matching: false, a (8): [2, 3, 5, 12, 14, 15], b (5): [0, 1, 2, 4, 8, 9, 13, 15, 16]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: true, a (7): [2, 3, 5, 12, 14, 15], b (8): [2, 3, 5, 12, 14, 15]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [3, 5, 6], b (1): [0, 1, 3, 4, 5]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 3, 4, 5], b (2): [0, 4, 5, 6, 7, 8]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 6, 7, 8], b (0): [3, 5, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 4, 5, 6, 7, 8], b (3): [0, 1, 2, 6, 7, 8]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 5], b (1): [0, 1, 3, 4, 5]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 4, 6, 7, 8], b (0): [3, 5, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 6, 7, 8], b (4): [0, 1, 5]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 4, 6, 7, 8], b (2): [0, 4, 5, 6, 7, 8]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 3, 4, 6], b (1): [0, 1, 3, 4, 5]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2], b (0): [3, 5, 6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 5], b (5): [0, 1, 2, 4, 6, 7, 8]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 3, 4, 6], b (3): [0, 1, 2, 6, 7, 8]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 2], b (2): [0, 4, 5, 6, 7, 8]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 5], b (1): [0, 1, 3, 4, 5]
+idx: 4, delta: 5, matching: false, a (9): [1, 2, 5], b (0): [3, 5, 6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 4, 6, 7, 8], b (6): [1, 2, 3, 4, 6]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2], b (4): [0, 1, 5]
+idx: 5, delta: 3, matching: false, a (8): [1, 2, 5], b (3): [0, 1, 2, 6, 7, 8]
+idx: 5, delta: 4, matching: false, a (9): [1, 2, 5], b (2): [0, 4, 5, 6, 7, 8]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 2], b (1): [0, 1, 3, 4, 5]
+idx: 5, delta: 6, matching: false, a (11): [1, 2, 3, 4], b (0): [3, 5, 6]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 3, 4, 6], b (7): [0, 1, 2]
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 5], b (5): [0, 1, 2, 4, 6, 7, 8]
+idx: 6, delta: 3, matching: false, a (9): [1, 2, 5], b (4): [0, 1, 5]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 2], b (3): [0, 1, 2, 6, 7, 8]
+idx: 6, delta: 5, matching: false, a (11): [1, 2, 3, 4], b (2): [0, 4, 5, 6, 7, 8]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 2, 4, 6, 7, 8], b (1): [0, 1, 3, 4, 5]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 5], b (0): [3, 5, 6]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 2], b (8): [1, 2, 5]
+idx: 7, delta: 2, matching: false, a (9): [1, 2, 5], b (6): [1, 2, 3, 4, 6]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 2], b (5): [0, 1, 2, 4, 6, 7, 8]
+idx: 7, delta: 4, matching: false, a (11): [1, 2, 3, 4], b (4): [0, 1, 5]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 2, 4, 6, 7, 8], b (3): [0, 1, 2, 6, 7, 8]
+idx: 7, delta: 5 --- found smudge!
+idx: 7, delta: 6, matching: false, a (13): [0, 1, 5], b (2): [0, 4, 5, 6, 7, 8]
+idx: 7, delta: 6 --- found smudge twice!
+idx: 8, delta: 0, matching: true, a (8): [1, 2, 5], b (9): [1, 2, 5]
+idx: 8, delta: 2, matching: true, a (10): [0, 1, 2], b (7): [0, 1, 2]
+idx: 8, delta: 3, matching: false, a (11): [1, 2, 3, 4], b (6): [1, 2, 3, 4, 6]
+idx: 8, delta: 3 --- found smudge!
+idx: 8, delta: 4, matching: true, a (12): [0, 1, 2, 4, 6, 7, 8], b (5): [0, 1, 2, 4, 6, 7, 8]
+idx: 8, delta: 5, matching: true, a (13): [0, 1, 5], b (4): [0, 1, 5]
+idx: 8, delta: 6, matching: true, a (14): [0, 1, 2, 6, 7, 8], b (3): [0, 1, 2, 6, 7, 8]
+idx: 8, delta: 7, matching: true, a (15): [0, 4, 5, 6, 7, 8], b (2): [0, 4, 5, 6, 7, 8]
+idx: 8, delta: 8, matching: true, a (16): [0, 1, 3, 4, 5], b (1): [0, 1, 3, 4, 5]
+idx: 8 --- EXITING WITH true
+...#.##..
+##.###...
+#...#####
+###...###
+##...#...
+###.#.###
+.####.#..
+###......
+.##..#...
+.##..#...
+###......
+.####....
+###.#.###
+##...#...
+###...###
+#...#####
+##.###...
+900 (vert: 0, horiz: 9)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 5, 8], b (1): [3, 4, 8]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [3, 4, 8], b (2): [4, 5, 6, 7]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 4, 6], b (0): [0, 1, 2, 5, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [4, 5, 6, 7], b (3): [0, 1, 4, 6]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 4, 5, 6, 7, 8], b (1): [3, 4, 8]
+idx: 2, delta: 3, matching: false, a (5): [1, 5, 6, 8], b (0): [0, 1, 2, 5, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 4, 6], b (4): [1, 2, 3, 4, 5, 6, 7, 8]
+idx: 3, delta: 2, matching: false, a (5): [1, 5, 6, 8], b (2): [4, 5, 6, 7]
+idx: 3, delta: 3, matching: false, a (6): [1, 5, 6, 8], b (1): [3, 4, 8]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 3, 4, 5, 6, 7, 8], b (0): [0, 1, 2, 5, 8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 4, 5, 6, 7, 8], b (5): [1, 5, 6, 8]
+idx: 4, delta: 2, matching: false, a (6): [1, 5, 6, 8], b (3): [0, 1, 4, 6]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 3, 4, 5, 6, 7, 8], b (2): [4, 5, 6, 7]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 4, 6], b (1): [3, 4, 8]
+idx: 4, delta: 5, matching: false, a (9): [4, 6, 7], b (0): [0, 1, 2, 5, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: true, a (5): [1, 5, 6, 8], b (6): [1, 5, 6, 8]
+idx: 5, delta: 2, matching: true, a (7): [1, 2, 3, 4, 5, 6, 7, 8], b (4): [1, 2, 3, 4, 5, 6, 7, 8]
+idx: 5, delta: 3, matching: true, a (8): [0, 1, 4, 6], b (3): [0, 1, 4, 6]
+idx: 5, delta: 4, matching: false, a (9): [4, 6, 7], b (2): [4, 5, 6, 7]
+idx: 5, delta: 4 --- found smudge!
+idx: 5, delta: 5, matching: true, a (10): [3, 4, 8], b (1): [3, 4, 8]
+idx: 5, delta: 6, matching: true, a (11): [0, 1, 2, 5, 8], b (0): [0, 1, 2, 5, 8]
+idx: 5 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 3, 8, 11, 12, 14, 15], b (1): [0, 3, 4, 5, 6, 7, 8, 11, 12, 14, 15]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 3, 4, 5, 6, 7, 8, 11, 12, 14, 15], b (2): [0, 4, 7, 11]
+idx: 1, delta: 2, matching: false, a (3): [1, 4, 7, 10, 12, 13, 16], b (0): [0, 3, 8, 11, 12, 14, 15]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 4, 7, 11], b (3): [1, 4, 7, 10, 12, 13, 16]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 4, 7, 8, 9, 10, 12, 13, 16], b (1): [0, 3, 4, 5, 6, 7, 8, 11, 12, 14, 15]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 4, 5, 6, 7, 11, 12, 13, 14, 15, 16], b (0): [0, 3, 8, 11, 12, 14, 15]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 4, 7, 10, 12, 13, 16], b (4): [1, 2, 3, 4, 7, 8, 9, 10, 12, 13, 16]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 4, 5, 6, 7, 11, 12, 13, 14, 15, 16], b (2): [0, 4, 7, 11]
+idx: 3, delta: 3, matching: false, a (6): [2, 3, 4, 5, 6, 7, 8, 9, 14, 15], b (1): [0, 3, 4, 5, 6, 7, 8, 11, 12, 14, 15]
+idx: 3, delta: 4, matching: false, a (7): [2, 4, 7, 9, 12], b (0): [0, 3, 8, 11, 12, 14, 15]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 4, 7, 8, 9, 10, 12, 13, 16], b (5): [0, 2, 4, 5, 6, 7, 11, 12, 13, 14, 15, 16]
+idx: 4, delta: 2, matching: false, a (6): [2, 3, 4, 5, 6, 7, 8, 9, 14, 15], b (3): [1, 4, 7, 10, 12, 13, 16]
+idx: 4, delta: 3, matching: false, a (7): [2, 4, 7, 9, 12], b (2): [0, 4, 7, 11]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 4, 5, 6, 7, 10, 11, 12, 14, 15], b (1): [0, 3, 4, 5, 6, 7, 8, 11, 12, 14, 15]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 4, 5, 6, 7, 11, 12, 13, 14, 15, 16], b (6): [2, 3, 4, 5, 6, 7, 8, 9, 14, 15]
+idx: 5, delta: 2, matching: false, a (7): [2, 4, 7, 9, 12], b (4): [1, 2, 3, 4, 7, 8, 9, 10, 12, 13, 16]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 4, 5, 6, 7, 10, 11, 12, 14, 15], b (3): [1, 4, 7, 10, 12, 13, 16]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [2, 3, 4, 5, 6, 7, 8, 9, 14, 15], b (7): [2, 4, 7, 9, 12]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 4, 5, 6, 7, 10, 11, 12, 14, 15], b (5): [0, 2, 4, 5, 6, 7, 11, 12, 13, 14, 15, 16]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [2, 4, 7, 9, 12], b (8): [0, 1, 4, 5, 6, 7, 10, 11, 12, 14, 15]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+#..#....#..##.##.
+#..######..##.##.
+#...#..#...#.....
+.#..#..#..#.##..#
+.####..####.##..#
+#.#.####...######
+..########....##.
+..#.#..#.#..#....
+##..####..###.##.
+6 (vert: 6, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 4, 5, 6, 8, 9], b (1): [0, 4, 5, 7, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 4, 5, 7, 9], b (2): [0, 2, 3, 4, 6, 7, 9, 10]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 3, 4, 6, 7, 9, 10], b (0): [1, 2, 4, 5, 6, 8, 9]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: true, a (2): [0, 2, 3, 4, 6, 7, 9, 10], b (3): [0, 2, 3, 4, 6, 7, 9, 10]
+idx: 2, delta: 2, matching: true, a (4): [0, 4, 5, 7, 9], b (1): [0, 4, 5, 7, 9]
+idx: 2, delta: 3, matching: true, a (5): [1, 2, 4, 5, 6, 8, 9], b (0): [1, 2, 4, 5, 6, 8, 9]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 3, 4, 6, 7, 9, 10], b (4): [0, 4, 5, 7, 9]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 4, 5, 6, 8, 9], b (2): [0, 2, 3, 4, 6, 7, 9, 10]
+idx: 3, delta: 3, matching: false, a (6): [0, 3, 6, 7, 8], b (1): [0, 4, 5, 7, 9]
+idx: 3, delta: 4, matching: false, a (7): [0, 3, 4, 5, 6, 8], b (0): [1, 2, 4, 5, 6, 8, 9]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 4, 5, 7, 9], b (5): [1, 2, 4, 5, 6, 8, 9]
+idx: 4, delta: 2, matching: false, a (6): [0, 3, 6, 7, 8], b (3): [0, 2, 3, 4, 6, 7, 9, 10]
+idx: 4, delta: 3, matching: false, a (7): [0, 3, 4, 5, 6, 8], b (2): [0, 2, 3, 4, 6, 7, 9, 10]
+idx: 4, delta: 4, matching: false, a (8): [0, 3, 5, 6, 8], b (1): [0, 4, 5, 7, 9]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 4, 5, 6, 8, 9], b (6): [0, 3, 6, 7, 8]
+idx: 5, delta: 2, matching: false, a (7): [0, 3, 4, 5, 6, 8], b (4): [0, 4, 5, 7, 9]
+idx: 5, delta: 3, matching: false, a (8): [0, 3, 5, 6, 8], b (3): [0, 2, 3, 4, 6, 7, 9, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 3, 6, 7, 8], b (7): [0, 3, 4, 5, 6, 8]
+idx: 6, delta: 2, matching: false, a (8): [0, 3, 5, 6, 8], b (5): [1, 2, 4, 5, 6, 8, 9]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 3, 4, 5, 6, 8], b (8): [0, 3, 5, 6, 8]
+idx: 7, delta: 0 --- found smudge!
+idx: 7 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 3, 4, 6, 7, 8], b (1): [0, 5]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 5], b (2): [0, 2, 3, 5]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 6, 7, 8], b (0): [1, 2, 3, 4, 6, 7, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 3, 5], b (3): [2, 3, 6, 7, 8]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 3, 4, 5, 7], b (1): [0, 5]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 4, 5, 7, 8], b (0): [1, 2, 3, 4, 6, 7, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 3, 6, 7, 8], b (4): [0, 1, 2, 3, 4, 5, 7]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 4, 5, 7, 8], b (2): [0, 2, 3, 5]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 3, 5, 6, 7, 8], b (1): [0, 5]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 3, 4, 6], b (0): [1, 2, 3, 4, 6, 7, 8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 3, 4, 5, 7], b (5): [0, 1, 4, 5, 7, 8]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 3, 5, 6, 7, 8], b (3): [2, 3, 6, 7, 8]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 3, 4, 6], b (2): [0, 2, 3, 5]
+idx: 4, delta: 4, matching: false, a (8): [0, 5, 6, 7, 8], b (1): [0, 5]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 3, 4, 5], b (0): [1, 2, 3, 4, 6, 7, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 4, 5, 7, 8], b (6): [0, 2, 3, 5, 6, 7, 8]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 3, 4, 6], b (4): [0, 1, 2, 3, 4, 5, 7]
+idx: 5, delta: 3, matching: false, a (8): [0, 5, 6, 7, 8], b (3): [2, 3, 6, 7, 8]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 3, 4, 5], b (2): [0, 2, 3, 5]
+idx: 5, delta: 5, matching: false, a (10): [2, 3], b (1): [0, 5]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 2, 3, 5, 6, 7, 8], b (7): [1, 2, 3, 4, 6]
+idx: 6, delta: 2, matching: false, a (8): [0, 5, 6, 7, 8], b (5): [0, 1, 4, 5, 7, 8]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 3, 4, 5], b (4): [0, 1, 2, 3, 4, 5, 7]
+idx: 6, delta: 3 --- found smudge!
+idx: 6, delta: 4, matching: false, a (10): [2, 3], b (3): [2, 3, 6, 7, 8]
+idx: 6, delta: 4 --- found smudge twice!
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 3, 4, 6], b (8): [0, 5, 6, 7, 8]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 2, 3, 4, 5], b (6): [0, 2, 3, 5, 6, 7, 8]
+idx: 7, delta: 3, matching: false, a (10): [2, 3], b (5): [0, 1, 4, 5, 7, 8]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 5, 6, 7, 8], b (9): [0, 1, 2, 3, 4, 5]
+idx: 8, delta: 2, matching: false, a (10): [2, 3], b (7): [1, 2, 3, 4, 6]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 2, 3, 4, 5], b (10): [2, 3]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+.####.###
+#....#...
+#.##.#...
+..##..###
+######.#.
+##..##.##
+#.##.####
+.####.#..
+#....####
+######...
+..##.....
+8 (vert: 8, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [3, 4, 6, 8, 9, 10, 11], b (1): [1, 3, 5, 6, 11, 12, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 3, 5, 6, 11, 12, 14], b (2): [1, 3, 5, 11, 12, 14]
+idx: 1, delta: 0 --- found smudge!
+idx: 1, delta: 2, matching: true, a (3): [3, 4, 6, 8, 9, 10, 11], b (0): [3, 4, 6, 8, 9, 10, 11]
+idx: 1 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [6, 9], b (1): [1, 2, 6, 7, 8, 9, 11, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 6, 7, 8, 9, 11, 12], b (2): [5, 7, 10, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 5, 7, 8, 9, 11], b (0): [6, 9]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [5, 7, 10, 11, 12], b (3): [0, 1, 2, 3, 5, 7, 8, 9, 11]
+idx: 2, delta: 2, matching: false, a (4): [0, 3, 4, 5, 6, 9, 11, 12], b (1): [1, 2, 6, 7, 8, 9, 11, 12]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 4, 7], b (0): [6, 9]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 3, 5, 7, 8, 9, 11], b (4): [0, 3, 4, 5, 6, 9, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 4, 7], b (2): [5, 7, 10, 11, 12]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 3, 5, 6, 7, 10, 11, 12], b (1): [1, 2, 6, 7, 8, 9, 11, 12]
+idx: 3, delta: 4, matching: false, a (7): [5, 9, 10, 12], b (0): [6, 9]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 3, 4, 5, 6, 9, 11, 12], b (5): [1, 2, 4, 7]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 3, 5, 6, 7, 10, 11, 12], b (3): [0, 1, 2, 3, 5, 7, 8, 9, 11]
+idx: 4, delta: 3, matching: false, a (7): [5, 9, 10, 12], b (2): [5, 7, 10, 11, 12]
+idx: 4, delta: 4, matching: false, a (8): [0, 3, 5, 6, 8, 9, 10, 12], b (1): [1, 2, 6, 7, 8, 9, 11, 12]
+idx: 4, delta: 5, matching: false, a (9): [0, 3, 4, 5, 7, 10], b (0): [6, 9]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 4, 7], b (6): [0, 1, 3, 5, 6, 7, 10, 11, 12]
+idx: 5, delta: 2, matching: false, a (7): [5, 9, 10, 12], b (4): [0, 3, 4, 5, 6, 9, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [0, 3, 5, 6, 8, 9, 10, 12], b (3): [0, 1, 2, 3, 5, 7, 8, 9, 11]
+idx: 5, delta: 4, matching: false, a (9): [0, 3, 4, 5, 7, 10], b (2): [5, 7, 10, 11, 12]
+idx: 5, delta: 5, matching: false, a (10): [0, 3, 4, 6, 8, 9, 10, 11], b (1): [1, 2, 6, 7, 8, 9, 11, 12]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2, 3, 5, 8, 11], b (0): [6, 9]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 3, 5, 6, 7, 10, 11, 12], b (7): [5, 9, 10, 12]
+idx: 6, delta: 2, matching: false, a (8): [0, 3, 5, 6, 8, 9, 10, 12], b (5): [1, 2, 4, 7]
+idx: 6, delta: 3, matching: false, a (9): [0, 3, 4, 5, 7, 10], b (4): [0, 3, 4, 5, 6, 9, 11, 12]
+idx: 6, delta: 4, matching: false, a (10): [0, 3, 4, 6, 8, 9, 10, 11], b (3): [0, 1, 2, 3, 5, 7, 8, 9, 11]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 2, 3, 5, 8, 11], b (2): [5, 7, 10, 11, 12]
+idx: 6, delta: 6, matching: false, a (12): [1, 2, 5, 9, 10, 11], b (1): [1, 2, 6, 7, 8, 9, 11, 12]
+idx: 6, delta: 7, matching: false, a (13): [4, 5, 7, 8, 12], b (0): [6, 9]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [5, 9, 10, 12], b (8): [0, 3, 5, 6, 8, 9, 10, 12]
+idx: 7, delta: 2, matching: false, a (9): [0, 3, 4, 5, 7, 10], b (6): [0, 1, 3, 5, 6, 7, 10, 11, 12]
+idx: 7, delta: 3, matching: false, a (10): [0, 3, 4, 6, 8, 9, 10, 11], b (5): [1, 2, 4, 7]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 2, 3, 5, 8, 11], b (4): [0, 3, 4, 5, 6, 9, 11, 12]
+idx: 7, delta: 5, matching: false, a (12): [1, 2, 5, 9, 10, 11], b (3): [0, 1, 2, 3, 5, 7, 8, 9, 11]
+idx: 7, delta: 6, matching: false, a (13): [4, 5, 7, 8, 12], b (2): [5, 7, 10, 11, 12]
+idx: 7, delta: 7, matching: false, a (14): [1, 2, 7, 8, 11], b (1): [1, 2, 6, 7, 8, 9, 11, 12]
+idx: 7, delta: 8, matching: false, a (15): [4, 6, 7], b (0): [6, 9]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 3, 5, 6, 8, 9, 10, 12], b (9): [0, 3, 4, 5, 7, 10]
+idx: 8, delta: 2, matching: false, a (10): [0, 3, 4, 6, 8, 9, 10, 11], b (7): [5, 9, 10, 12]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 2, 3, 5, 8, 11], b (6): [0, 1, 3, 5, 6, 7, 10, 11, 12]
+idx: 8, delta: 4, matching: false, a (12): [1, 2, 5, 9, 10, 11], b (5): [1, 2, 4, 7]
+idx: 8, delta: 5, matching: false, a (13): [4, 5, 7, 8, 12], b (4): [0, 3, 4, 5, 6, 9, 11, 12]
+idx: 8, delta: 6, matching: false, a (14): [1, 2, 7, 8, 11], b (3): [0, 1, 2, 3, 5, 7, 8, 9, 11]
+idx: 8, delta: 7, matching: false, a (15): [4, 6, 7], b (2): [5, 7, 10, 11, 12]
+idx: 8, delta: 8, matching: false, a (16): [4, 6, 7], b (1): [1, 2, 6, 7, 8, 9, 11, 12]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 3, 4, 5, 7, 10], b (10): [0, 3, 4, 6, 8, 9, 10, 11]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 2, 3, 5, 8, 11], b (8): [0, 3, 5, 6, 8, 9, 10, 12]
+idx: 9, delta: 3, matching: false, a (12): [1, 2, 5, 9, 10, 11], b (7): [5, 9, 10, 12]
+idx: 9, delta: 4, matching: false, a (13): [4, 5, 7, 8, 12], b (6): [0, 1, 3, 5, 6, 7, 10, 11, 12]
+idx: 9, delta: 5, matching: false, a (14): [1, 2, 7, 8, 11], b (5): [1, 2, 4, 7]
+idx: 9, delta: 6, matching: false, a (15): [4, 6, 7], b (4): [0, 3, 4, 5, 6, 9, 11, 12]
+idx: 9, delta: 7, matching: false, a (16): [4, 6, 7], b (3): [0, 1, 2, 3, 5, 7, 8, 9, 11]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 3, 4, 6, 8, 9, 10, 11], b (11): [0, 1, 2, 3, 5, 8, 11]
+idx: 10, delta: 2, matching: false, a (12): [1, 2, 5, 9, 10, 11], b (9): [0, 3, 4, 5, 7, 10]
+idx: 10, delta: 3, matching: false, a (13): [4, 5, 7, 8, 12], b (8): [0, 3, 5, 6, 8, 9, 10, 12]
+idx: 10, delta: 4, matching: false, a (14): [1, 2, 7, 8, 11], b (7): [5, 9, 10, 12]
+idx: 10, delta: 5, matching: false, a (15): [4, 6, 7], b (6): [0, 1, 3, 5, 6, 7, 10, 11, 12]
+idx: 10, delta: 6, matching: false, a (16): [4, 6, 7], b (5): [1, 2, 4, 7]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 2, 3, 5, 8, 11], b (12): [1, 2, 5, 9, 10, 11]
+idx: 11, delta: 2, matching: false, a (13): [4, 5, 7, 8, 12], b (10): [0, 3, 4, 6, 8, 9, 10, 11]
+idx: 11, delta: 3, matching: false, a (14): [1, 2, 7, 8, 11], b (9): [0, 3, 4, 5, 7, 10]
+idx: 11, delta: 4, matching: false, a (15): [4, 6, 7], b (8): [0, 3, 5, 6, 8, 9, 10, 12]
+idx: 11, delta: 5, matching: false, a (16): [4, 6, 7], b (7): [5, 9, 10, 12]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [1, 2, 5, 9, 10, 11], b (13): [4, 5, 7, 8, 12]
+idx: 12, delta: 2, matching: false, a (14): [1, 2, 7, 8, 11], b (11): [0, 1, 2, 3, 5, 8, 11]
+idx: 12, delta: 3, matching: false, a (15): [4, 6, 7], b (10): [0, 3, 4, 6, 8, 9, 10, 11]
+idx: 12, delta: 4, matching: false, a (16): [4, 6, 7], b (9): [0, 3, 4, 5, 7, 10]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [4, 5, 7, 8, 12], b (14): [1, 2, 7, 8, 11]
+idx: 13, delta: 2, matching: false, a (15): [4, 6, 7], b (12): [1, 2, 5, 9, 10, 11]
+idx: 13, delta: 3, matching: false, a (16): [4, 6, 7], b (11): [0, 1, 2, 3, 5, 8, 11]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [1, 2, 7, 8, 11], b (15): [4, 6, 7]
+idx: 14, delta: 2, matching: false, a (16): [4, 6, 7], b (13): [4, 5, 7, 8, 12]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: true, a (15): [4, 6, 7], b (16): [4, 6, 7]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+......#..#...
+.##...####.##
+.....#.#..###
+####.#.###.#.
+#..####..#.##
+.##.#..#.....
+##.#.###..###
+.....#...##.#
+#..#.##.###.#
+#..###.#..#..
+#..##.#.####.
+####.#..#..#.
+.##..#...###.
+....##.##...#
+.##....##..#.
+....#.##.....
+....#.##.....
+2 (vert: 2, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 5], b (1): [0, 1, 2, 4]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 4], b (2): [4, 6]
+idx: 1, delta: 2, matching: false, a (3): [4, 6], b (0): [0, 1, 3, 5]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: true, a (2): [4, 6], b (3): [4, 6]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 4, 6], b (1): [0, 1, 2, 4]
+idx: 2, delta: 2 --- found smudge!
+idx: 2, delta: 3, matching: true, a (5): [0, 1, 3, 5], b (0): [0, 1, 3, 5]
+idx: 2 --- EXITING WITH true
+idx: 0, delta: 0, matching: true, a (0): [0, 1, 4, 5], b (1): [0, 1, 4, 5]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 4, 5], b (2): [1, 4]
+idx: 1, delta: 2, matching: false, a (3): [0, 5], b (0): [0, 1, 4, 5]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 4], b (3): [0, 5]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 4, 6], b (1): [0, 1, 4, 5]
+idx: 2, delta: 3, matching: false, a (5): [0, 5], b (0): [0, 1, 4, 5]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 5], b (4): [1, 2, 3, 4, 6]
+idx: 3, delta: 2, matching: false, a (5): [0, 5], b (2): [1, 4]
+idx: 3, delta: 3, matching: false, a (6): [2, 3, 4], b (1): [0, 1, 4, 5]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 4, 6], b (5): [0, 5]
+idx: 4, delta: 2, matching: false, a (6): [2, 3, 4], b (3): [0, 5]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 5], b (6): [2, 3, 4]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+##..##.
+##..##.
+.#..#..
+#....#.
+.####.#
+#....#.
+..###..
+3 (vert: 3, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 4, 6, 9, 11, 12], b (1): [0, 1, 2, 4, 5, 6, 9, 10, 11]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 4, 5, 6, 9, 10, 11], b (2): [0, 1, 2, 4, 5, 7, 8, 10, 11]
+idx: 1, delta: 2, matching: false, a (3): [3, 4, 11, 12], b (0): [0, 1, 3, 4, 6, 9, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 4, 5, 7, 8, 10, 11], b (3): [3, 4, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [2, 7, 8, 9], b (1): [0, 1, 2, 4, 5, 6, 9, 10, 11]
+idx: 2, delta: 3, matching: false, a (5): [3, 5, 6, 7, 8, 9, 10, 12], b (0): [0, 1, 3, 4, 6, 9, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [3, 4, 11, 12], b (4): [2, 7, 8, 9]
+idx: 3, delta: 2, matching: false, a (5): [3, 5, 6, 7, 8, 9, 10, 12], b (2): [0, 1, 2, 4, 5, 7, 8, 10, 11]
+idx: 3, delta: 3, matching: false, a (6): [4, 5, 6, 7, 8, 9, 10, 11], b (1): [0, 1, 2, 4, 5, 6, 9, 10, 11]
+idx: 3, delta: 4, matching: false, a (7): [2, 3, 6, 9, 12], b (0): [0, 1, 3, 4, 6, 9, 11, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 7, 8, 9], b (5): [3, 5, 6, 7, 8, 9, 10, 12]
+idx: 4, delta: 2, matching: false, a (6): [4, 5, 6, 7, 8, 9, 10, 11], b (3): [3, 4, 11, 12]
+idx: 4, delta: 3, matching: false, a (7): [2, 3, 6, 9, 12], b (2): [0, 1, 2, 4, 5, 7, 8, 10, 11]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 3, 7, 8, 12], b (1): [0, 1, 2, 4, 5, 6, 9, 10, 11]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [3, 5, 6, 7, 8, 9, 10, 12], b (6): [4, 5, 6, 7, 8, 9, 10, 11]
+idx: 5, delta: 2, matching: false, a (7): [2, 3, 6, 9, 12], b (4): [2, 7, 8, 9]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 3, 7, 8, 12], b (3): [3, 4, 11, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [4, 5, 6, 7, 8, 9, 10, 11], b (7): [2, 3, 6, 9, 12]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 3, 7, 8, 12], b (5): [3, 5, 6, 7, 8, 9, 10, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [2, 3, 6, 9, 12], b (8): [0, 1, 2, 3, 7, 8, 12]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+idx: 0, delta: 0, matching: true, a (0): [0, 1, 2, 8], b (1): [0, 1, 2, 8]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 8], b (2): [1, 2, 4, 7, 8]
+idx: 1, delta: 2, matching: false, a (3): [0, 3, 5, 7, 8], b (0): [0, 1, 2, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 2, 4, 7, 8], b (3): [0, 3, 5, 7, 8]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 3, 6], b (1): [0, 1, 2, 8]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 5, 6], b (0): [0, 1, 2, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 3, 5, 7, 8], b (4): [0, 1, 2, 3, 6]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 5, 6], b (2): [1, 2, 4, 7, 8]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 5, 6, 7], b (1): [0, 1, 2, 8]
+idx: 3, delta: 4, matching: false, a (7): [2, 4, 5, 6, 8], b (0): [0, 1, 2, 8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 3, 6], b (5): [1, 2, 5, 6]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 5, 6, 7], b (3): [0, 3, 5, 7, 8]
+idx: 4, delta: 3, matching: false, a (7): [2, 4, 5, 6, 8], b (2): [1, 2, 4, 7, 8]
+idx: 4, delta: 4, matching: false, a (8): [2, 4, 5, 6, 8], b (1): [0, 1, 2, 8]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 4, 5, 6, 7], b (0): [0, 1, 2, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 5, 6], b (6): [0, 1, 5, 6, 7]
+idx: 5, delta: 2, matching: false, a (7): [2, 4, 5, 6, 8], b (4): [0, 1, 2, 3, 6]
+idx: 5, delta: 3, matching: false, a (8): [2, 4, 5, 6, 8], b (3): [0, 3, 5, 7, 8]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 4, 5, 6, 7], b (2): [1, 2, 4, 7, 8]
+idx: 5, delta: 5, matching: false, a (10): [1, 2, 5, 6], b (1): [0, 1, 2, 8]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2, 3, 6], b (0): [0, 1, 2, 8]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 5, 6, 7], b (7): [2, 4, 5, 6, 8]
+idx: 6, delta: 2, matching: false, a (8): [2, 4, 5, 6, 8], b (5): [1, 2, 5, 6]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 4, 5, 6, 7], b (4): [0, 1, 2, 3, 6]
+idx: 6, delta: 4, matching: false, a (10): [1, 2, 5, 6], b (3): [0, 3, 5, 7, 8]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 2, 3, 6], b (2): [1, 2, 4, 7, 8]
+idx: 6, delta: 6, matching: false, a (12): [0, 3, 5, 7, 8], b (1): [0, 1, 2, 8]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: true, a (7): [2, 4, 5, 6, 8], b (8): [2, 4, 5, 6, 8]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 4, 5, 6, 7], b (6): [0, 1, 5, 6, 7]
+idx: 7, delta: 2 --- found smudge!
+idx: 7, delta: 3, matching: true, a (10): [1, 2, 5, 6], b (5): [1, 2, 5, 6]
+idx: 7, delta: 4, matching: true, a (11): [0, 1, 2, 3, 6], b (4): [0, 1, 2, 3, 6]
+idx: 7, delta: 5, matching: true, a (12): [0, 3, 5, 7, 8], b (3): [0, 3, 5, 7, 8]
+idx: 7 --- EXITING WITH true
+###.....#
+###.....#
+.##.#..##
+#..#.#.##
+####..#..
+.##..##..
+##...###.
+..#.###.#
+..#.###.#
+##..####.
+.##..##..
+####..#..
+#..#.#.##
+800 (vert: 0, horiz: 8)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 3, 4, 7, 8], b (1): [4, 5, 6, 7, 8]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [4, 5, 6, 7, 8], b (2): [0, 3, 4, 5, 7]
+idx: 1, delta: 2, matching: false, a (3): [4, 5, 6, 7, 8], b (0): [0, 1, 2, 3, 4, 7, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 4, 5, 7], b (3): [4, 5, 6, 7, 8]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 4, 5, 6, 7, 8], b (1): [4, 5, 6, 7, 8]
+idx: 2, delta: 3, matching: false, a (5): [4, 5, 8], b (0): [0, 1, 2, 3, 4, 7, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [4, 5, 6, 7, 8], b (4): [1, 2, 4, 5, 6, 7, 8]
+idx: 3, delta: 2, matching: false, a (5): [4, 5, 8], b (2): [0, 3, 4, 5, 7]
+idx: 3, delta: 3, matching: false, a (6): [4, 5, 6, 8], b (1): [4, 5, 6, 7, 8]
+idx: 3, delta: 3 --- found smudge!
+idx: 3, delta: 4, matching: false, a (7): [0, 3, 5, 6], b (0): [0, 1, 2, 3, 4, 7, 8]
+idx: 3, delta: 4 --- found smudge twice!
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 4, 5, 6, 7, 8], b (5): [4, 5, 8]
+idx: 4, delta: 2, matching: false, a (6): [4, 5, 6, 8], b (3): [4, 5, 6, 7, 8]
+idx: 4, delta: 2 --- found smudge!
+idx: 4, delta: 3, matching: false, a (7): [0, 3, 5, 6], b (2): [0, 3, 4, 5, 7]
+idx: 4, delta: 3 --- found smudge twice!
+idx: 5, delta: 0, matching: false, a (5): [4, 5, 8], b (6): [4, 5, 6, 8]
+idx: 5, delta: 0 --- found smudge!
+idx: 5, delta: 2, matching: false, a (7): [0, 3, 5, 6], b (4): [1, 2, 4, 5, 6, 7, 8]
+idx: 5, delta: 2 --- found smudge twice!
+idx: 6, delta: 0, matching: false, a (6): [4, 5, 6, 8], b (7): [0, 3, 5, 6]
+idx: 6, delta: 2, matching: false, a (8): [6, 7], b (5): [4, 5, 8]
+idx: 6, delta: 3, matching: false, a (9): [0, 3, 4, 5, 6, 7], b (4): [1, 2, 4, 5, 6, 7, 8]
+idx: 6, delta: 4, matching: false, a (10): [1, 2, 5, 8], b (3): [4, 5, 6, 7, 8]
+idx: 6, delta: 5, matching: false, a (11): [1, 2, 6, 8], b (2): [0, 3, 4, 5, 7]
+idx: 6, delta: 6, matching: false, a (12): [6], b (1): [4, 5, 6, 7, 8]
+idx: 6, delta: 7, matching: false, a (13): [1, 2, 5], b (0): [0, 1, 2, 3, 4, 7, 8]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 3, 5, 6], b (8): [6, 7]
+idx: 7, delta: 2, matching: false, a (9): [0, 3, 4, 5, 6, 7], b (6): [4, 5, 6, 8]
+idx: 7, delta: 3, matching: false, a (10): [1, 2, 5, 8], b (5): [4, 5, 8]
+idx: 7, delta: 4, matching: false, a (11): [1, 2, 6, 8], b (4): [1, 2, 4, 5, 6, 7, 8]
+idx: 7, delta: 5, matching: false, a (12): [6], b (3): [4, 5, 6, 7, 8]
+idx: 7, delta: 6, matching: false, a (13): [1, 2, 5], b (2): [0, 3, 4, 5, 7]
+idx: 7, delta: 7, matching: false, a (14): [1, 2, 5], b (1): [4, 5, 6, 7, 8]
+idx: 7, delta: 8, matching: false, a (15): [6], b (0): [0, 1, 2, 3, 4, 7, 8]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [6, 7], b (9): [0, 3, 4, 5, 6, 7]
+idx: 8, delta: 2, matching: false, a (10): [1, 2, 5, 8], b (7): [0, 3, 5, 6]
+idx: 8, delta: 3, matching: false, a (11): [1, 2, 6, 8], b (6): [4, 5, 6, 8]
+idx: 8, delta: 4, matching: false, a (12): [6], b (5): [4, 5, 8]
+idx: 8, delta: 5, matching: false, a (13): [1, 2, 5], b (4): [1, 2, 4, 5, 6, 7, 8]
+idx: 8, delta: 6, matching: false, a (14): [1, 2, 5], b (3): [4, 5, 6, 7, 8]
+idx: 8, delta: 7, matching: false, a (15): [6], b (2): [0, 3, 4, 5, 7]
+idx: 8, delta: 8, matching: false, a (16): [6, 8], b (1): [4, 5, 6, 7, 8]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 3, 4, 5, 6, 7], b (10): [1, 2, 5, 8]
+idx: 9, delta: 2, matching: false, a (11): [1, 2, 6, 8], b (8): [6, 7]
+idx: 9, delta: 3, matching: false, a (12): [6], b (7): [0, 3, 5, 6]
+idx: 9, delta: 4, matching: false, a (13): [1, 2, 5], b (6): [4, 5, 6, 8]
+idx: 9, delta: 5, matching: false, a (14): [1, 2, 5], b (5): [4, 5, 8]
+idx: 9, delta: 6, matching: false, a (15): [6], b (4): [1, 2, 4, 5, 6, 7, 8]
+idx: 9, delta: 7, matching: false, a (16): [6, 8], b (3): [4, 5, 6, 7, 8]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [1, 2, 5, 8], b (11): [1, 2, 6, 8]
+idx: 10, delta: 2, matching: false, a (12): [6], b (9): [0, 3, 4, 5, 6, 7]
+idx: 10, delta: 3, matching: false, a (13): [1, 2, 5], b (8): [6, 7]
+idx: 10, delta: 4, matching: false, a (14): [1, 2, 5], b (7): [0, 3, 5, 6]
+idx: 10, delta: 5, matching: false, a (15): [6], b (6): [4, 5, 6, 8]
+idx: 10, delta: 6, matching: false, a (16): [6, 8], b (5): [4, 5, 8]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [1, 2, 6, 8], b (12): [6]
+idx: 11, delta: 2, matching: false, a (13): [1, 2, 5], b (10): [1, 2, 5, 8]
+idx: 11, delta: 2 --- found smudge!
+idx: 11, delta: 3, matching: false, a (14): [1, 2, 5], b (9): [0, 3, 4, 5, 6, 7]
+idx: 11, delta: 3 --- found smudge twice!
+idx: 12, delta: 0, matching: false, a (12): [6], b (13): [1, 2, 5]
+idx: 12, delta: 2, matching: false, a (14): [1, 2, 5], b (11): [1, 2, 6, 8]
+idx: 12, delta: 3, matching: false, a (15): [6], b (10): [1, 2, 5, 8]
+idx: 12, delta: 4, matching: false, a (16): [6, 8], b (9): [0, 3, 4, 5, 6, 7]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: true, a (13): [1, 2, 5], b (14): [1, 2, 5]
+idx: 13, delta: 2, matching: true, a (15): [6], b (12): [6]
+idx: 13, delta: 3, matching: false, a (16): [6, 8], b (11): [1, 2, 6, 8]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [1, 2, 5], b (15): [6]
+idx: 14, delta: 2, matching: false, a (16): [6, 8], b (13): [1, 2, 5]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: false, a (15): [6], b (16): [6, 8]
+idx: 15, delta: 0 --- found smudge!
+idx: 15 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 7, 9], b (1): [0, 4, 10, 11, 13, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: true, a (1): [0, 4, 10, 11, 13, 14], b (2): [0, 4, 10, 11, 13, 14]
+idx: 1, delta: 2, matching: true, a (3): [0, 2, 7, 9], b (0): [0, 2, 7, 9]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 4, 10, 11, 13, 14], b (3): [0, 2, 7, 9]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 3, 4, 5, 6, 9], b (1): [0, 4, 10, 11, 13, 14]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 3, 4, 5, 6, 7, 9, 10, 13, 14], b (0): [0, 2, 7, 9]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 7, 9], b (4): [0, 1, 2, 3, 4, 5, 6, 9]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 3, 4, 5, 6, 7, 9, 10, 13, 14], b (2): [0, 4, 10, 11, 13, 14]
+idx: 3, delta: 3, matching: false, a (6): [1, 3, 4, 6, 7, 8, 9, 11, 12, 15, 16], b (1): [0, 4, 10, 11, 13, 14]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2, 3, 4, 8, 9], b (0): [0, 2, 7, 9]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 3, 4, 5, 6, 9], b (5): [1, 2, 3, 4, 5, 6, 7, 9, 10, 13, 14]
+idx: 4, delta: 2, matching: false, a (6): [1, 3, 4, 6, 7, 8, 9, 11, 12, 15, 16], b (3): [0, 2, 7, 9]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 2, 3, 4, 8, 9], b (2): [0, 4, 10, 11, 13, 14]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 3, 4, 5, 6, 10, 11, 16], b (1): [0, 4, 10, 11, 13, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 3, 4, 5, 6, 7, 9, 10, 13, 14], b (6): [1, 3, 4, 6, 7, 8, 9, 11, 12, 15, 16]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2, 3, 4, 8, 9], b (4): [0, 1, 2, 3, 4, 5, 6, 9]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 3, 4, 5, 6, 10, 11, 16], b (3): [0, 2, 7, 9]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 3, 4, 6, 7, 8, 9, 11, 12, 15, 16], b (7): [0, 1, 2, 3, 4, 8, 9]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 3, 4, 5, 6, 10, 11, 16], b (5): [1, 2, 3, 4, 5, 6, 7, 9, 10, 13, 14]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 2, 3, 4, 8, 9], b (8): [0, 1, 3, 4, 5, 6, 10, 11, 16]
+idx: 7 --- EXITING WITH false
+idx: 8 --- EXITING WITH false
+#.#....#.#.......
+#...#.....##.##..
+#...#.....##.##..
+#.#....#.#.......
+#######..#.......
+.#######.##..##..
+.#.##.####.##..##
+#####...##.......
+##.####...##....#
+16 (vert: 16, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 3, 7, 10, 11, 12], b (1): [3, 4, 6, 8, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [3, 4, 6, 8, 10], b (2): [0, 3, 4, 6, 8]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 4, 5, 7, 8, 11, 12], b (0): [0, 2, 3, 7, 10, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 4, 6, 8], b (3): [2, 3, 4, 5, 7, 8, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [0, 2, 3, 5, 9, 11, 12], b (1): [3, 4, 6, 8, 10]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 4, 6, 8, 10, 11, 12], b (0): [0, 2, 3, 7, 10, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 3, 4, 5, 7, 8, 11, 12], b (4): [0, 2, 3, 5, 9, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 4, 6, 8, 10, 11, 12], b (2): [0, 3, 4, 6, 8]
+idx: 3, delta: 3, matching: false, a (6): [0, 3, 5, 6, 9, 11, 12], b (1): [3, 4, 6, 8, 10]
+idx: 3, delta: 4, matching: false, a (7): [0, 3, 5, 6, 9, 11, 12], b (0): [0, 2, 3, 7, 10, 11, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 2, 3, 5, 9, 11, 12], b (5): [0, 1, 2, 4, 6, 8, 10, 11, 12]
+idx: 4, delta: 2, matching: false, a (6): [0, 3, 5, 6, 9, 11, 12], b (3): [2, 3, 4, 5, 7, 8, 11, 12]
+idx: 4, delta: 3, matching: false, a (7): [0, 3, 5, 6, 9, 11, 12], b (2): [0, 3, 4, 6, 8]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 4, 6, 8, 10, 11, 12], b (1): [3, 4, 6, 8, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 4, 6, 8, 10, 11, 12], b (6): [0, 3, 5, 6, 9, 11, 12]
+idx: 5, delta: 2, matching: false, a (7): [0, 3, 5, 6, 9, 11, 12], b (4): [0, 2, 3, 5, 9, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 4, 6, 8, 10, 11, 12], b (3): [2, 3, 4, 5, 7, 8, 11, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: true, a (6): [0, 3, 5, 6, 9, 11, 12], b (7): [0, 3, 5, 6, 9, 11, 12]
+idx: 6, delta: 2, matching: false, a (8): [0, 2, 4, 6, 8, 10, 11, 12], b (5): [0, 1, 2, 4, 6, 8, 10, 11, 12]
+idx: 6, delta: 2 --- found smudge!
+idx: 6 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 4, 5, 6, 7, 8], b (1): [5]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [5], b (2): [0, 3, 4, 5, 8]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 4, 6, 7], b (0): [0, 2, 4, 5, 6, 7, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 4, 5, 8], b (3): [0, 1, 2, 3, 4, 6, 7]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 5, 8], b (1): [5]
+idx: 2, delta: 3, matching: false, a (5): [3, 4, 6, 7], b (0): [0, 2, 4, 5, 6, 7, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 3, 4, 6, 7], b (4): [1, 2, 3, 5, 8]
+idx: 3, delta: 2, matching: false, a (5): [3, 4, 6, 7], b (2): [0, 3, 4, 5, 8]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 5, 6, 7, 8], b (1): [5]
+idx: 3, delta: 4, matching: false, a (7): [0, 3], b (0): [0, 2, 4, 5, 6, 7, 8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 5, 8], b (5): [3, 4, 6, 7]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 5, 6, 7, 8], b (3): [0, 1, 2, 3, 4, 6, 7]
+idx: 4, delta: 3, matching: false, a (7): [0, 3], b (2): [0, 3, 4, 5, 8]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 3, 5, 8], b (1): [5]
+idx: 4, delta: 5, matching: false, a (9): [4, 6, 7], b (0): [0, 2, 4, 5, 6, 7, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [3, 4, 6, 7], b (6): [1, 2, 5, 6, 7, 8]
+idx: 5, delta: 2, matching: false, a (7): [0, 3], b (4): [1, 2, 3, 5, 8]
+idx: 5, delta: 3, matching: false, a (8): [1, 2, 3, 5, 8], b (3): [0, 1, 2, 3, 4, 6, 7]
+idx: 5, delta: 4, matching: false, a (9): [4, 6, 7], b (2): [0, 3, 4, 5, 8]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 5, 8], b (1): [5]
+idx: 5, delta: 6, matching: false, a (11): [0, 3, 4, 5, 6, 7, 8], b (0): [0, 2, 4, 5, 6, 7, 8]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 5, 6, 7, 8], b (7): [0, 3]
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 3, 5, 8], b (5): [3, 4, 6, 7]
+idx: 6, delta: 3, matching: false, a (9): [4, 6, 7], b (4): [1, 2, 3, 5, 8]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 5, 8], b (3): [0, 1, 2, 3, 4, 6, 7]
+idx: 6, delta: 5, matching: false, a (11): [0, 3, 4, 5, 6, 7, 8], b (2): [0, 3, 4, 5, 8]
+idx: 6, delta: 6, matching: false, a (12): [0, 3, 4, 5, 6, 7, 8], b (1): [5]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 3], b (8): [1, 2, 3, 5, 8]
+idx: 7, delta: 2, matching: false, a (9): [4, 6, 7], b (6): [1, 2, 5, 6, 7, 8]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 5, 8], b (5): [3, 4, 6, 7]
+idx: 7, delta: 4, matching: false, a (11): [0, 3, 4, 5, 6, 7, 8], b (4): [1, 2, 3, 5, 8]
+idx: 7, delta: 5, matching: false, a (12): [0, 3, 4, 5, 6, 7, 8], b (3): [0, 1, 2, 3, 4, 6, 7]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [1, 2, 3, 5, 8], b (9): [4, 6, 7]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 5, 8], b (7): [0, 3]
+idx: 8, delta: 3, matching: false, a (11): [0, 3, 4, 5, 6, 7, 8], b (6): [1, 2, 5, 6, 7, 8]
+idx: 8, delta: 4, matching: false, a (12): [0, 3, 4, 5, 6, 7, 8], b (5): [3, 4, 6, 7]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [4, 6, 7], b (10): [0, 1, 5, 8]
+idx: 9, delta: 2, matching: false, a (11): [0, 3, 4, 5, 6, 7, 8], b (8): [1, 2, 3, 5, 8]
+idx: 9, delta: 3, matching: false, a (12): [0, 3, 4, 5, 6, 7, 8], b (7): [0, 3]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 5, 8], b (11): [0, 3, 4, 5, 6, 7, 8]
+idx: 10, delta: 2, matching: false, a (12): [0, 3, 4, 5, 6, 7, 8], b (9): [4, 6, 7]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: true, a (11): [0, 3, 4, 5, 6, 7, 8], b (12): [0, 3, 4, 5, 6, 7, 8]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+#.#.#####
+.....#...
+#..###..#
+#####.##.
+.###.#..#
+...##.##.
+.##..####
+#..#.....
+.###.#..#
+....#.##.
+##...#..#
+#..######
+#..######
+7 (vert: 7, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 4, 5], b (1): [0, 2, 4, 5]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 4, 5], b (2): [0, 2, 3, 6]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2], b (0): [1, 4, 5]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 3, 6], b (3): [0, 1, 2]
+idx: 2, delta: 2, matching: false, a (4): [0, 4, 5], b (1): [0, 2, 4, 5]
+idx: 2, delta: 2 --- found smudge!
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 4, 5, 6], b (0): [1, 4, 5]
+idx: 2, delta: 3 --- found smudge twice!
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2], b (4): [0, 4, 5]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 4, 5, 6], b (2): [0, 2, 3, 6]
+idx: 3, delta: 3, matching: false, a (6): [3, 4, 5, 6], b (1): [0, 2, 4, 5]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2, 3, 6], b (0): [1, 4, 5]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 4, 5], b (5): [0, 2, 3, 4, 5, 6]
+idx: 4, delta: 2, matching: false, a (6): [3, 4, 5, 6], b (3): [0, 1, 2]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 2, 3, 6], b (2): [0, 2, 3, 6]
+idx: 4, delta: 3 --- found smudge!
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 3, 6], b (1): [0, 2, 4, 5]
+idx: 4, delta: 4 --- found smudge twice!
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 3, 4, 5, 6], b (6): [3, 4, 5, 6]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2, 3, 6], b (4): [0, 4, 5]
+idx: 5, delta: 3, matching: false, a (8): [1, 2, 3, 6], b (3): [0, 1, 2]
+idx: 5, delta: 4, matching: false, a (9): [1, 2, 3, 6], b (2): [0, 2, 3, 6]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 2, 3, 6], b (1): [0, 2, 4, 5]
+idx: 5, delta: 6, matching: false, a (11): [3, 4, 5, 6], b (0): [1, 4, 5]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [3, 4, 5, 6], b (7): [0, 1, 2, 3, 6]
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 3, 6], b (5): [0, 2, 3, 4, 5, 6]
+idx: 6, delta: 3, matching: false, a (9): [1, 2, 3, 6], b (4): [0, 4, 5]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 2, 3, 6], b (3): [0, 1, 2]
+idx: 6, delta: 5, matching: false, a (11): [3, 4, 5, 6], b (2): [0, 2, 3, 6]
+idx: 6, delta: 6, matching: false, a (12): [0, 2, 3, 4, 5, 6], b (1): [0, 2, 4, 5]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 4, 5], b (0): [1, 4, 5]
+idx: 6, delta: 7 --- found smudge!
+idx: 6 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 3, 4, 5, 7, 10, 12, 13, 14, 15, 16], b (1): [0, 3, 7, 8, 9, 10, 13, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 3, 7, 8, 9, 10, 13, 14], b (2): [1, 2, 3, 5, 7, 8, 9, 10, 12, 14, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [2, 5, 6, 7, 8, 9, 10, 11, 12, 15], b (0): [1, 2, 3, 4, 5, 7, 10, 12, 13, 14, 15, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 2, 3, 5, 7, 8, 9, 10, 12, 14, 15, 16], b (3): [2, 5, 6, 7, 8, 9, 10, 11, 12, 15]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 4, 5, 6, 11, 12, 13, 16], b (1): [0, 3, 7, 8, 9, 10, 13, 14]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 4, 5, 6, 11, 12, 13, 16], b (0): [1, 2, 3, 4, 5, 7, 10, 12, 13, 14, 15, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 5, 6, 7, 8, 9, 10, 11, 12, 15], b (4): [0, 1, 4, 5, 6, 11, 12, 13, 16]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 4, 5, 6, 11, 12, 13, 16], b (2): [1, 2, 3, 5, 7, 8, 9, 10, 12, 14, 15, 16]
+idx: 3, delta: 3, matching: false, a (6): [2, 5, 6, 7, 8, 9, 10, 11, 12, 15], b (1): [0, 3, 7, 8, 9, 10, 13, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: true, a (4): [0, 1, 4, 5, 6, 11, 12, 13, 16], b (5): [0, 1, 4, 5, 6, 11, 12, 13, 16]
+idx: 4, delta: 2, matching: true, a (6): [2, 5, 6, 7, 8, 9, 10, 11, 12, 15], b (3): [2, 5, 6, 7, 8, 9, 10, 11, 12, 15]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 4, 5, 6, 11, 12, 13, 16], b (6): [2, 5, 6, 7, 8, 9, 10, 11, 12, 15]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+.#####.#..#.#####
+#..#...####..##..
+.###.#.####.#.###
+..#..########..#.
+##..###....###..#
+##..###....###..#
+..#..########..#.
+7 (vert: 7, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 15, 16], b (1): [2, 3, 4, 9, 10, 11, 14, 15, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 3, 4, 9, 10, 11, 14, 15, 16], b (2): [2, 4, 5, 6, 7, 8, 9, 11, 14, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [0, 3, 5, 6, 7, 8, 10, 13, 15, 16], b (0): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 15, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 4, 5, 6, 7, 8, 9, 11, 14, 15, 16], b (3): [0, 3, 5, 6, 7, 8, 10, 13, 15, 16]
+idx: 2, delta: 2, matching: false, a (4): [2, 3, 5, 8, 10, 11, 15, 16], b (1): [2, 3, 4, 9, 10, 11, 14, 15, 16]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 3, 4, 9, 10, 11, 12, 14], b (0): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 15, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 3, 5, 6, 7, 8, 10, 13, 15, 16], b (4): [2, 3, 5, 8, 10, 11, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 3, 4, 9, 10, 11, 12, 14], b (2): [2, 4, 5, 6, 7, 8, 9, 11, 14, 15, 16]
+idx: 3, delta: 3, matching: false, a (6): [3, 5, 8, 10, 14], b (1): [2, 3, 4, 9, 10, 11, 14, 15, 16]
+idx: 3, delta: 4, matching: false, a (7): [3, 4, 5, 8, 9, 10], b (0): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 15, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 3, 5, 8, 10, 11, 15, 16], b (5): [1, 2, 3, 4, 9, 10, 11, 12, 14]
+idx: 4, delta: 2, matching: false, a (6): [3, 5, 8, 10, 14], b (3): [0, 3, 5, 6, 7, 8, 10, 13, 15, 16]
+idx: 4, delta: 3, matching: false, a (7): [3, 4, 5, 8, 9, 10], b (2): [2, 4, 5, 6, 7, 8, 9, 11, 14, 15, 16]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 3, 5, 8, 10, 11, 13, 15, 16], b (1): [2, 3, 4, 9, 10, 11, 14, 15, 16]
+idx: 4, delta: 5, matching: false, a (9): [0, 2, 3, 6, 7, 10, 11, 13, 15, 16], b (0): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 15, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 3, 4, 9, 10, 11, 12, 14], b (6): [3, 5, 8, 10, 14]
+idx: 5, delta: 2, matching: false, a (7): [3, 4, 5, 8, 9, 10], b (4): [2, 3, 5, 8, 10, 11, 15, 16]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 3, 5, 8, 10, 11, 13, 15, 16], b (3): [0, 3, 5, 6, 7, 8, 10, 13, 15, 16]
+idx: 5, delta: 4, matching: false, a (9): [0, 2, 3, 6, 7, 10, 11, 13, 15, 16], b (2): [2, 4, 5, 6, 7, 8, 9, 11, 14, 15, 16]
+idx: 5, delta: 5, matching: false, a (10): [4, 9, 15, 16], b (1): [2, 3, 4, 9, 10, 11, 14, 15, 16]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 3, 4, 6, 7, 9, 10, 12, 13, 15, 16], b (0): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 15, 16]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [3, 5, 8, 10, 14], b (7): [3, 4, 5, 8, 9, 10]
+idx: 6, delta: 2, matching: false, a (8): [0, 2, 3, 5, 8, 10, 11, 13, 15, 16], b (5): [1, 2, 3, 4, 9, 10, 11, 12, 14]
+idx: 6, delta: 3, matching: false, a (9): [0, 2, 3, 6, 7, 10, 11, 13, 15, 16], b (4): [2, 3, 5, 8, 10, 11, 15, 16]
+idx: 6, delta: 4, matching: false, a (10): [4, 9, 15, 16], b (3): [0, 3, 5, 6, 7, 8, 10, 13, 15, 16]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 3, 4, 6, 7, 9, 10, 12, 13, 15, 16], b (2): [2, 4, 5, 6, 7, 8, 9, 11, 14, 15, 16]
+idx: 6, delta: 6, matching: false, a (12): [2, 3, 4, 5, 6, 7, 9, 10, 11, 14], b (1): [2, 3, 4, 9, 10, 11, 14, 15, 16]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 4, 6, 7, 9, 12, 13, 14], b (0): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 15, 16]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [3, 4, 5, 8, 9, 10], b (8): [0, 2, 3, 5, 8, 10, 11, 13, 15, 16]
+idx: 7, delta: 2, matching: false, a (9): [0, 2, 3, 6, 7, 10, 11, 13, 15, 16], b (6): [3, 5, 8, 10, 14]
+idx: 7, delta: 3, matching: false, a (10): [4, 9, 15, 16], b (5): [1, 2, 3, 4, 9, 10, 11, 12, 14]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 3, 4, 6, 7, 9, 10, 12, 13, 15, 16], b (4): [2, 3, 5, 8, 10, 11, 15, 16]
+idx: 7, delta: 5, matching: false, a (12): [2, 3, 4, 5, 6, 7, 9, 10, 11, 14], b (3): [0, 3, 5, 6, 7, 8, 10, 13, 15, 16]
+idx: 7, delta: 6, matching: false, a (13): [0, 1, 4, 6, 7, 9, 12, 13, 14], b (2): [2, 4, 5, 6, 7, 8, 9, 11, 14, 15, 16]
+idx: 7, delta: 7, matching: false, a (14): [2, 6, 7, 11], b (1): [2, 3, 4, 9, 10, 11, 14, 15, 16]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 2, 3, 5, 8, 10, 11, 13, 15, 16], b (9): [0, 2, 3, 6, 7, 10, 11, 13, 15, 16]
+idx: 8, delta: 2, matching: false, a (10): [4, 9, 15, 16], b (7): [3, 4, 5, 8, 9, 10]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 3, 4, 6, 7, 9, 10, 12, 13, 15, 16], b (6): [3, 5, 8, 10, 14]
+idx: 8, delta: 4, matching: false, a (12): [2, 3, 4, 5, 6, 7, 9, 10, 11, 14], b (5): [1, 2, 3, 4, 9, 10, 11, 12, 14]
+idx: 8, delta: 5, matching: false, a (13): [0, 1, 4, 6, 7, 9, 12, 13, 14], b (4): [2, 3, 5, 8, 10, 11, 15, 16]
+idx: 8, delta: 6, matching: false, a (14): [2, 6, 7, 11], b (3): [0, 3, 5, 6, 7, 8, 10, 13, 15, 16]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 2, 3, 6, 7, 10, 11, 13, 15, 16], b (10): [4, 9, 15, 16]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 3, 4, 6, 7, 9, 10, 12, 13, 15, 16], b (8): [0, 2, 3, 5, 8, 10, 11, 13, 15, 16]
+idx: 9, delta: 3, matching: false, a (12): [2, 3, 4, 5, 6, 7, 9, 10, 11, 14], b (7): [3, 4, 5, 8, 9, 10]
+idx: 9, delta: 4, matching: false, a (13): [0, 1, 4, 6, 7, 9, 12, 13, 14], b (6): [3, 5, 8, 10, 14]
+idx: 9, delta: 5, matching: false, a (14): [2, 6, 7, 11], b (5): [1, 2, 3, 4, 9, 10, 11, 12, 14]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [4, 9, 15, 16], b (11): [0, 1, 3, 4, 6, 7, 9, 10, 12, 13, 15, 16]
+idx: 10, delta: 2, matching: false, a (12): [2, 3, 4, 5, 6, 7, 9, 10, 11, 14], b (9): [0, 2, 3, 6, 7, 10, 11, 13, 15, 16]
+idx: 10, delta: 3, matching: false, a (13): [0, 1, 4, 6, 7, 9, 12, 13, 14], b (8): [0, 2, 3, 5, 8, 10, 11, 13, 15, 16]
+idx: 10, delta: 4, matching: false, a (14): [2, 6, 7, 11], b (7): [3, 4, 5, 8, 9, 10]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 3, 4, 6, 7, 9, 10, 12, 13, 15, 16], b (12): [2, 3, 4, 5, 6, 7, 9, 10, 11, 14]
+idx: 11, delta: 2, matching: false, a (13): [0, 1, 4, 6, 7, 9, 12, 13, 14], b (10): [4, 9, 15, 16]
+idx: 11, delta: 3, matching: false, a (14): [2, 6, 7, 11], b (9): [0, 2, 3, 6, 7, 10, 11, 13, 15, 16]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [2, 3, 4, 5, 6, 7, 9, 10, 11, 14], b (13): [0, 1, 4, 6, 7, 9, 12, 13, 14]
+idx: 12, delta: 2, matching: false, a (14): [2, 6, 7, 11], b (11): [0, 1, 3, 4, 6, 7, 9, 10, 12, 13, 15, 16]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 1, 4, 6, 7, 9, 12, 13, 14], b (14): [2, 6, 7, 11]
+idx: 13 --- EXITING WITH false
+idx: 14 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [3, 8, 9, 11, 13], b (1): [0, 5, 11, 13]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 5, 11, 13], b (2): [0, 1, 2, 4, 5, 8, 9, 12, 14]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 3, 4, 5, 6, 7, 8, 9, 11, 12], b (0): [3, 8, 9, 11, 13]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 4, 5, 8, 9, 12, 14], b (3): [0, 1, 3, 4, 5, 6, 7, 8, 9, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 5, 7, 10, 11, 12, 13], b (1): [0, 5, 11, 13]
+idx: 2, delta: 3, matching: false, a (5): [2, 3, 4, 6, 7, 8, 12], b (0): [3, 8, 9, 11, 13]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 3, 4, 5, 6, 7, 8, 9, 11, 12], b (4): [0, 1, 2, 5, 7, 10, 11, 12, 13]
+idx: 3, delta: 2, matching: false, a (5): [2, 3, 4, 6, 7, 8, 12], b (2): [0, 1, 2, 4, 5, 8, 9, 12, 14]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 3, 9, 11, 12, 13, 14], b (1): [0, 5, 11, 13]
+idx: 3, delta: 4, matching: false, a (7): [0, 2, 3, 9, 11, 12, 13, 14], b (0): [3, 8, 9, 11, 13]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 5, 7, 10, 11, 12, 13], b (5): [2, 3, 4, 6, 7, 8, 12]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 3, 9, 11, 12, 13, 14], b (3): [0, 1, 3, 4, 5, 6, 7, 8, 9, 11, 12]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 3, 9, 11, 12, 13, 14], b (2): [0, 1, 2, 4, 5, 8, 9, 12, 14]
+idx: 4, delta: 4, matching: false, a (8): [2, 3, 4, 6, 7, 8], b (1): [0, 5, 11, 13]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 5, 7, 10, 11, 12, 13], b (0): [3, 8, 9, 11, 13]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 3, 4, 6, 7, 8, 12], b (6): [0, 2, 3, 9, 11, 12, 13, 14]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 3, 9, 11, 12, 13, 14], b (4): [0, 1, 2, 5, 7, 10, 11, 12, 13]
+idx: 5, delta: 3, matching: false, a (8): [2, 3, 4, 6, 7, 8], b (3): [0, 1, 3, 4, 5, 6, 7, 8, 9, 11, 12]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 5, 7, 10, 11, 12, 13], b (2): [0, 1, 2, 4, 5, 8, 9, 12, 14]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 3, 4, 5, 6, 7, 8, 9, 11, 12], b (1): [0, 5, 11, 13]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2, 4, 5, 8, 9, 12, 14], b (0): [3, 8, 9, 11, 13]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: true, a (6): [0, 2, 3, 9, 11, 12, 13, 14], b (7): [0, 2, 3, 9, 11, 12, 13, 14]
+idx: 6, delta: 2, matching: false, a (8): [2, 3, 4, 6, 7, 8], b (5): [2, 3, 4, 6, 7, 8, 12]
+idx: 6, delta: 2 --- found smudge!
+idx: 6, delta: 3, matching: true, a (9): [0, 1, 2, 5, 7, 10, 11, 12, 13], b (4): [0, 1, 2, 5, 7, 10, 11, 12, 13]
+idx: 6, delta: 4, matching: true, a (10): [0, 1, 3, 4, 5, 6, 7, 8, 9, 11, 12], b (3): [0, 1, 3, 4, 5, 6, 7, 8, 9, 11, 12]
+idx: 6, delta: 5, matching: true, a (11): [0, 1, 2, 4, 5, 8, 9, 12, 14], b (2): [0, 1, 2, 4, 5, 8, 9, 12, 14]
+idx: 6, delta: 6, matching: true, a (12): [0, 5, 11, 13], b (1): [0, 5, 11, 13]
+idx: 6, delta: 7, matching: true, a (13): [3, 8, 9, 11, 13], b (0): [3, 8, 9, 11, 13]
+idx: 6 --- EXITING WITH true
+...#....##.#.#.
+#....#.....#.#.
+###.##..##..#.#
+##.#######.##..
+###..#.#..####.
+..###.###...#..
+#.##.....#.####
+#.##.....#.####
+..###.###......
+###..#.#..####.
+##.#######.##..
+###.##..##..#.#
+#....#.....#.#.
+...#....##.#.#.
+.##..##.....##.
+#####...####...
+#####...####...
+700 (vert: 0, horiz: 7)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 4, 5, 7, 8], b (1): [1, 2, 4, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 4, 6], b (2): [0, 1, 4]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2], b (0): [0, 1, 4, 5, 7, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 4], b (3): [0, 1, 2]
+idx: 2, delta: 2, matching: false, a (4): [0, 2, 4], b (1): [1, 2, 4, 6]
+idx: 2, delta: 3, matching: false, a (5): [2, 5, 7, 8], b (0): [0, 1, 4, 5, 7, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2], b (4): [0, 2, 4]
+idx: 3, delta: 2, matching: false, a (5): [2, 5, 7, 8], b (2): [0, 1, 4]
+idx: 3, delta: 3, matching: false, a (6): [1, 5, 8], b (1): [1, 2, 4, 6]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2, 3, 6], b (0): [0, 1, 4, 5, 7, 8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 2, 4], b (5): [2, 5, 7, 8]
+idx: 4, delta: 2, matching: false, a (6): [1, 5, 8], b (3): [0, 1, 2]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 2, 3, 6], b (2): [0, 1, 4]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 4, 6, 7, 8], b (1): [1, 2, 4, 6]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 4, 5, 6], b (0): [0, 1, 4, 5, 7, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 5, 7, 8], b (6): [1, 5, 8]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2, 3, 6], b (4): [0, 2, 4]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 4, 6, 7, 8], b (3): [0, 1, 2]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 4, 5, 6], b (2): [0, 1, 4]
+idx: 5, delta: 5, matching: false, a (10): [0, 3, 5], b (1): [1, 2, 4, 6]
+idx: 5, delta: 6, matching: false, a (11): [0, 2, 4, 5, 6], b (0): [0, 1, 4, 5, 7, 8]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 5, 8], b (7): [0, 1, 2, 3, 6]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 4, 6, 7, 8], b (5): [2, 5, 7, 8]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 4, 5, 6], b (4): [0, 2, 4]
+idx: 6, delta: 4, matching: false, a (10): [0, 3, 5], b (3): [0, 1, 2]
+idx: 6, delta: 5, matching: false, a (11): [0, 2, 4, 5, 6], b (2): [0, 1, 4]
+idx: 6, delta: 6, matching: false, a (12): [0, 2, 4, 5, 6], b (1): [1, 2, 4, 6]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 2, 3, 6], b (8): [0, 1, 2, 4, 6, 7, 8]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 4, 5, 6], b (6): [1, 5, 8]
+idx: 7, delta: 3, matching: false, a (10): [0, 3, 5], b (5): [2, 5, 7, 8]
+idx: 7, delta: 4, matching: false, a (11): [0, 2, 4, 5, 6], b (4): [0, 2, 4]
+idx: 7, delta: 5, matching: false, a (12): [0, 2, 4, 5, 6], b (3): [0, 1, 2]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 2, 4, 6, 7, 8], b (9): [0, 1, 4, 5, 6]
+idx: 8, delta: 2, matching: false, a (10): [0, 3, 5], b (7): [0, 1, 2, 3, 6]
+idx: 8, delta: 3, matching: false, a (11): [0, 2, 4, 5, 6], b (6): [1, 5, 8]
+idx: 8, delta: 4, matching: false, a (12): [0, 2, 4, 5, 6], b (5): [2, 5, 7, 8]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 4, 5, 6], b (10): [0, 3, 5]
+idx: 9, delta: 2, matching: false, a (11): [0, 2, 4, 5, 6], b (8): [0, 1, 2, 4, 6, 7, 8]
+idx: 9, delta: 3, matching: false, a (12): [0, 2, 4, 5, 6], b (7): [0, 1, 2, 3, 6]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 3, 5], b (11): [0, 2, 4, 5, 6]
+idx: 10, delta: 2, matching: false, a (12): [0, 2, 4, 5, 6], b (9): [0, 1, 4, 5, 6]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: true, a (11): [0, 2, 4, 5, 6], b (12): [0, 2, 4, 5, 6]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 3, 4, 7, 8, 9, 10, 11, 12], b (1): [0, 1, 2, 3, 6, 7, 8, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 3, 6, 7, 8, 9], b (2): [1, 3, 4, 5, 7, 8, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [7, 10], b (0): [0, 2, 3, 4, 7, 8, 9, 10, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 3, 4, 5, 7, 8, 11, 12], b (3): [7, 10]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 4, 8, 9, 11, 12], b (1): [0, 1, 2, 3, 6, 7, 8, 9]
+idx: 2, delta: 3, matching: false, a (5): [0, 5, 6, 9, 10, 11, 12], b (0): [0, 2, 3, 4, 7, 8, 9, 10, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [7, 10], b (4): [0, 1, 2, 4, 8, 9, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [0, 5, 6, 9, 10, 11, 12], b (2): [1, 3, 4, 5, 7, 8, 11, 12]
+idx: 3, delta: 3, matching: false, a (6): [1, 7, 8, 9, 11, 12], b (1): [0, 1, 2, 3, 6, 7, 8, 9]
+idx: 3, delta: 4, matching: false, a (7): [0, 5, 8], b (0): [0, 2, 3, 4, 7, 8, 9, 10, 11, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 4, 8, 9, 11, 12], b (5): [0, 5, 6, 9, 10, 11, 12]
+idx: 4, delta: 2, matching: false, a (6): [1, 7, 8, 9, 11, 12], b (3): [7, 10]
+idx: 4, delta: 3, matching: false, a (7): [0, 5, 8], b (2): [1, 3, 4, 5, 7, 8, 11, 12]
+idx: 4, delta: 4, matching: false, a (8): [0, 5, 6, 8], b (1): [0, 1, 2, 3, 6, 7, 8, 9]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 5, 6, 9, 10, 11, 12], b (6): [1, 7, 8, 9, 11, 12]
+idx: 5, delta: 2, matching: false, a (7): [0, 5, 8], b (4): [0, 1, 2, 4, 8, 9, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [0, 5, 6, 8], b (3): [7, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 7, 8, 9, 11, 12], b (7): [0, 5, 8]
+idx: 6, delta: 2, matching: false, a (8): [0, 5, 6, 8], b (5): [0, 5, 6, 9, 10, 11, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 5, 8], b (8): [0, 5, 6, 8]
+idx: 7, delta: 0 --- found smudge!
+idx: 7 --- EXITING WITH true
+#.###..######
+####..####...
+.#.###.##..##
+.......#..#..
+###.#...##.##
+#....##..####
+.#.....###.##
+#....#..#....
+#....##.#....
+800 (vert: 0, horiz: 8)
+
+idx: 0, delta: 0, matching: false, a (0): [8, 9, 10, 11, 12], b (1): [1, 2, 5, 6, 8, 10, 11]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 5, 6, 8, 10, 11], b (2): [0, 1, 3, 4, 5, 6, 7, 9, 10, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 3, 4, 5, 6, 10, 11], b (0): [8, 9, 10, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 3, 4, 5, 6, 7, 9, 10, 11, 12], b (3): [1, 2, 3, 4, 5, 6, 10, 11]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 4, 6, 7, 8], b (1): [1, 2, 5, 6, 8, 10, 11]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 5, 7, 8], b (0): [8, 9, 10, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 3, 4, 5, 6, 10, 11], b (4): [0, 1, 3, 4, 6, 7, 8]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 5, 7, 8], b (2): [0, 1, 3, 4, 5, 6, 7, 9, 10, 11, 12]
+idx: 3, delta: 3, matching: false, a (6): [1, 3, 4, 6, 10, 11], b (1): [1, 2, 5, 6, 8, 10, 11]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 3, 4, 5, 6, 10, 11], b (0): [8, 9, 10, 11, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3, 4, 6, 7, 8], b (5): [0, 2, 5, 7, 8]
+idx: 4, delta: 2, matching: false, a (6): [1, 3, 4, 6, 10, 11], b (3): [1, 2, 3, 4, 5, 6, 10, 11]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 3, 4, 5, 6, 10, 11], b (2): [0, 1, 3, 4, 5, 6, 7, 9, 10, 11, 12]
+idx: 4, delta: 4, matching: false, a (8): [1, 2, 3, 4, 5, 6, 8, 10, 11], b (1): [1, 2, 5, 6, 8, 10, 11]
+idx: 4, delta: 5, matching: false, a (9): [1, 2, 5, 6, 8, 10, 11], b (0): [8, 9, 10, 11, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 5, 7, 8], b (6): [1, 3, 4, 6, 10, 11]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 3, 4, 5, 6, 10, 11], b (4): [0, 1, 3, 4, 6, 7, 8]
+idx: 5, delta: 3, matching: false, a (8): [1, 2, 3, 4, 5, 6, 8, 10, 11], b (3): [1, 2, 3, 4, 5, 6, 10, 11]
+idx: 5, delta: 3 --- found smudge!
+idx: 5, delta: 4, matching: false, a (9): [1, 2, 5, 6, 8, 10, 11], b (2): [0, 1, 3, 4, 5, 6, 7, 9, 10, 11, 12]
+idx: 5, delta: 4 --- found smudge twice!
+idx: 6, delta: 0, matching: false, a (6): [1, 3, 4, 6, 10, 11], b (7): [1, 2, 3, 4, 5, 6, 10, 11]
+idx: 6, delta: 2, matching: false, a (8): [1, 2, 3, 4, 5, 6, 8, 10, 11], b (5): [0, 2, 5, 7, 8]
+idx: 6, delta: 3, matching: false, a (9): [1, 2, 5, 6, 8, 10, 11], b (4): [0, 1, 3, 4, 6, 7, 8]
+idx: 6, delta: 4, matching: false, a (10): [3, 4, 8], b (3): [1, 2, 3, 4, 5, 6, 10, 11]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 3, 4, 5, 6, 10, 11], b (8): [1, 2, 3, 4, 5, 6, 8, 10, 11]
+idx: 7, delta: 0 --- found smudge!
+idx: 7, delta: 2, matching: false, a (9): [1, 2, 5, 6, 8, 10, 11], b (6): [1, 3, 4, 6, 10, 11]
+idx: 7, delta: 2 --- found smudge twice!
+idx: 8, delta: 0, matching: false, a (8): [1, 2, 3, 4, 5, 6, 8, 10, 11], b (9): [1, 2, 5, 6, 8, 10, 11]
+idx: 8, delta: 2, matching: false, a (10): [3, 4, 8], b (7): [1, 2, 3, 4, 5, 6, 10, 11]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 2, 5, 6, 8, 10, 11], b (10): [3, 4, 8]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [2, 4, 5], b (1): [1, 2, 3, 4, 6, 7, 8, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 3, 4, 6, 7, 8, 9], b (2): [1, 3, 5, 7, 8, 9]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 4, 6, 7, 8, 10], b (0): [2, 4, 5]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 3, 5, 7, 8, 9], b (3): [2, 3, 4, 6, 7, 8, 10]
+idx: 2, delta: 2, matching: false, a (4): [2, 3, 4, 6, 7, 8, 10], b (1): [1, 2, 3, 4, 6, 7, 8, 9]
+idx: 2, delta: 3, matching: false, a (5): [1, 2, 3, 5, 7, 8, 9], b (0): [2, 4, 5]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [2, 3, 4, 6, 7, 8, 10], b (4): [2, 3, 4, 6, 7, 8, 10]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 3, 5, 7, 8, 9], b (2): [1, 3, 5, 7, 8, 9]
+idx: 3, delta: 2 --- found smudge!
+idx: 3, delta: 3, matching: true, a (6): [1, 2, 3, 4, 6, 7, 8, 9], b (1): [1, 2, 3, 4, 6, 7, 8, 9]
+idx: 3, delta: 4, matching: true, a (7): [2, 4, 5], b (0): [2, 4, 5]
+idx: 3 --- EXITING WITH true
+..#.##.....
+.####.####.
+.#.#.#.###.
+..###.###.#
+..###.###.#
+.###.#.###.
+.####.####.
+..#.##.....
+##..##..###
+#.#........
+####..####.
+####..####.
+#.#........
+400 (vert: 0, horiz: 4)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 3, 5, 6, 10, 11], b (1): [1, 2, 4, 7, 9, 11]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 4, 7, 9, 11], b (2): [1, 4, 5, 8, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [1, 4, 5, 8, 11, 12], b (0): [1, 3, 5, 6, 10, 11]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: true, a (2): [1, 4, 5, 8, 11, 12], b (3): [1, 4, 5, 8, 11, 12]
+idx: 2, delta: 2, matching: true, a (4): [1, 2, 4, 7, 9, 11], b (1): [1, 2, 4, 7, 9, 11]
+idx: 2, delta: 3, matching: false, a (5): [1, 3, 4, 5, 6, 10, 11], b (0): [1, 3, 5, 6, 10, 11]
+idx: 2, delta: 3 --- found smudge!
+idx: 2 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [6], b (1): [0, 1, 2, 3, 4, 5]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 3, 4, 5], b (2): [1, 4, 7, 8]
+idx: 1, delta: 2, matching: false, a (3): [0, 5, 6, 7, 8], b (0): [6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 4, 7, 8], b (3): [0, 5, 6, 7, 8]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 4, 5, 7, 8], b (1): [0, 1, 2, 3, 4, 5]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 5, 6], b (0): [6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 5, 6, 7, 8], b (4): [1, 2, 3, 4, 5, 7, 8]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 5, 6], b (2): [1, 4, 7, 8]
+idx: 3, delta: 3, matching: false, a (6): [0, 5, 6], b (1): [0, 1, 2, 3, 4, 5]
+idx: 3, delta: 4, matching: false, a (7): [1, 4], b (0): [6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 4, 5, 7, 8], b (5): [0, 2, 3, 5, 6]
+idx: 4, delta: 2, matching: false, a (6): [0, 5, 6], b (3): [0, 5, 6, 7, 8]
+idx: 4, delta: 3, matching: false, a (7): [1, 4], b (2): [1, 4, 7, 8]
+idx: 4, delta: 4, matching: false, a (8): [2, 3, 6, 7, 8], b (1): [0, 1, 2, 3, 4, 5]
+idx: 4, delta: 5, matching: false, a (9): [1, 4, 7, 8], b (0): [6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 3, 5, 6], b (6): [0, 5, 6]
+idx: 5, delta: 2, matching: false, a (7): [1, 4], b (4): [1, 2, 3, 4, 5, 7, 8]
+idx: 5, delta: 3, matching: false, a (8): [2, 3, 6, 7, 8], b (3): [0, 5, 6, 7, 8]
+idx: 5, delta: 4, matching: true, a (9): [1, 4, 7, 8], b (2): [1, 4, 7, 8]
+idx: 5, delta: 5, matching: false, a (10): [0, 5, 7, 8], b (1): [0, 1, 2, 3, 4, 5]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6], b (0): [6]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 5, 6], b (7): [1, 4]
+idx: 6, delta: 2, matching: false, a (8): [2, 3, 6, 7, 8], b (5): [0, 2, 3, 5, 6]
+idx: 6, delta: 3, matching: false, a (9): [1, 4, 7, 8], b (4): [1, 2, 3, 4, 5, 7, 8]
+idx: 6, delta: 4, matching: false, a (10): [0, 5, 7, 8], b (3): [0, 5, 6, 7, 8]
+idx: 6, delta: 4 --- found smudge!
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6], b (2): [1, 4, 7, 8]
+idx: 6, delta: 5 --- found smudge twice!
+idx: 7, delta: 0, matching: false, a (7): [1, 4], b (8): [2, 3, 6, 7, 8]
+idx: 7, delta: 2, matching: false, a (9): [1, 4, 7, 8], b (6): [0, 5, 6]
+idx: 7, delta: 3, matching: false, a (10): [0, 5, 7, 8], b (5): [0, 2, 3, 5, 6]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6], b (4): [1, 2, 3, 4, 5, 7, 8]
+idx: 7, delta: 5, matching: false, a (12): [2, 3, 7, 8], b (3): [0, 5, 6, 7, 8]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [2, 3, 6, 7, 8], b (9): [1, 4, 7, 8]
+idx: 8, delta: 2, matching: false, a (10): [0, 5, 7, 8], b (7): [1, 4]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6], b (6): [0, 5, 6]
+idx: 8, delta: 4, matching: false, a (12): [2, 3, 7, 8], b (5): [0, 2, 3, 5, 6]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 4, 7, 8], b (10): [0, 5, 7, 8]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6], b (8): [2, 3, 6, 7, 8]
+idx: 9, delta: 3, matching: false, a (12): [2, 3, 7, 8], b (7): [1, 4]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 5, 7, 8], b (11): [0, 1, 2, 3, 4, 5, 6]
+idx: 10, delta: 2, matching: false, a (12): [2, 3, 7, 8], b (9): [1, 4, 7, 8]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 2, 3, 4, 5, 6], b (12): [2, 3, 7, 8]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+......#..
+######...
+.#..#..##
+#....####
+.#####.##
+#.##.##..
+#....##..
+.#..#....
+..##..###
+.#..#..##
+#....#.##
+#######..
+..##...##
+3 (vert: 3, horiz: 0)
+
+idx: 0, delta: 0, matching: true, a (0): [2, 4, 5, 6, 7, 8, 9], b (1): [2, 4, 5, 6, 7, 8, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 4, 5, 6, 7, 8, 9], b (2): [0, 2, 3, 6, 8, 10]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 3, 8, 9], b (0): [2, 4, 5, 6, 7, 8, 9]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 2, 3, 6, 8, 10], b (3): [1, 2, 3, 8, 9]
+idx: 2, delta: 2, matching: false, a (4): [1, 3, 4, 5, 6, 9], b (1): [2, 4, 5, 6, 7, 8, 9]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 5, 7, 9, 10], b (0): [2, 4, 5, 6, 7, 8, 9]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 3, 8, 9], b (4): [1, 3, 4, 5, 6, 9]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 5, 7, 9, 10], b (2): [0, 2, 3, 6, 8, 10]
+idx: 3, delta: 3, matching: false, a (6): [2, 4, 7, 8, 10], b (1): [2, 4, 5, 6, 7, 8, 9]
+idx: 3, delta: 4, matching: false, a (7): [2, 4, 7, 8, 10], b (0): [2, 4, 5, 6, 7, 8, 9]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 3, 4, 5, 6, 9], b (5): [0, 2, 5, 7, 9, 10]
+idx: 4, delta: 2, matching: false, a (6): [2, 4, 7, 8, 10], b (3): [1, 2, 3, 8, 9]
+idx: 4, delta: 3, matching: false, a (7): [2, 4, 7, 8, 10], b (2): [0, 2, 3, 6, 8, 10]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 4, 5, 7, 9, 10], b (1): [2, 4, 5, 6, 7, 8, 9]
+idx: 4, delta: 5, matching: false, a (9): [1, 3, 4, 5, 6, 9], b (0): [2, 4, 5, 6, 7, 8, 9]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 5, 7, 9, 10], b (6): [2, 4, 7, 8, 10]
+idx: 5, delta: 2, matching: false, a (7): [2, 4, 7, 8, 10], b (4): [1, 3, 4, 5, 6, 9]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 4, 5, 7, 9, 10], b (3): [1, 2, 3, 8, 9]
+idx: 5, delta: 4, matching: false, a (9): [1, 3, 4, 5, 6, 9], b (2): [0, 2, 3, 6, 8, 10]
+idx: 5, delta: 5, matching: false, a (10): [1, 2, 3, 8, 9], b (1): [2, 4, 5, 6, 7, 8, 9]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: true, a (6): [2, 4, 7, 8, 10], b (7): [2, 4, 7, 8, 10]
+idx: 6, delta: 2, matching: false, a (8): [0, 2, 4, 5, 7, 9, 10], b (5): [0, 2, 5, 7, 9, 10]
+idx: 6, delta: 2 --- found smudge!
+idx: 6, delta: 3, matching: true, a (9): [1, 3, 4, 5, 6, 9], b (4): [1, 3, 4, 5, 6, 9]
+idx: 6, delta: 4, matching: true, a (10): [1, 2, 3, 8, 9], b (3): [1, 2, 3, 8, 9]
+idx: 6 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [2, 5, 8], b (1): [3, 4, 9, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [3, 4, 9, 10], b (2): [0, 1, 2, 3, 5, 6, 7, 8, 10]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 4, 9, 10], b (0): [2, 5, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 5, 6, 7, 8, 10], b (3): [2, 3, 4, 9, 10]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 4, 6, 7, 8, 9], b (1): [3, 4, 9, 10]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 4, 5, 8, 9], b (0): [2, 5, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 3, 4, 9, 10], b (4): [0, 1, 4, 6, 7, 8, 9]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 4, 5, 8, 9], b (2): [0, 1, 2, 3, 5, 6, 7, 8, 10]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 4, 9], b (1): [3, 4, 9, 10]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 5, 6, 7, 8], b (0): [2, 5, 8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 4, 6, 7, 8, 9], b (5): [0, 1, 4, 5, 8, 9]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 4, 9], b (3): [2, 3, 4, 9, 10]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 5, 6, 7, 8], b (2): [0, 1, 2, 3, 5, 6, 7, 8, 10]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 3, 6, 7, 10], b (1): [3, 4, 9, 10]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 3, 4, 5, 8, 9, 10], b (0): [2, 5, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 4, 5, 8, 9], b (6): [0, 1, 2, 4, 9]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 5, 6, 7, 8], b (4): [0, 1, 4, 6, 7, 8, 9]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 3, 6, 7, 10], b (3): [2, 3, 4, 9, 10]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 3, 4, 5, 8, 9, 10], b (2): [0, 1, 2, 3, 5, 6, 7, 8, 10]
+idx: 5, delta: 5, matching: false, a (10): [2, 5, 6, 7, 8], b (1): [3, 4, 9, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 4, 9], b (7): [0, 1, 5, 6, 7, 8]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 3, 6, 7, 10], b (5): [0, 1, 4, 5, 8, 9]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 3, 4, 5, 8, 9, 10], b (4): [0, 1, 4, 6, 7, 8, 9]
+idx: 6, delta: 4, matching: false, a (10): [2, 5, 6, 7, 8], b (3): [2, 3, 4, 9, 10]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 5, 6, 7, 8], b (8): [0, 1, 2, 3, 6, 7, 10]
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 3, 4, 5, 8, 9, 10], b (6): [0, 1, 2, 4, 9]
+idx: 7, delta: 3, matching: false, a (10): [2, 5, 6, 7, 8], b (5): [0, 1, 4, 5, 8, 9]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 2, 3, 6, 7, 10], b (9): [0, 1, 3, 4, 5, 8, 9, 10]
+idx: 8, delta: 2, matching: false, a (10): [2, 5, 6, 7, 8], b (7): [0, 1, 5, 6, 7, 8]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 3, 4, 5, 8, 9, 10], b (10): [2, 5, 6, 7, 8]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+..#..#..#..
+...##....##
+####.####.#
+..###....##
+##..#.####.
+##..##..##.
+###.#....#.
+##...####..
+####..##..#
+##.###..###
+..#..####..
+7 (vert: 7, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 4, 5], b (1): [0, 1, 3, 5, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 3, 5, 6], b (2): [3, 6]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 3, 4, 5, 6], b (0): [0, 1, 2, 4, 5]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 6], b (3): [0, 1, 3, 4, 5, 6]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 6], b (1): [0, 1, 3, 5, 6]
+idx: 2, delta: 2 --- found smudge!
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 3, 4, 5, 6], b (0): [0, 1, 2, 4, 5]
+idx: 2, delta: 3 --- found smudge twice!
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 3, 4, 5, 6], b (4): [0, 1, 3, 6]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 3, 4, 5, 6], b (2): [3, 6]
+idx: 3, delta: 3, matching: false, a (6): [2], b (1): [0, 1, 3, 5, 6]
+idx: 3, delta: 4, matching: false, a (7): [2, 3, 6], b (0): [0, 1, 2, 4, 5]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3, 6], b (5): [0, 1, 3, 4, 5, 6]
+idx: 4, delta: 2, matching: false, a (6): [2], b (3): [0, 1, 3, 4, 5, 6]
+idx: 4, delta: 3, matching: false, a (7): [2, 3, 6], b (2): [3, 6]
+idx: 4, delta: 3 --- found smudge!
+idx: 4, delta: 4, matching: false, a (8): [2], b (1): [0, 1, 3, 5, 6]
+idx: 4, delta: 4 --- found smudge twice!
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 3, 4, 5, 6], b (6): [2]
+idx: 5, delta: 2, matching: false, a (7): [2, 3, 6], b (4): [0, 1, 3, 6]
+idx: 5, delta: 3, matching: false, a (8): [2], b (3): [0, 1, 3, 4, 5, 6]
+idx: 5, delta: 4, matching: false, a (9): [4, 5], b (2): [3, 6]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 3, 6], b (1): [0, 1, 3, 5, 6]
+idx: 5, delta: 5 --- found smudge!
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 2], b (0): [0, 1, 2, 4, 5]
+idx: 5, delta: 6 --- found smudge twice!
+idx: 6, delta: 0, matching: false, a (6): [2], b (7): [2, 3, 6]
+idx: 6, delta: 2, matching: false, a (8): [2], b (5): [0, 1, 3, 4, 5, 6]
+idx: 6, delta: 3, matching: false, a (9): [4, 5], b (4): [0, 1, 3, 6]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 3, 6], b (3): [0, 1, 3, 4, 5, 6]
+idx: 6, delta: 5, matching: false, a (11): [0, 1, 2], b (2): [3, 6]
+idx: 6, delta: 6, matching: false, a (12): [2, 3, 6], b (1): [0, 1, 3, 5, 6]
+idx: 6, delta: 7, matching: false, a (13): [0, 1, 3, 6], b (0): [0, 1, 2, 4, 5]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [2, 3, 6], b (8): [2]
+idx: 7, delta: 2, matching: false, a (9): [4, 5], b (6): [2]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 3, 6], b (5): [0, 1, 3, 4, 5, 6]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 2], b (4): [0, 1, 3, 6]
+idx: 7, delta: 5, matching: false, a (12): [2, 3, 6], b (3): [0, 1, 3, 4, 5, 6]
+idx: 7, delta: 6, matching: false, a (13): [0, 1, 3, 6], b (2): [3, 6]
+idx: 7, delta: 7, matching: false, a (14): [3, 4, 5, 6], b (1): [0, 1, 3, 5, 6]
+idx: 7, delta: 8, matching: false, a (15): [3, 6], b (0): [0, 1, 2, 4, 5]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [2], b (9): [4, 5]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 3, 6], b (7): [2, 3, 6]
+idx: 8, delta: 3, matching: false, a (11): [0, 1, 2], b (6): [2]
+idx: 8, delta: 4, matching: false, a (12): [2, 3, 6], b (5): [0, 1, 3, 4, 5, 6]
+idx: 8, delta: 5, matching: true, a (13): [0, 1, 3, 6], b (4): [0, 1, 3, 6]
+idx: 8, delta: 6, matching: false, a (14): [3, 4, 5, 6], b (3): [0, 1, 3, 4, 5, 6]
+idx: 8, delta: 7, matching: true, a (15): [3, 6], b (2): [3, 6]
+idx: 8, delta: 8, matching: false, a (16): [0, 1, 4, 5], b (1): [0, 1, 3, 5, 6]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [4, 5], b (10): [0, 1, 3, 6]
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 2], b (8): [2]
+idx: 9, delta: 3, matching: true, a (12): [2, 3, 6], b (7): [2, 3, 6]
+idx: 9, delta: 4, matching: false, a (13): [0, 1, 3, 6], b (6): [2]
+idx: 9, delta: 5, matching: false, a (14): [3, 4, 5, 6], b (5): [0, 1, 3, 4, 5, 6]
+idx: 9, delta: 6, matching: false, a (15): [3, 6], b (4): [0, 1, 3, 6]
+idx: 9, delta: 7, matching: false, a (16): [0, 1, 4, 5], b (3): [0, 1, 3, 4, 5, 6]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 3, 6], b (11): [0, 1, 2]
+idx: 10, delta: 2, matching: false, a (12): [2, 3, 6], b (9): [4, 5]
+idx: 10, delta: 3, matching: false, a (13): [0, 1, 3, 6], b (8): [2]
+idx: 10, delta: 4, matching: false, a (14): [3, 4, 5, 6], b (7): [2, 3, 6]
+idx: 10, delta: 5, matching: false, a (15): [3, 6], b (6): [2]
+idx: 10, delta: 6, matching: false, a (16): [0, 1, 4, 5], b (5): [0, 1, 3, 4, 5, 6]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 2], b (12): [2, 3, 6]
+idx: 11, delta: 2, matching: true, a (13): [0, 1, 3, 6], b (10): [0, 1, 3, 6]
+idx: 11, delta: 3, matching: false, a (14): [3, 4, 5, 6], b (9): [4, 5]
+idx: 11, delta: 4, matching: false, a (15): [3, 6], b (8): [2]
+idx: 11, delta: 5, matching: false, a (16): [0, 1, 4, 5], b (7): [2, 3, 6]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [2, 3, 6], b (13): [0, 1, 3, 6]
+idx: 12, delta: 2, matching: false, a (14): [3, 4, 5, 6], b (11): [0, 1, 2]
+idx: 12, delta: 3, matching: false, a (15): [3, 6], b (10): [0, 1, 3, 6]
+idx: 12, delta: 4, matching: false, a (16): [0, 1, 4, 5], b (9): [4, 5]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 1, 3, 6], b (14): [3, 4, 5, 6]
+idx: 13, delta: 2, matching: false, a (15): [3, 6], b (12): [2, 3, 6]
+idx: 13, delta: 2 --- found smudge!
+idx: 13, delta: 3, matching: false, a (16): [0, 1, 4, 5], b (11): [0, 1, 2]
+idx: 13, delta: 3 --- found smudge twice!
+idx: 14, delta: 0, matching: false, a (14): [3, 4, 5, 6], b (15): [3, 6]
+idx: 14, delta: 2, matching: false, a (16): [0, 1, 4, 5], b (13): [0, 1, 3, 6]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: false, a (15): [3, 6], b (16): [0, 1, 4, 5]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+idx: 0, delta: 0, matching: true, a (0): [0, 1, 3, 4, 5, 10, 11, 13, 16], b (1): [0, 1, 3, 4, 5, 10, 11, 13, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 3, 4, 5, 10, 11, 13, 16], b (2): [0, 6, 7, 8, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 3, 4, 5, 7, 10, 12, 13, 14, 15], b (0): [0, 1, 3, 4, 5, 10, 11, 13, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 6, 7, 8, 11, 12], b (3): [1, 2, 3, 4, 5, 7, 10, 12, 13, 14, 15]
+idx: 2, delta: 2, matching: false, a (4): [0, 3, 5, 9, 14, 16], b (1): [0, 1, 3, 4, 5, 10, 11, 13, 16]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 3, 5, 9, 14, 16], b (0): [0, 1, 3, 4, 5, 10, 11, 13, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 3, 4, 5, 7, 10, 12, 13, 14, 15], b (4): [0, 3, 5, 9, 14, 16]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 3, 5, 9, 14, 16], b (2): [0, 6, 7, 8, 11, 12]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 3, 4, 5, 7, 10, 12, 13, 14, 15], b (1): [0, 1, 3, 4, 5, 10, 11, 13, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 3, 5, 9, 14, 16], b (5): [0, 1, 3, 5, 9, 14, 16]
+idx: 4, delta: 0 --- found smudge!
+idx: 4, delta: 2, matching: true, a (6): [1, 2, 3, 4, 5, 7, 10, 12, 13, 14, 15], b (3): [1, 2, 3, 4, 5, 7, 10, 12, 13, 14, 15]
+idx: 4 --- EXITING WITH true
+##.###....##.#..#
+##.###....##.#..#
+#.....###..##....
+.#####.#..#.####.
+#..#.#...#....#.#
+##.#.#...#....#.#
+.#####.#..#.####.
+500 (vert: 0, horiz: 5)
+
+idx: 0, delta: 0, matching: false, a (0): [2, 3, 4, 8, 9, 10, 11, 12], b (1): [0, 1, 4, 5, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 4, 5, 12], b (2): [0, 1, 4, 5, 8, 9, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 7, 9, 10, 12], b (0): [2, 3, 4, 8, 9, 10, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 4, 5, 8, 9, 11, 12], b (3): [2, 3, 7, 9, 10, 12]
+idx: 2, delta: 2, matching: false, a (4): [2, 3, 7, 9, 10, 12], b (1): [0, 1, 4, 5, 12]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 4, 5, 8, 9, 11, 12], b (0): [2, 3, 4, 8, 9, 10, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [2, 3, 7, 9, 10, 12], b (4): [2, 3, 7, 9, 10, 12]
+idx: 3, delta: 2, matching: true, a (5): [0, 1, 4, 5, 8, 9, 11, 12], b (2): [0, 1, 4, 5, 8, 9, 11, 12]
+idx: 3, delta: 3, matching: true, a (6): [0, 1, 4, 5, 12], b (1): [0, 1, 4, 5, 12]
+idx: 3, delta: 4, matching: false, a (7): [2, 3, 4, 8, 9, 10, 12], b (0): [2, 3, 4, 8, 9, 10, 11, 12]
+idx: 3, delta: 4 --- found smudge!
+idx: 3 --- EXITING WITH true
+idx: 0, delta: 0, matching: true, a (0): [1, 2, 5, 6, 8, 9, 10], b (1): [1, 2, 5, 6, 8, 9, 10]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 5, 6, 8, 9, 10], b (2): [0, 3, 4, 7, 9, 10]
+idx: 1, delta: 2, matching: false, a (3): [0, 3, 4, 7, 8, 9, 10], b (0): [1, 2, 5, 6, 8, 9, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 4, 7, 9, 10], b (3): [0, 3, 4, 7, 8, 9, 10]
+idx: 2, delta: 0 --- found smudge!
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 2, 5, 6, 7, 8], b (1): [1, 2, 5, 6, 8, 9, 10]
+idx: 2, delta: 2 --- found smudge twice!
+idx: 3, delta: 0, matching: false, a (3): [0, 3, 4, 7, 8, 9, 10], b (4): [0, 1, 2, 5, 6, 7, 8]
+idx: 3, delta: 2, matching: false, a (5): [1, 2, 5, 6, 8, 9, 10], b (2): [0, 3, 4, 7, 9, 10]
+idx: 3, delta: 3, matching: false, a (6): [8], b (1): [1, 2, 5, 6, 8, 9, 10]
+idx: 3, delta: 4, matching: false, a (7): [3, 4], b (0): [1, 2, 5, 6, 8, 9, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 5, 6, 7, 8], b (5): [1, 2, 5, 6, 8, 9, 10]
+idx: 4, delta: 2, matching: false, a (6): [8], b (3): [0, 3, 4, 7, 8, 9, 10]
+idx: 4, delta: 3, matching: false, a (7): [3, 4], b (2): [0, 3, 4, 7, 9, 10]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 5, 7, 10], b (1): [1, 2, 5, 6, 8, 9, 10]
+idx: 4, delta: 5, matching: false, a (9): [0, 2, 3, 4, 5, 7, 8, 9], b (0): [1, 2, 5, 6, 8, 9, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [1, 2, 5, 6, 8, 9, 10], b (6): [8]
+idx: 5, delta: 2, matching: false, a (7): [3, 4], b (4): [0, 1, 2, 5, 6, 7, 8]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 5, 7, 10], b (3): [0, 3, 4, 7, 8, 9, 10]
+idx: 5, delta: 4, matching: false, a (9): [0, 2, 3, 4, 5, 7, 8, 9], b (2): [0, 3, 4, 7, 9, 10]
+idx: 5, delta: 5, matching: false, a (10): [0, 3, 4, 7], b (1): [1, 2, 5, 6, 8, 9, 10]
+idx: 5, delta: 6, matching: false, a (11): [0, 2, 5, 8, 9], b (0): [1, 2, 5, 6, 8, 9, 10]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [8], b (7): [3, 4]
+idx: 6, delta: 2, matching: false, a (8): [0, 2, 5, 7, 10], b (5): [1, 2, 5, 6, 8, 9, 10]
+idx: 6, delta: 3, matching: false, a (9): [0, 2, 3, 4, 5, 7, 8, 9], b (4): [0, 1, 2, 5, 6, 7, 8]
+idx: 6, delta: 4, matching: false, a (10): [0, 3, 4, 7], b (3): [0, 3, 4, 7, 8, 9, 10]
+idx: 6, delta: 5, matching: false, a (11): [0, 2, 5, 8, 9], b (2): [0, 3, 4, 7, 9, 10]
+idx: 6, delta: 6, matching: false, a (12): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], b (1): [1, 2, 5, 6, 8, 9, 10]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [3, 4], b (8): [0, 2, 5, 7, 10]
+idx: 7, delta: 2, matching: false, a (9): [0, 2, 3, 4, 5, 7, 8, 9], b (6): [8]
+idx: 7, delta: 3, matching: false, a (10): [0, 3, 4, 7], b (5): [1, 2, 5, 6, 8, 9, 10]
+idx: 7, delta: 4, matching: false, a (11): [0, 2, 5, 8, 9], b (4): [0, 1, 2, 5, 6, 7, 8]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], b (3): [0, 3, 4, 7, 8, 9, 10]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 2, 5, 7, 10], b (9): [0, 2, 3, 4, 5, 7, 8, 9]
+idx: 8, delta: 2, matching: false, a (10): [0, 3, 4, 7], b (7): [3, 4]
+idx: 8, delta: 3, matching: false, a (11): [0, 2, 5, 8, 9], b (6): [8]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], b (5): [1, 2, 5, 6, 8, 9, 10]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 2, 3, 4, 5, 7, 8, 9], b (10): [0, 3, 4, 7]
+idx: 9, delta: 2, matching: false, a (11): [0, 2, 5, 8, 9], b (8): [0, 2, 5, 7, 10]
+idx: 9, delta: 3, matching: false, a (12): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], b (7): [3, 4]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 3, 4, 7], b (11): [0, 2, 5, 8, 9]
+idx: 10, delta: 2, matching: false, a (12): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], b (9): [0, 2, 3, 4, 5, 7, 8, 9]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 2, 5, 8, 9], b (12): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+idx: 11 --- EXITING WITH false
+idx: 12 --- EXITING WITH false
+.##..##.###
+.##..##.###
+#..##..#.##
+#..##..####
+###..####..
+.##..##.###
+........#..
+...##......
+#.#..#.#..#
+#.####.###.
+#..##..#...
+#.#..#..##.
+##########.
+4 (vert: 4, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 2, 5, 7, 8, 10], b (1): [0, 2, 5, 7, 8, 9, 10]
+idx: 0, delta: 0 --- found smudge!
+idx: 0 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 4, 5, 6, 7, 8, 9, 11, 14], b (1): [3, 5, 7, 9, 13]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [3, 5, 7, 9, 13], b (2): [0, 1, 4, 5, 7, 9, 11, 13, 14]
+idx: 1, delta: 2, matching: false, a (3): [5, 6, 7, 10, 11, 13], b (0): [0, 1, 4, 5, 6, 7, 8, 9, 11, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 4, 5, 7, 9, 11, 13, 14], b (3): [5, 6, 7, 10, 11, 13]
+idx: 2, delta: 2, matching: false, a (4): [5, 6, 7, 10, 11, 13], b (1): [3, 5, 7, 9, 13]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 4, 5, 7, 9, 11, 13, 14], b (0): [0, 1, 4, 5, 6, 7, 8, 9, 11, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: true, a (3): [5, 6, 7, 10, 11, 13], b (4): [5, 6, 7, 10, 11, 13]
+idx: 3, delta: 2, matching: true, a (5): [0, 1, 4, 5, 7, 9, 11, 13, 14], b (2): [0, 1, 4, 5, 7, 9, 11, 13, 14]
+idx: 3, delta: 3, matching: true, a (6): [3, 5, 7, 9, 13], b (1): [3, 5, 7, 9, 13]
+idx: 3, delta: 4, matching: true, a (7): [0, 1, 4, 5, 6, 7, 8, 9, 11, 14], b (0): [0, 1, 4, 5, 6, 7, 8, 9, 11, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [5, 6, 7, 10, 11, 13], b (5): [0, 1, 4, 5, 7, 9, 11, 13, 14]
+idx: 4, delta: 2, matching: false, a (6): [3, 5, 7, 9, 13], b (3): [5, 6, 7, 10, 11, 13]
+idx: 4, delta: 3, matching: false, a (7): [0, 1, 4, 5, 6, 7, 8, 9, 11, 14], b (2): [0, 1, 4, 5, 7, 9, 11, 13, 14]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 3, 5, 6, 10, 11, 12, 14], b (1): [3, 5, 7, 9, 13]
+idx: 4, delta: 5, matching: false, a (9): [1, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14], b (0): [0, 1, 4, 5, 6, 7, 8, 9, 11, 14]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 4, 5, 7, 9, 11, 13, 14], b (6): [3, 5, 7, 9, 13]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 4, 5, 6, 7, 8, 9, 11, 14], b (4): [5, 6, 7, 10, 11, 13]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 3, 5, 6, 10, 11, 12, 14], b (3): [5, 6, 7, 10, 11, 13]
+idx: 5, delta: 4, matching: false, a (9): [1, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14], b (2): [0, 1, 4, 5, 7, 9, 11, 13, 14]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 2, 4, 6, 14], b (1): [3, 5, 7, 9, 13]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [3, 5, 7, 9, 13], b (7): [0, 1, 4, 5, 6, 7, 8, 9, 11, 14]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 3, 5, 6, 10, 11, 12, 14], b (5): [0, 1, 4, 5, 7, 9, 11, 13, 14]
+idx: 6, delta: 3, matching: false, a (9): [1, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14], b (4): [5, 6, 7, 10, 11, 13]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 2, 4, 6, 14], b (3): [5, 6, 7, 10, 11, 13]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 4, 5, 6, 7, 8, 9, 11, 14], b (8): [0, 1, 3, 5, 6, 10, 11, 12, 14]
+idx: 7, delta: 2, matching: false, a (9): [1, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14], b (6): [3, 5, 7, 9, 13]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 2, 4, 6, 14], b (5): [0, 1, 4, 5, 7, 9, 11, 13, 14]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 3, 5, 6, 10, 11, 12, 14], b (9): [1, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 2, 4, 6, 14], b (7): [0, 1, 4, 5, 6, 7, 8, 9, 11, 14]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14], b (10): [0, 1, 2, 4, 6, 14]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+##..######.#..#
+...#.#.#.#...#.
+##..##.#.#.#.##
+.....###..##.#.
+.....###..##.#.
+##..##.#.#.#.##
+...#.#.#.#...#.
+##..######.#..#
+##.#.##...###.#
+.#.##.####.####
+###.#.#.......#
+1 (vert: 1, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 3, 4, 5, 6, 7, 8, 9, 10], b (1): [0, 1, 2, 4, 7, 9, 10, 11, 12, 13]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 4, 7, 9, 10, 11, 12, 13], b (2): [0, 11, 13, 15]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 9, 11, 12, 14, 16], b (0): [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 11, 13, 15], b (3): [0, 2, 9, 11, 12, 14, 16]
+idx: 2, delta: 2, matching: false, a (4): [1, 5, 6, 10, 12, 14, 16], b (1): [0, 1, 2, 4, 7, 9, 10, 11, 12, 13]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 5, 6, 10, 11, 12, 13, 15], b (0): [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 9, 11, 12, 14, 16], b (4): [1, 5, 6, 10, 12, 14, 16]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 5, 6, 10, 11, 12, 13, 15], b (2): [0, 11, 13, 15]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 5, 6, 10, 11, 13, 15], b (1): [0, 1, 2, 4, 7, 9, 10, 11, 12, 13]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 5, 6, 10, 12, 14, 16], b (5): [0, 1, 5, 6, 10, 11, 12, 13, 15]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 5, 6, 10, 11, 13, 15], b (3): [0, 2, 9, 11, 12, 14, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 5, 6, 10, 11, 12, 13, 15], b (6): [0, 1, 5, 6, 10, 11, 13, 15]
+idx: 5, delta: 0 --- found smudge!
+idx: 5 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 3, 5, 6], b (1): [0, 1, 4, 5, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 4, 5, 6], b (2): [0, 1, 3]
+idx: 1, delta: 2, matching: false, a (3): [0], b (0): [1, 2, 3, 5, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 3], b (3): [0]
+idx: 2, delta: 2, matching: false, a (4): [0, 1], b (1): [0, 1, 4, 5, 6]
+idx: 2, delta: 3, matching: false, a (5): [0, 4, 5, 6], b (0): [1, 2, 3, 5, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0], b (4): [0, 1]
+idx: 3, delta: 0 --- found smudge!
+idx: 3, delta: 2, matching: false, a (5): [0, 4, 5, 6], b (2): [0, 1, 3]
+idx: 3, delta: 2 --- found smudge twice!
+idx: 4, delta: 0, matching: false, a (4): [0, 1], b (5): [0, 4, 5, 6]
+idx: 4, delta: 2, matching: false, a (6): [0, 4, 5, 6], b (3): [0]
+idx: 4, delta: 3, matching: false, a (7): [0, 1], b (2): [0, 1, 3]
+idx: 4, delta: 3 --- found smudge!
+idx: 4, delta: 4, matching: false, a (8): [0], b (1): [0, 1, 4, 5, 6]
+idx: 4, delta: 4 --- found smudge twice!
+idx: 5, delta: 0, matching: true, a (5): [0, 4, 5, 6], b (6): [0, 4, 5, 6]
+idx: 5, delta: 2, matching: true, a (7): [0, 1], b (4): [0, 1]
+idx: 5, delta: 3, matching: true, a (8): [0], b (3): [0]
+idx: 5, delta: 4, matching: true, a (9): [0, 1, 3], b (2): [0, 1, 3]
+idx: 5, delta: 5, matching: true, a (10): [0, 1, 4, 5, 6], b (1): [0, 1, 4, 5, 6]
+idx: 5, delta: 6, matching: true, a (11): [1, 2, 3, 5, 6], b (0): [1, 2, 3, 5, 6]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 4, 5, 6], b (7): [0, 1]
+idx: 6, delta: 2, matching: false, a (8): [0], b (5): [0, 4, 5, 6]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 3], b (4): [0, 1]
+idx: 6, delta: 3 --- found smudge!
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 4, 5, 6], b (3): [0]
+idx: 6, delta: 4 --- found smudge twice!
+idx: 7, delta: 0, matching: false, a (7): [0, 1], b (8): [0]
+idx: 7, delta: 0 --- found smudge!
+idx: 7, delta: 2, matching: false, a (9): [0, 1, 3], b (6): [0, 4, 5, 6]
+idx: 7, delta: 2 --- found smudge twice!
+idx: 8, delta: 0, matching: false, a (8): [0], b (9): [0, 1, 3]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 4, 5, 6], b (7): [0, 1]
+idx: 8, delta: 3, matching: false, a (11): [1, 2, 3, 5, 6], b (6): [0, 4, 5, 6]
+idx: 8, delta: 4, matching: false, a (12): [1, 3, 4, 5], b (5): [0, 4, 5, 6]
+idx: 8, delta: 5, matching: false, a (13): [1, 2, 5, 6], b (4): [0, 1]
+idx: 8, delta: 6, matching: false, a (14): [3, 4], b (3): [0]
+idx: 8, delta: 7, matching: false, a (15): [2, 5, 6], b (2): [0, 1, 3]
+idx: 8, delta: 8, matching: false, a (16): [3, 4], b (1): [0, 1, 4, 5, 6]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 3], b (10): [0, 1, 4, 5, 6]
+idx: 9, delta: 2, matching: false, a (11): [1, 2, 3, 5, 6], b (8): [0]
+idx: 9, delta: 3, matching: false, a (12): [1, 3, 4, 5], b (7): [0, 1]
+idx: 9, delta: 4, matching: false, a (13): [1, 2, 5, 6], b (6): [0, 4, 5, 6]
+idx: 9, delta: 5, matching: false, a (14): [3, 4], b (5): [0, 4, 5, 6]
+idx: 9, delta: 6, matching: false, a (15): [2, 5, 6], b (4): [0, 1]
+idx: 9, delta: 7, matching: false, a (16): [3, 4], b (3): [0]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 4, 5, 6], b (11): [1, 2, 3, 5, 6]
+idx: 10, delta: 2, matching: false, a (12): [1, 3, 4, 5], b (9): [0, 1, 3]
+idx: 10, delta: 3, matching: false, a (13): [1, 2, 5, 6], b (8): [0]
+idx: 10, delta: 4, matching: false, a (14): [3, 4], b (7): [0, 1]
+idx: 10, delta: 5, matching: false, a (15): [2, 5, 6], b (6): [0, 4, 5, 6]
+idx: 10, delta: 6, matching: false, a (16): [3, 4], b (5): [0, 4, 5, 6]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [1, 2, 3, 5, 6], b (12): [1, 3, 4, 5]
+idx: 11, delta: 2, matching: false, a (13): [1, 2, 5, 6], b (10): [0, 1, 4, 5, 6]
+idx: 11, delta: 3, matching: false, a (14): [3, 4], b (9): [0, 1, 3]
+idx: 11, delta: 4, matching: false, a (15): [2, 5, 6], b (8): [0]
+idx: 11, delta: 5, matching: false, a (16): [3, 4], b (7): [0, 1]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [1, 3, 4, 5], b (13): [1, 2, 5, 6]
+idx: 12, delta: 2, matching: false, a (14): [3, 4], b (11): [1, 2, 3, 5, 6]
+idx: 12, delta: 3, matching: false, a (15): [2, 5, 6], b (10): [0, 1, 4, 5, 6]
+idx: 12, delta: 4, matching: false, a (16): [3, 4], b (9): [0, 1, 3]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [1, 2, 5, 6], b (14): [3, 4]
+idx: 13, delta: 2, matching: false, a (15): [2, 5, 6], b (12): [1, 3, 4, 5]
+idx: 13, delta: 3, matching: false, a (16): [3, 4], b (11): [1, 2, 3, 5, 6]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [3, 4], b (15): [2, 5, 6]
+idx: 14, delta: 2, matching: false, a (16): [3, 4], b (13): [1, 2, 5, 6]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: false, a (15): [2, 5, 6], b (16): [3, 4]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+.###.##
+##..###
+##.#...
+#......
+##.....
+#...###
+#...###
+##.....
+#......
+##.#...
+##..###
+.###.##
+.#.###.
+.##..##
+...##..
+..#..##
+...##..
+6 (vert: 6, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [3, 4, 5, 6, 7, 12], b (1): [0, 1, 3, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 3, 12], b (2): [0, 1, 3, 4, 6, 7, 8, 11, 12]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 4, 6, 7, 8, 9, 10, 11, 12], b (0): [3, 4, 5, 6, 7, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 3, 4, 6, 7, 8, 11, 12], b (3): [0, 1, 4, 6, 7, 8, 9, 10, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 3, 4, 5], b (1): [0, 1, 3, 12]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 4, 8, 9, 10, 11], b (0): [3, 4, 5, 6, 7, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 4, 6, 7, 8, 9, 10, 11, 12], b (4): [0, 1, 3, 4, 5]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 4, 8, 9, 10, 11], b (2): [0, 1, 3, 4, 6, 7, 8, 11, 12]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 3, 7, 8, 11, 12], b (1): [0, 1, 3, 12]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 3, 4, 5], b (5): [0, 1, 2, 4, 8, 9, 10, 11]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 3, 7, 8, 11, 12], b (3): [0, 1, 4, 6, 7, 8, 9, 10, 11, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 4, 8, 9, 10, 11], b (6): [0, 1, 2, 3, 7, 8, 11, 12]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+idx: 0, delta: 0, matching: true, a (0): [1, 2, 3, 4, 5, 6], b (1): [1, 2, 3, 4, 5, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 3, 4, 5, 6], b (2): [5, 6]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 4, 6], b (0): [1, 2, 3, 4, 5, 6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [5, 6], b (3): [0, 1, 2, 4, 6]
+idx: 2, delta: 2, matching: false, a (4): [0, 2, 3, 4, 5], b (1): [1, 2, 3, 4, 5, 6]
+idx: 2, delta: 3, matching: false, a (5): [0, 4], b (0): [1, 2, 3, 4, 5, 6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 4, 6], b (4): [0, 2, 3, 4, 5]
+idx: 3, delta: 2, matching: false, a (5): [0, 4], b (2): [5, 6]
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 3], b (1): [1, 2, 3, 4, 5, 6]
+idx: 3, delta: 4, matching: false, a (7): [0, 2, 3, 6], b (0): [1, 2, 3, 4, 5, 6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 2, 3, 4, 5], b (5): [0, 4]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 3], b (3): [0, 1, 2, 4, 6]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 3, 6], b (2): [5, 6]
+idx: 4, delta: 4, matching: false, a (8): [2, 3, 5, 6], b (1): [1, 2, 3, 4, 5, 6]
+idx: 4, delta: 5, matching: false, a (9): [3, 5], b (0): [1, 2, 3, 4, 5, 6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 4], b (6): [0, 2, 3]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 3, 6], b (4): [0, 2, 3, 4, 5]
+idx: 5, delta: 3, matching: false, a (8): [2, 3, 5, 6], b (3): [0, 1, 2, 4, 6]
+idx: 5, delta: 4, matching: false, a (9): [3, 5], b (2): [5, 6]
+idx: 5, delta: 5, matching: false, a (10): [3, 5], b (1): [1, 2, 3, 4, 5, 6]
+idx: 5, delta: 6, matching: false, a (11): [2, 3, 5, 6], b (0): [1, 2, 3, 4, 5, 6]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 2, 3], b (7): [0, 2, 3, 6]
+idx: 6, delta: 0 --- found smudge!
+idx: 6, delta: 2, matching: false, a (8): [2, 3, 5, 6], b (5): [0, 4]
+idx: 6, delta: 2 --- found smudge twice!
+idx: 7, delta: 0, matching: false, a (7): [0, 2, 3, 6], b (8): [2, 3, 5, 6]
+idx: 7, delta: 2, matching: false, a (9): [3, 5], b (6): [0, 2, 3]
+idx: 7, delta: 3, matching: false, a (10): [3, 5], b (5): [0, 4]
+idx: 7, delta: 4, matching: false, a (11): [2, 3, 5, 6], b (4): [0, 2, 3, 4, 5]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 2, 3, 6], b (3): [0, 1, 2, 4, 6]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [2, 3, 5, 6], b (9): [3, 5]
+idx: 8, delta: 2, matching: false, a (10): [3, 5], b (7): [0, 2, 3, 6]
+idx: 8, delta: 3, matching: false, a (11): [2, 3, 5, 6], b (6): [0, 2, 3]
+idx: 8, delta: 4, matching: false, a (12): [0, 1, 2, 3, 6], b (5): [0, 4]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: true, a (9): [3, 5], b (10): [3, 5]
+idx: 9, delta: 2, matching: true, a (11): [2, 3, 5, 6], b (8): [2, 3, 5, 6]
+idx: 9, delta: 3, matching: false, a (12): [0, 1, 2, 3, 6], b (7): [0, 2, 3, 6]
+idx: 9, delta: 3 --- found smudge!
+idx: 9 --- EXITING WITH true
+.######
+.######
+.....##
+###.#.#
+#.####.
+#...#..
+#.##...
+#.##..#
+..##.##
+...#.#.
+...#.#.
+..##.##
+####..#
+1000 (vert: 0, horiz: 10)
+
+idx: 0, delta: 0, matching: false, a (0): [2, 5, 8], b (1): [2, 3, 6, 7]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 3, 6, 7], b (2): [2, 4, 5, 6, 7, 8]
+idx: 1, delta: 2, matching: false, a (3): [2, 3, 4, 5, 8], b (0): [2, 5, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [2, 4, 5, 6, 7, 8], b (3): [2, 3, 4, 5, 8]
+idx: 2, delta: 2, matching: false, a (4): [3, 6], b (1): [2, 3, 6, 7]
+idx: 2, delta: 3, matching: false, a (5): [2, 6, 7], b (0): [2, 5, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [2, 3, 4, 5, 8], b (4): [3, 6]
+idx: 3, delta: 2, matching: false, a (5): [2, 6, 7], b (2): [2, 4, 5, 6, 7, 8]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 3, 5, 6, 7, 8], b (1): [2, 3, 6, 7]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [3, 6], b (5): [2, 6, 7]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 3, 5, 6, 7, 8], b (3): [2, 3, 4, 5, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 6, 7], b (6): [0, 1, 3, 5, 6, 7, 8]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+idx: 0, delta: 0, matching: true, a (0): [6], b (1): [6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [6], b (2): [0, 1, 2, 3, 5]
+idx: 1, delta: 2, matching: false, a (3): [1, 3, 4, 6], b (0): [6]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 5], b (3): [1, 3, 4, 6]
+idx: 2, delta: 2, matching: false, a (4): [2, 3], b (1): [6]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 6], b (0): [6]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 3, 4, 6], b (4): [2, 3]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 6], b (2): [0, 1, 2, 3, 5]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 4, 5, 6], b (1): [6]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 5, 6], b (0): [6]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 3], b (5): [0, 2, 3, 6]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 4, 5, 6], b (3): [1, 3, 4, 6]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 5, 6], b (2): [0, 1, 2, 3, 5]
+idx: 4, delta: 4, matching: false, a (8): [0, 2, 3, 6], b (1): [6]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 3, 6], b (6): [1, 2, 4, 5, 6]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 5, 6], b (4): [2, 3]
+idx: 5, delta: 3, matching: false, a (8): [0, 2, 3, 6], b (3): [1, 3, 4, 6]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 4, 5, 6], b (7): [1, 2, 5, 6]
+idx: 6, delta: 0 --- found smudge!
+idx: 6, delta: 2, matching: true, a (8): [0, 2, 3, 6], b (5): [0, 2, 3, 6]
+idx: 6 --- EXITING WITH true
+......#
+......#
+####.#.
+.#.##.#
+..##...
+#.##..#
+.##.###
+.##..##
+#.##..#
+700 (vert: 0, horiz: 7)
+
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 3, 4, 6, 8], b (1): [1, 4, 8, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 4, 8, 9], b (2): [0, 1, 2, 3, 4, 5, 8]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 3, 5, 6, 7, 9], b (0): [1, 2, 3, 4, 6, 8]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 4, 5, 8], b (3): [0, 2, 3, 5, 6, 7, 9]
+idx: 2, delta: 2, matching: false, a (4): [2, 3, 6], b (1): [1, 4, 8, 9]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 3, 4, 5, 6, 9], b (0): [1, 2, 3, 4, 6, 8]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 3, 5, 6, 7, 9], b (4): [2, 3, 6]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 3, 4, 5, 6, 9], b (2): [0, 1, 2, 3, 4, 5, 8]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 3, 4, 5, 7, 10], b (1): [1, 4, 8, 9]
+idx: 3, delta: 4, matching: false, a (7): [1, 4, 9], b (0): [1, 2, 3, 4, 6, 8]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [2, 3, 6], b (5): [0, 1, 2, 3, 4, 5, 6, 9]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 3, 4, 5, 7, 10], b (3): [0, 2, 3, 5, 6, 7, 9]
+idx: 4, delta: 3, matching: false, a (7): [1, 4, 9], b (2): [0, 1, 2, 3, 4, 5, 8]
+idx: 4, delta: 4, matching: false, a (8): [1, 4, 7], b (1): [1, 4, 8, 9]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 2, 3, 4, 5, 7, 10], b (0): [1, 2, 3, 4, 6, 8]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 3, 4, 5, 6, 9], b (6): [0, 1, 2, 3, 4, 5, 7, 10]
+idx: 5, delta: 2, matching: false, a (7): [1, 4, 9], b (4): [2, 3, 6]
+idx: 5, delta: 3, matching: false, a (8): [1, 4, 7], b (3): [0, 2, 3, 5, 6, 7, 9]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 2, 3, 4, 5, 7, 10], b (2): [0, 1, 2, 3, 4, 5, 8]
+idx: 5, delta: 5, matching: false, a (10): [0, 1, 2, 3, 4, 5, 7], b (1): [1, 4, 8, 9]
+idx: 5, delta: 6, matching: false, a (11): [1, 4, 7, 8, 10], b (0): [1, 2, 3, 4, 6, 8]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 1, 2, 3, 4, 5, 7, 10], b (7): [1, 4, 9]
+idx: 6, delta: 2, matching: false, a (8): [1, 4, 7], b (5): [0, 1, 2, 3, 4, 5, 6, 9]
+idx: 6, delta: 3, matching: false, a (9): [0, 1, 2, 3, 4, 5, 7, 10], b (4): [2, 3, 6]
+idx: 6, delta: 4, matching: false, a (10): [0, 1, 2, 3, 4, 5, 7], b (3): [0, 2, 3, 5, 6, 7, 9]
+idx: 6, delta: 5, matching: false, a (11): [1, 4, 7, 8, 10], b (2): [0, 1, 2, 3, 4, 5, 8]
+idx: 6, delta: 6, matching: false, a (12): [1, 4, 7, 8, 9, 10], b (1): [1, 4, 8, 9]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 4, 9], b (8): [1, 4, 7]
+idx: 7, delta: 2, matching: true, a (9): [0, 1, 2, 3, 4, 5, 7, 10], b (6): [0, 1, 2, 3, 4, 5, 7, 10]
+idx: 7, delta: 3, matching: false, a (10): [0, 1, 2, 3, 4, 5, 7], b (5): [0, 1, 2, 3, 4, 5, 6, 9]
+idx: 7, delta: 4, matching: false, a (11): [1, 4, 7, 8, 10], b (4): [2, 3, 6]
+idx: 7, delta: 5, matching: false, a (12): [1, 4, 7, 8, 9, 10], b (3): [0, 2, 3, 5, 6, 7, 9]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [1, 4, 7], b (9): [0, 1, 2, 3, 4, 5, 7, 10]
+idx: 8, delta: 2, matching: false, a (10): [0, 1, 2, 3, 4, 5, 7], b (7): [1, 4, 9]
+idx: 8, delta: 3, matching: false, a (11): [1, 4, 7, 8, 10], b (6): [0, 1, 2, 3, 4, 5, 7, 10]
+idx: 8, delta: 4, matching: false, a (12): [1, 4, 7, 8, 9, 10], b (5): [0, 1, 2, 3, 4, 5, 6, 9]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 1, 2, 3, 4, 5, 7, 10], b (10): [0, 1, 2, 3, 4, 5, 7]
+idx: 9, delta: 0 --- found smudge!
+idx: 9, delta: 2, matching: false, a (11): [1, 4, 7, 8, 10], b (8): [1, 4, 7]
+idx: 9, delta: 2 --- found smudge twice!
+idx: 10, delta: 0, matching: false, a (10): [0, 1, 2, 3, 4, 5, 7], b (11): [1, 4, 7, 8, 10]
+idx: 10, delta: 2, matching: false, a (12): [1, 4, 7, 8, 9, 10], b (9): [0, 1, 2, 3, 4, 5, 7, 10]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [1, 4, 7, 8, 10], b (12): [1, 4, 7, 8, 9, 10]
+idx: 11, delta: 0 --- found smudge!
+idx: 11 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [2, 3, 5, 6, 9, 10], b (1): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12], b (2): [0, 2, 3, 4, 5, 6, 9, 10]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 3, 4, 5, 6, 9, 10], b (0): [2, 3, 5, 6, 9, 10]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: true, a (2): [0, 2, 3, 4, 5, 6, 9, 10], b (3): [0, 2, 3, 4, 5, 6, 9, 10]
+idx: 2, delta: 2, matching: true, a (4): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12], b (1): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12]
+idx: 2, delta: 3, matching: true, a (5): [2, 3, 5, 6, 9, 10], b (0): [2, 3, 5, 6, 9, 10]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 3, 4, 5, 6, 9, 10], b (4): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [2, 3, 5, 6, 9, 10], b (2): [0, 2, 3, 4, 5, 6, 9, 10]
+idx: 3, delta: 3, matching: false, a (6): [0, 3, 4, 5], b (1): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12]
+idx: 3, delta: 4, matching: false, a (7): [3, 6, 8, 9, 10, 11, 12], b (0): [2, 3, 5, 6, 9, 10]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12], b (5): [2, 3, 5, 6, 9, 10]
+idx: 4, delta: 2, matching: false, a (6): [0, 3, 4, 5], b (3): [0, 2, 3, 4, 5, 6, 9, 10]
+idx: 4, delta: 3, matching: false, a (7): [3, 6, 8, 9, 10, 11, 12], b (2): [0, 2, 3, 4, 5, 6, 9, 10]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 11, 12], b (1): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12]
+idx: 4, delta: 5, matching: false, a (9): [1, 3, 5, 7, 12], b (0): [2, 3, 5, 6, 9, 10]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 3, 5, 6, 9, 10], b (6): [0, 3, 4, 5]
+idx: 5, delta: 2, matching: false, a (7): [3, 6, 8, 9, 10, 11, 12], b (4): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 11, 12], b (3): [0, 2, 3, 4, 5, 6, 9, 10]
+idx: 5, delta: 4, matching: false, a (9): [1, 3, 5, 7, 12], b (2): [0, 2, 3, 4, 5, 6, 9, 10]
+idx: 5, delta: 5, matching: false, a (10): [6, 9, 11, 12], b (1): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 3, 4, 5], b (7): [3, 6, 8, 9, 10, 11, 12]
+idx: 6, delta: 2, matching: false, a (8): [0, 1, 2, 11, 12], b (5): [2, 3, 5, 6, 9, 10]
+idx: 6, delta: 3, matching: false, a (9): [1, 3, 5, 7, 12], b (4): [0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12]
+idx: 6, delta: 4, matching: false, a (10): [6, 9, 11, 12], b (3): [0, 2, 3, 4, 5, 6, 9, 10]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [3, 6, 8, 9, 10, 11, 12], b (8): [0, 1, 2, 11, 12]
+idx: 7, delta: 2, matching: false, a (9): [1, 3, 5, 7, 12], b (6): [0, 3, 4, 5]
+idx: 7, delta: 3, matching: false, a (10): [6, 9, 11, 12], b (5): [2, 3, 5, 6, 9, 10]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [0, 1, 2, 11, 12], b (9): [1, 3, 5, 7, 12]
+idx: 8, delta: 2, matching: false, a (10): [6, 9, 11, 12], b (7): [3, 6, 8, 9, 10, 11, 12]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 3, 5, 7, 12], b (10): [6, 9, 11, 12]
+idx: 9 --- EXITING WITH false
+idx: 10 --- EXITING WITH false
+..##.##..##..
+###..########
+#.#####..##..
+#.#####..##..
+###..########
+..##.##..##..
+#..###.......
+...#..#.#####
+###........##
+.#.#.#.#....#
+......#..#.##
+12 (vert: 12, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [2, 3, 5], b (1): [2, 6]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 6], b (2): [0, 1, 2, 3, 5, 6]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 3, 5, 6], b (0): [2, 3, 5]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 5, 6], b (3): [0, 1, 3, 5, 6]
+idx: 2, delta: 0 --- found smudge!
+idx: 2, delta: 2, matching: true, a (4): [2, 6], b (1): [2, 6]
+idx: 2, delta: 3, matching: true, a (5): [2, 3, 5], b (0): [2, 3, 5]
+idx: 2 --- EXITING WITH true
+idx: 0, delta: 0, matching: true, a (0): [2, 3, 8, 15, 16], b (1): [2, 3, 8, 15, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 3, 8, 15, 16], b (2): [0, 1, 2, 4, 5, 6, 7, 10, 11, 12, 14, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 3, 5, 6, 8, 9, 10, 12, 14, 15], b (0): [2, 3, 8, 15, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 4, 5, 6, 7, 10, 11, 12, 14, 15, 16], b (3): [0, 2, 3, 5, 6, 8, 9, 10, 12, 14, 15]
+idx: 2, delta: 2, matching: false, a (4): [6, 7, 9, 10, 11, 12, 16], b (1): [2, 3, 8, 15, 16]
+idx: 2, delta: 3, matching: false, a (5): [0, 2, 3, 5, 6, 7, 11, 12, 13, 14, 15, 16], b (0): [2, 3, 8, 15, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 3, 5, 6, 8, 9, 10, 12, 14, 15], b (4): [6, 7, 9, 10, 11, 12, 16]
+idx: 3, delta: 2, matching: false, a (5): [0, 2, 3, 5, 6, 7, 11, 12, 13, 14, 15, 16], b (2): [0, 1, 2, 4, 5, 6, 7, 10, 11, 12, 14, 15, 16]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 3, 4, 6, 7, 8, 10, 14, 15, 16], b (1): [2, 3, 8, 15, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [6, 7, 9, 10, 11, 12, 16], b (5): [0, 2, 3, 5, 6, 7, 11, 12, 13, 14, 15, 16]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 3, 4, 6, 7, 8, 10, 14, 15, 16], b (3): [0, 2, 3, 5, 6, 8, 9, 10, 12, 14, 15]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 2, 3, 5, 6, 7, 11, 12, 13, 14, 15, 16], b (6): [1, 2, 3, 4, 6, 7, 8, 10, 14, 15, 16]
+idx: 5 --- EXITING WITH false
+idx: 6 --- EXITING WITH false
+..##....#......##
+..##....#......##
+###.####..###.###
+#.##.##.###.#.##.
+......##.####...#
+#.##.###...######
+.####.###.#...###
+3 (vert: 3, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [0], b (1): [0, 1, 2, 4]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 1, 2, 4], b (2): [0, 1, 4, 5, 6]
+idx: 1, delta: 2, matching: false, a (3): [4, 5, 6], b (0): [0]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 4, 5, 6], b (3): [4, 5, 6]
+idx: 2, delta: 2, matching: false, a (4): [3, 4, 5, 6], b (1): [0, 1, 2, 4]
+idx: 2, delta: 3, matching: false, a (5): [3, 5, 6], b (0): [0]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [4, 5, 6], b (4): [3, 4, 5, 6]
+idx: 3, delta: 0 --- found smudge!
+idx: 3, delta: 2, matching: false, a (5): [3, 5, 6], b (2): [0, 1, 4, 5, 6]
+idx: 3, delta: 2 --- found smudge twice!
+idx: 4, delta: 0, matching: false, a (4): [3, 4, 5, 6], b (5): [3, 5, 6]
+idx: 4, delta: 0 --- found smudge!
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 3, 4], b (3): [4, 5, 6]
+idx: 4, delta: 2 --- found smudge twice!
+idx: 5, delta: 0, matching: false, a (5): [3, 5, 6], b (6): [0, 1, 2, 3, 4]
+idx: 5, delta: 2, matching: false, a (7): [0, 1, 2, 3, 4], b (4): [3, 4, 5, 6]
+idx: 5, delta: 3, matching: false, a (8): [3, 5, 6], b (3): [4, 5, 6]
+idx: 5, delta: 4, matching: false, a (9): [3, 4, 5, 6], b (2): [0, 1, 4, 5, 6]
+idx: 5, delta: 5, matching: false, a (10): [4, 5, 6], b (1): [0, 1, 2, 4]
+idx: 5, delta: 6, matching: false, a (11): [0, 1, 4, 5, 6], b (0): [0]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: true, a (6): [0, 1, 2, 3, 4], b (7): [0, 1, 2, 3, 4]
+idx: 6, delta: 2, matching: true, a (8): [3, 5, 6], b (5): [3, 5, 6]
+idx: 6, delta: 3, matching: true, a (9): [3, 4, 5, 6], b (4): [3, 4, 5, 6]
+idx: 6, delta: 4, matching: true, a (10): [4, 5, 6], b (3): [4, 5, 6]
+idx: 6, delta: 5, matching: true, a (11): [0, 1, 4, 5, 6], b (2): [0, 1, 4, 5, 6]
+idx: 6, delta: 6, matching: true, a (12): [0, 1, 2, 4], b (1): [0, 1, 2, 4]
+idx: 6, delta: 7, matching: true, a (13): [0], b (0): [0]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 1, 2, 3, 4], b (8): [3, 5, 6]
+idx: 7, delta: 2, matching: false, a (9): [3, 4, 5, 6], b (6): [0, 1, 2, 3, 4]
+idx: 7, delta: 3, matching: false, a (10): [4, 5, 6], b (5): [3, 5, 6]
+idx: 7, delta: 4, matching: false, a (11): [0, 1, 4, 5, 6], b (4): [3, 4, 5, 6]
+idx: 7, delta: 5, matching: false, a (12): [0, 1, 2, 4], b (3): [4, 5, 6]
+idx: 7, delta: 6, matching: false, a (13): [0], b (2): [0, 1, 4, 5, 6]
+idx: 7, delta: 7, matching: false, a (14): [0, 1, 4, 5], b (1): [0, 1, 2, 4]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [3, 5, 6], b (9): [3, 4, 5, 6]
+idx: 8, delta: 0 --- found smudge!
+idx: 8, delta: 2, matching: false, a (10): [4, 5, 6], b (7): [0, 1, 2, 3, 4]
+idx: 8, delta: 2 --- found smudge twice!
+idx: 9, delta: 0, matching: false, a (9): [3, 4, 5, 6], b (10): [4, 5, 6]
+idx: 9, delta: 0 --- found smudge!
+idx: 9, delta: 2, matching: false, a (11): [0, 1, 4, 5, 6], b (8): [3, 5, 6]
+idx: 9, delta: 2 --- found smudge twice!
+idx: 10, delta: 0, matching: false, a (10): [4, 5, 6], b (11): [0, 1, 4, 5, 6]
+idx: 10, delta: 2, matching: false, a (12): [0, 1, 2, 4], b (9): [3, 4, 5, 6]
+idx: 10, delta: 3, matching: false, a (13): [0], b (8): [3, 5, 6]
+idx: 10, delta: 4, matching: false, a (14): [0, 1, 4, 5], b (7): [0, 1, 2, 3, 4]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 1, 4, 5, 6], b (12): [0, 1, 2, 4]
+idx: 11, delta: 2, matching: false, a (13): [0], b (10): [4, 5, 6]
+idx: 11, delta: 3, matching: false, a (14): [0, 1, 4, 5], b (9): [3, 4, 5, 6]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 1, 2, 4], b (13): [0]
+idx: 12, delta: 2, matching: false, a (14): [0, 1, 4, 5], b (11): [0, 1, 4, 5, 6]
+idx: 12, delta: 2 --- found smudge!
+idx: 12 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 6, 7, 11, 12, 13, 14], b (1): [1, 2, 6, 7, 11, 12, 14]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [1, 2, 6, 7, 11, 12, 14], b (2): [1, 6, 7, 12]
+idx: 1, delta: 2, matching: false, a (3): [4, 5, 6, 7, 8, 9], b (0): [0, 1, 2, 6, 7, 11, 12, 13, 14]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [1, 6, 7, 12], b (3): [4, 5, 6, 7, 8, 9]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 14], b (1): [1, 2, 6, 7, 11, 12, 14]
+idx: 2, delta: 3, matching: false, a (5): [2, 3, 4, 5, 8, 9, 10, 11, 14], b (0): [0, 1, 2, 6, 7, 11, 12, 13, 14]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [4, 5, 6, 7, 8, 9], b (4): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 14]
+idx: 3, delta: 2, matching: false, a (5): [2, 3, 4, 5, 8, 9, 10, 11, 14], b (2): [1, 6, 7, 12]
+idx: 3, delta: 3, matching: false, a (6): [2, 3, 4, 5, 8, 9, 10, 11], b (1): [1, 2, 6, 7, 11, 12, 14]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 3, 4, 6, 7, 9, 10, 11, 12, 14], b (5): [2, 3, 4, 5, 8, 9, 10, 11, 14]
+idx: 4, delta: 2, matching: false, a (6): [2, 3, 4, 5, 8, 9, 10, 11], b (3): [4, 5, 6, 7, 8, 9]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [2, 3, 4, 5, 8, 9, 10, 11, 14], b (6): [2, 3, 4, 5, 8, 9, 10, 11]
+idx: 5, delta: 0 --- found smudge!
+idx: 5 --- EXITING WITH true
+###...##...####
+.##...##...##.#
+.#....##....#..
+....######.....
+.####.##.####.#
+..####..####..#
+..####..####...
+613 (vert: 13, horiz: 6)
+
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 6, 7, 11, 12, 13, 14, 16], b (1): [0, 3, 4, 9, 10, 13, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 3, 4, 9, 10, 13, 16], b (2): [0, 3, 4, 6, 7, 9, 10, 13]
+idx: 1, delta: 2, matching: false, a (3): [0, 2, 3, 5, 8, 10, 11, 13, 14, 15], b (0): [0, 1, 2, 6, 7, 11, 12, 13, 14, 16]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 4, 6, 7, 9, 10, 13], b (3): [0, 2, 3, 5, 8, 10, 11, 13, 14, 15]
+idx: 2, delta: 2, matching: false, a (4): [0, 1, 4, 6, 7, 9, 12, 13, 14, 15], b (1): [0, 3, 4, 9, 10, 13, 16]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (0): [0, 1, 2, 6, 7, 11, 12, 13, 14, 16]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 2, 3, 5, 8, 10, 11, 13, 14, 15], b (4): [0, 1, 4, 6, 7, 9, 12, 13, 14, 15]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (2): [0, 3, 4, 6, 7, 9, 10, 13]
+idx: 3, delta: 3, matching: false, a (6): [1, 2, 4, 5, 8, 9, 11, 12, 14, 15, 16], b (1): [0, 3, 4, 9, 10, 13, 16]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 4, 5, 8, 9, 11, 12, 15, 16], b (0): [0, 1, 2, 6, 7, 11, 12, 13, 14, 16]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 1, 4, 6, 7, 9, 12, 13, 14, 15], b (5): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16]
+idx: 4, delta: 2, matching: false, a (6): [1, 2, 4, 5, 8, 9, 11, 12, 14, 15, 16], b (3): [0, 2, 3, 5, 8, 10, 11, 13, 14, 15]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 4, 5, 8, 9, 11, 12, 15, 16], b (2): [0, 3, 4, 6, 7, 9, 10, 13]
+idx: 4, delta: 4, matching: false, a (8): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (1): [0, 3, 4, 9, 10, 13, 16]
+idx: 4, delta: 5, matching: false, a (9): [0, 1, 4, 6, 7, 9, 12, 13, 14, 15], b (0): [0, 1, 2, 6, 7, 11, 12, 13, 14, 16]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (6): [1, 2, 4, 5, 8, 9, 11, 12, 14, 15, 16]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 4, 5, 8, 9, 11, 12, 15, 16], b (4): [0, 1, 4, 6, 7, 9, 12, 13, 14, 15]
+idx: 5, delta: 3, matching: false, a (8): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (3): [0, 2, 3, 5, 8, 10, 11, 13, 14, 15]
+idx: 5, delta: 4, matching: false, a (9): [0, 1, 4, 6, 7, 9, 12, 13, 14, 15], b (2): [0, 3, 4, 6, 7, 9, 10, 13]
+idx: 5, delta: 5, matching: false, a (10): [0, 2, 3, 5, 8, 10, 11, 13, 14, 15], b (1): [0, 3, 4, 9, 10, 13, 16]
+idx: 5, delta: 6, matching: false, a (11): [0, 3, 4, 6, 7, 9, 10, 13], b (0): [0, 1, 2, 6, 7, 11, 12, 13, 14, 16]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [1, 2, 4, 5, 8, 9, 11, 12, 14, 15, 16], b (7): [1, 2, 4, 5, 8, 9, 11, 12, 15, 16]
+idx: 6, delta: 0 --- found smudge!
+idx: 6, delta: 2, matching: true, a (8): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16], b (5): [0, 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 16]
+idx: 6, delta: 3, matching: true, a (9): [0, 1, 4, 6, 7, 9, 12, 13, 14, 15], b (4): [0, 1, 4, 6, 7, 9, 12, 13, 14, 15]
+idx: 6, delta: 4, matching: true, a (10): [0, 2, 3, 5, 8, 10, 11, 13, 14, 15], b (3): [0, 2, 3, 5, 8, 10, 11, 13, 14, 15]
+idx: 6, delta: 5, matching: true, a (11): [0, 3, 4, 6, 7, 9, 10, 13], b (2): [0, 3, 4, 6, 7, 9, 10, 13]
+idx: 6, delta: 6, matching: true, a (12): [0, 3, 4, 9, 10, 13, 16], b (1): [0, 3, 4, 9, 10, 13, 16]
+idx: 6 --- EXITING WITH true
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12], b (1): [0, 4, 5, 6, 7, 8, 9]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 4, 5, 6, 7, 8, 9], b (2): [0, 3, 5, 6, 7, 8, 10]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 3, 10, 11, 12], b (0): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 3, 5, 6, 7, 8, 10], b (3): [1, 2, 3, 10, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [1, 2, 4, 6, 7, 9, 11, 12], b (1): [0, 4, 5, 6, 7, 8, 9]
+idx: 2, delta: 3, matching: false, a (5): [3, 5, 6, 7, 8, 10], b (0): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 3, 10, 11, 12], b (4): [1, 2, 4, 6, 7, 9, 11, 12]
+idx: 3, delta: 2, matching: false, a (5): [3, 5, 6, 7, 8, 10], b (2): [0, 3, 5, 6, 7, 8, 10]
+idx: 3, delta: 2 --- found smudge!
+idx: 3, delta: 3, matching: false, a (6): [0, 2, 4, 5, 8, 9, 11], b (1): [0, 4, 5, 6, 7, 8, 9]
+idx: 3, delta: 3 --- found smudge twice!
+idx: 4, delta: 0, matching: false, a (4): [1, 2, 4, 6, 7, 9, 11, 12], b (5): [3, 5, 6, 7, 8, 10]
+idx: 4, delta: 2, matching: false, a (6): [0, 2, 4, 5, 8, 9, 11], b (3): [1, 2, 3, 10, 11, 12]
+idx: 4, delta: 3, matching: false, a (7): [0, 2, 4, 5, 8, 9, 11], b (2): [0, 3, 5, 6, 7, 8, 10]
+idx: 4, delta: 4, matching: false, a (8): [3, 5, 6, 7, 8, 10], b (1): [0, 4, 5, 6, 7, 8, 9]
+idx: 4, delta: 5, matching: false, a (9): [1, 2, 4, 6, 7, 9, 11, 12], b (0): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [3, 5, 6, 7, 8, 10], b (6): [0, 2, 4, 5, 8, 9, 11]
+idx: 5, delta: 2, matching: false, a (7): [0, 2, 4, 5, 8, 9, 11], b (4): [1, 2, 4, 6, 7, 9, 11, 12]
+idx: 5, delta: 3, matching: false, a (8): [3, 5, 6, 7, 8, 10], b (3): [1, 2, 3, 10, 11, 12]
+idx: 5, delta: 4, matching: false, a (9): [1, 2, 4, 6, 7, 9, 11, 12], b (2): [0, 3, 5, 6, 7, 8, 10]
+idx: 5, delta: 5, matching: false, a (10): [1, 2, 3, 10, 11, 12], b (1): [0, 4, 5, 6, 7, 8, 9]
+idx: 5, delta: 6, matching: false, a (11): [0, 3, 5, 6, 7, 8, 10], b (0): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: true, a (6): [0, 2, 4, 5, 8, 9, 11], b (7): [0, 2, 4, 5, 8, 9, 11]
+idx: 6, delta: 2, matching: true, a (8): [3, 5, 6, 7, 8, 10], b (5): [3, 5, 6, 7, 8, 10]
+idx: 6, delta: 3, matching: true, a (9): [1, 2, 4, 6, 7, 9, 11, 12], b (4): [1, 2, 4, 6, 7, 9, 11, 12]
+idx: 6, delta: 4, matching: true, a (10): [1, 2, 3, 10, 11, 12], b (3): [1, 2, 3, 10, 11, 12]
+idx: 6, delta: 5, matching: true, a (11): [0, 3, 5, 6, 7, 8, 10], b (2): [0, 3, 5, 6, 7, 8, 10]
+idx: 6, delta: 6, matching: true, a (12): [0, 4, 5, 6, 7, 8, 9], b (1): [0, 4, 5, 6, 7, 8, 9]
+idx: 6, delta: 7, matching: true, a (13): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12], b (0): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [0, 2, 4, 5, 8, 9, 11], b (8): [3, 5, 6, 7, 8, 10]
+idx: 7, delta: 2, matching: false, a (9): [1, 2, 4, 6, 7, 9, 11, 12], b (6): [0, 2, 4, 5, 8, 9, 11]
+idx: 7, delta: 3, matching: false, a (10): [1, 2, 3, 10, 11, 12], b (5): [3, 5, 6, 7, 8, 10]
+idx: 7, delta: 4, matching: false, a (11): [0, 3, 5, 6, 7, 8, 10], b (4): [1, 2, 4, 6, 7, 9, 11, 12]
+idx: 7, delta: 5, matching: false, a (12): [0, 4, 5, 6, 7, 8, 9], b (3): [1, 2, 3, 10, 11, 12]
+idx: 7, delta: 6, matching: false, a (13): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12], b (2): [0, 3, 5, 6, 7, 8, 10]
+idx: 7, delta: 7, matching: false, a (14): [0, 3, 4, 5, 6, 8, 9, 10], b (1): [0, 4, 5, 6, 7, 8, 9]
+idx: 7, delta: 8, matching: false, a (15): [3, 4, 6, 7, 9, 10], b (0): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [3, 5, 6, 7, 8, 10], b (9): [1, 2, 4, 6, 7, 9, 11, 12]
+idx: 8, delta: 2, matching: false, a (10): [1, 2, 3, 10, 11, 12], b (7): [0, 2, 4, 5, 8, 9, 11]
+idx: 8, delta: 3, matching: false, a (11): [0, 3, 5, 6, 7, 8, 10], b (6): [0, 2, 4, 5, 8, 9, 11]
+idx: 8, delta: 4, matching: false, a (12): [0, 4, 5, 6, 7, 8, 9], b (5): [3, 5, 6, 7, 8, 10]
+idx: 8, delta: 5, matching: false, a (13): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12], b (4): [1, 2, 4, 6, 7, 9, 11, 12]
+idx: 8, delta: 6, matching: false, a (14): [0, 3, 4, 5, 6, 8, 9, 10], b (3): [1, 2, 3, 10, 11, 12]
+idx: 8, delta: 7, matching: false, a (15): [3, 4, 6, 7, 9, 10], b (2): [0, 3, 5, 6, 7, 8, 10]
+idx: 8, delta: 8, matching: false, a (16): [0, 1, 5, 6, 7, 8, 12], b (1): [0, 4, 5, 6, 7, 8, 9]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [1, 2, 4, 6, 7, 9, 11, 12], b (10): [1, 2, 3, 10, 11, 12]
+idx: 9, delta: 2, matching: false, a (11): [0, 3, 5, 6, 7, 8, 10], b (8): [3, 5, 6, 7, 8, 10]
+idx: 9, delta: 2 --- found smudge!
+idx: 9, delta: 3, matching: false, a (12): [0, 4, 5, 6, 7, 8, 9], b (7): [0, 2, 4, 5, 8, 9, 11]
+idx: 9, delta: 3 --- found smudge twice!
+idx: 10, delta: 0, matching: false, a (10): [1, 2, 3, 10, 11, 12], b (11): [0, 3, 5, 6, 7, 8, 10]
+idx: 10, delta: 2, matching: false, a (12): [0, 4, 5, 6, 7, 8, 9], b (9): [1, 2, 4, 6, 7, 9, 11, 12]
+idx: 10, delta: 3, matching: false, a (13): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12], b (8): [3, 5, 6, 7, 8, 10]
+idx: 10, delta: 4, matching: false, a (14): [0, 3, 4, 5, 6, 8, 9, 10], b (7): [0, 2, 4, 5, 8, 9, 11]
+idx: 10, delta: 5, matching: false, a (15): [3, 4, 6, 7, 9, 10], b (6): [0, 2, 4, 5, 8, 9, 11]
+idx: 10, delta: 6, matching: false, a (16): [0, 1, 5, 6, 7, 8, 12], b (5): [3, 5, 6, 7, 8, 10]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [0, 3, 5, 6, 7, 8, 10], b (12): [0, 4, 5, 6, 7, 8, 9]
+idx: 11, delta: 2, matching: false, a (13): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12], b (10): [1, 2, 3, 10, 11, 12]
+idx: 11, delta: 3, matching: false, a (14): [0, 3, 4, 5, 6, 8, 9, 10], b (9): [1, 2, 4, 6, 7, 9, 11, 12]
+idx: 11, delta: 4, matching: false, a (15): [3, 4, 6, 7, 9, 10], b (8): [3, 5, 6, 7, 8, 10]
+idx: 11, delta: 5, matching: false, a (16): [0, 1, 5, 6, 7, 8, 12], b (7): [0, 2, 4, 5, 8, 9, 11]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 4, 5, 6, 7, 8, 9], b (13): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12]
+idx: 12, delta: 2, matching: false, a (14): [0, 3, 4, 5, 6, 8, 9, 10], b (11): [0, 3, 5, 6, 7, 8, 10]
+idx: 12, delta: 3, matching: false, a (15): [3, 4, 6, 7, 9, 10], b (10): [1, 2, 3, 10, 11, 12]
+idx: 12, delta: 4, matching: false, a (16): [0, 1, 5, 6, 7, 8, 12], b (9): [1, 2, 4, 6, 7, 9, 11, 12]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12], b (14): [0, 3, 4, 5, 6, 8, 9, 10]
+idx: 13, delta: 2, matching: false, a (15): [3, 4, 6, 7, 9, 10], b (12): [0, 4, 5, 6, 7, 8, 9]
+idx: 13, delta: 3, matching: false, a (16): [0, 1, 5, 6, 7, 8, 12], b (11): [0, 3, 5, 6, 7, 8, 10]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [0, 3, 4, 5, 6, 8, 9, 10], b (15): [3, 4, 6, 7, 9, 10]
+idx: 14, delta: 2, matching: false, a (16): [0, 1, 5, 6, 7, 8, 12], b (13): [0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: false, a (15): [3, 4, 6, 7, 9, 10], b (16): [0, 1, 5, 6, 7, 8, 12]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+######..#####
+#...######...
+#..#.####.#..
+.###......###
+.##.#.##.#.##
+...#.####.#..
+#.#.##..##.#.
+#.#.##..##.#.
+...#.####.#..
+.##.#.##.#.##
+.###......###
+#..#.####.#..
+#...######...
+######..#####
+#..####.###..
+...##.##.##..
+##...####...#
+7 (vert: 7, horiz: 0)
+
+idx: 0, delta: 0, matching: false, a (0): [2, 6, 7, 11, 12, 15], b (1): [0, 2, 3, 6, 7, 9, 12, 15, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 2, 3, 6, 7, 9, 12, 15, 16], b (2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 14, 16]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 7, 8, 10, 11, 13, 14, 15], b (0): [2, 6, 7, 11, 12, 15]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 14, 16], b (3): [1, 2, 7, 8, 10, 11, 13, 14, 15]
+idx: 2, delta: 2, matching: false, a (4): [0, 4, 5, 9, 10, 12, 13, 15, 16], b (1): [0, 2, 3, 6, 7, 9, 12, 15, 16]
+idx: 2, delta: 3, matching: false, a (5): [0, 1, 4, 5, 8, 9, 11, 13, 15, 16], b (0): [2, 6, 7, 11, 12, 15]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 7, 8, 10, 11, 13, 14, 15], b (4): [0, 4, 5, 9, 10, 12, 13, 15, 16]
+idx: 3, delta: 2, matching: false, a (5): [0, 1, 4, 5, 8, 9, 11, 13, 15, 16], b (2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 14, 16]
+idx: 3, delta: 3, matching: false, a (6): [0, 4, 5, 9, 12, 13, 14, 15], b (1): [0, 2, 3, 6, 7, 9, 12, 15, 16]
+idx: 3, delta: 4, matching: false, a (7): [4, 5, 12, 13, 15], b (0): [2, 6, 7, 11, 12, 15]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [0, 4, 5, 9, 10, 12, 13, 15, 16], b (5): [0, 1, 4, 5, 8, 9, 11, 13, 15, 16]
+idx: 4, delta: 2, matching: false, a (6): [0, 4, 5, 9, 12, 13, 14, 15], b (3): [1, 2, 7, 8, 10, 11, 13, 14, 15]
+idx: 4, delta: 3, matching: false, a (7): [4, 5, 12, 13, 15], b (2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 14, 16]
+idx: 4, delta: 4, matching: false, a (8): [1, 8, 10, 14, 15], b (1): [0, 2, 3, 6, 7, 9, 12, 15, 16]
+idx: 4, delta: 5, matching: false, a (9): [0, 3, 6, 9, 11, 14, 16], b (0): [2, 6, 7, 11, 12, 15]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [0, 1, 4, 5, 8, 9, 11, 13, 15, 16], b (6): [0, 4, 5, 9, 12, 13, 14, 15]
+idx: 5, delta: 2, matching: false, a (7): [4, 5, 12, 13, 15], b (4): [0, 4, 5, 9, 10, 12, 13, 15, 16]
+idx: 5, delta: 3, matching: false, a (8): [1, 8, 10, 14, 15], b (3): [1, 2, 7, 8, 10, 11, 13, 14, 15]
+idx: 5, delta: 4, matching: false, a (9): [0, 3, 6, 9, 11, 14, 16], b (2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 14, 16]
+idx: 5, delta: 5, matching: false, a (10): [11, 12, 13, 16], b (1): [0, 2, 3, 6, 7, 9, 12, 15, 16]
+idx: 5, delta: 6, matching: false, a (11): [2, 3, 6, 7, 11, 15], b (0): [2, 6, 7, 11, 12, 15]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [0, 4, 5, 9, 12, 13, 14, 15], b (7): [4, 5, 12, 13, 15]
+idx: 6, delta: 2, matching: false, a (8): [1, 8, 10, 14, 15], b (5): [0, 1, 4, 5, 8, 9, 11, 13, 15, 16]
+idx: 6, delta: 3, matching: false, a (9): [0, 3, 6, 9, 11, 14, 16], b (4): [0, 4, 5, 9, 10, 12, 13, 15, 16]
+idx: 6, delta: 4, matching: false, a (10): [11, 12, 13, 16], b (3): [1, 2, 7, 8, 10, 11, 13, 14, 15]
+idx: 6, delta: 5, matching: false, a (11): [2, 3, 6, 7, 11, 15], b (2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 14, 16]
+idx: 6, delta: 6, matching: false, a (12): [1, 2, 3, 6, 7, 8, 11, 12, 13], b (1): [0, 2, 3, 6, 7, 9, 12, 15, 16]
+idx: 6, delta: 7, matching: false, a (13): [10, 13, 15], b (0): [2, 6, 7, 11, 12, 15]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [4, 5, 12, 13, 15], b (8): [1, 8, 10, 14, 15]
+idx: 7, delta: 2, matching: false, a (9): [0, 3, 6, 9, 11, 14, 16], b (6): [0, 4, 5, 9, 12, 13, 14, 15]
+idx: 7, delta: 3, matching: false, a (10): [11, 12, 13, 16], b (5): [0, 1, 4, 5, 8, 9, 11, 13, 15, 16]
+idx: 7, delta: 4, matching: false, a (11): [2, 3, 6, 7, 11, 15], b (4): [0, 4, 5, 9, 10, 12, 13, 15, 16]
+idx: 7, delta: 5, matching: false, a (12): [1, 2, 3, 6, 7, 8, 11, 12, 13], b (3): [1, 2, 7, 8, 10, 11, 13, 14, 15]
+idx: 7, delta: 6, matching: false, a (13): [10, 13, 15], b (2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 14, 16]
+idx: 7, delta: 7, matching: false, a (14): [10, 13, 15], b (1): [0, 2, 3, 6, 7, 9, 12, 15, 16]
+idx: 7, delta: 8, matching: false, a (15): [1, 2, 3, 6, 7, 8, 11, 12, 13], b (0): [2, 6, 7, 11, 12, 15]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [1, 8, 10, 14, 15], b (9): [0, 3, 6, 9, 11, 14, 16]
+idx: 8, delta: 2, matching: false, a (10): [11, 12, 13, 16], b (7): [4, 5, 12, 13, 15]
+idx: 8, delta: 3, matching: false, a (11): [2, 3, 6, 7, 11, 15], b (6): [0, 4, 5, 9, 12, 13, 14, 15]
+idx: 8, delta: 4, matching: false, a (12): [1, 2, 3, 6, 7, 8, 11, 12, 13], b (5): [0, 1, 4, 5, 8, 9, 11, 13, 15, 16]
+idx: 8, delta: 5, matching: false, a (13): [10, 13, 15], b (4): [0, 4, 5, 9, 10, 12, 13, 15, 16]
+idx: 8, delta: 6, matching: false, a (14): [10, 13, 15], b (3): [1, 2, 7, 8, 10, 11, 13, 14, 15]
+idx: 8, delta: 7, matching: false, a (15): [1, 2, 3, 6, 7, 8, 11, 12, 13], b (2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 14, 16]
+idx: 8, delta: 8, matching: false, a (16): [2, 3, 6, 7, 11, 15], b (1): [0, 2, 3, 6, 7, 9, 12, 15, 16]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [0, 3, 6, 9, 11, 14, 16], b (10): [11, 12, 13, 16]
+idx: 9, delta: 2, matching: false, a (11): [2, 3, 6, 7, 11, 15], b (8): [1, 8, 10, 14, 15]
+idx: 9, delta: 3, matching: false, a (12): [1, 2, 3, 6, 7, 8, 11, 12, 13], b (7): [4, 5, 12, 13, 15]
+idx: 9, delta: 4, matching: false, a (13): [10, 13, 15], b (6): [0, 4, 5, 9, 12, 13, 14, 15]
+idx: 9, delta: 5, matching: false, a (14): [10, 13, 15], b (5): [0, 1, 4, 5, 8, 9, 11, 13, 15, 16]
+idx: 9, delta: 6, matching: false, a (15): [1, 2, 3, 6, 7, 8, 11, 12, 13], b (4): [0, 4, 5, 9, 10, 12, 13, 15, 16]
+idx: 9, delta: 7, matching: false, a (16): [2, 3, 6, 7, 11, 15], b (3): [1, 2, 7, 8, 10, 11, 13, 14, 15]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [11, 12, 13, 16], b (11): [2, 3, 6, 7, 11, 15]
+idx: 10, delta: 2, matching: false, a (12): [1, 2, 3, 6, 7, 8, 11, 12, 13], b (9): [0, 3, 6, 9, 11, 14, 16]
+idx: 10, delta: 3, matching: false, a (13): [10, 13, 15], b (8): [1, 8, 10, 14, 15]
+idx: 10, delta: 4, matching: false, a (14): [10, 13, 15], b (7): [4, 5, 12, 13, 15]
+idx: 10, delta: 5, matching: false, a (15): [1, 2, 3, 6, 7, 8, 11, 12, 13], b (6): [0, 4, 5, 9, 12, 13, 14, 15]
+idx: 10, delta: 6, matching: false, a (16): [2, 3, 6, 7, 11, 15], b (5): [0, 1, 4, 5, 8, 9, 11, 13, 15, 16]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [2, 3, 6, 7, 11, 15], b (12): [1, 2, 3, 6, 7, 8, 11, 12, 13]
+idx: 11, delta: 2, matching: false, a (13): [10, 13, 15], b (10): [11, 12, 13, 16]
+idx: 11, delta: 3, matching: false, a (14): [10, 13, 15], b (9): [0, 3, 6, 9, 11, 14, 16]
+idx: 11, delta: 4, matching: false, a (15): [1, 2, 3, 6, 7, 8, 11, 12, 13], b (8): [1, 8, 10, 14, 15]
+idx: 11, delta: 5, matching: false, a (16): [2, 3, 6, 7, 11, 15], b (7): [4, 5, 12, 13, 15]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [1, 2, 3, 6, 7, 8, 11, 12, 13], b (13): [10, 13, 15]
+idx: 12, delta: 2, matching: false, a (14): [10, 13, 15], b (11): [2, 3, 6, 7, 11, 15]
+idx: 12, delta: 3, matching: false, a (15): [1, 2, 3, 6, 7, 8, 11, 12, 13], b (10): [11, 12, 13, 16]
+idx: 12, delta: 4, matching: false, a (16): [2, 3, 6, 7, 11, 15], b (9): [0, 3, 6, 9, 11, 14, 16]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: true, a (13): [10, 13, 15], b (14): [10, 13, 15]
+idx: 13, delta: 2, matching: true, a (15): [1, 2, 3, 6, 7, 8, 11, 12, 13], b (12): [1, 2, 3, 6, 7, 8, 11, 12, 13]
+idx: 13, delta: 3, matching: true, a (16): [2, 3, 6, 7, 11, 15], b (11): [2, 3, 6, 7, 11, 15]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [10, 13, 15], b (15): [1, 2, 3, 6, 7, 8, 11, 12, 13]
+idx: 14, delta: 2, matching: false, a (16): [2, 3, 6, 7, 11, 15], b (13): [10, 13, 15]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: false, a (15): [1, 2, 3, 6, 7, 8, 11, 12, 13], b (16): [2, 3, 6, 7, 11, 15]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [1, 2, 4, 5, 6, 9], b (1): [2, 3, 5, 8, 12, 15]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [2, 3, 5, 8, 12, 15], b (2): [0, 1, 2, 3, 11, 12, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [1, 2, 9, 11, 12, 15, 16], b (0): [1, 2, 4, 5, 6, 9]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [0, 1, 2, 3, 11, 12, 15, 16], b (3): [1, 2, 9, 11, 12, 15, 16]
+idx: 2, delta: 2, matching: false, a (4): [2, 4, 5, 6, 7], b (1): [2, 3, 5, 8, 12, 15]
+idx: 2, delta: 3, matching: false, a (5): [2, 4, 5, 6, 7], b (0): [1, 2, 4, 5, 6, 9]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [1, 2, 9, 11, 12, 15, 16], b (4): [2, 4, 5, 6, 7]
+idx: 3, delta: 2, matching: false, a (5): [2, 4, 5, 6, 7], b (2): [0, 1, 2, 3, 11, 12, 15, 16]
+idx: 3, delta: 3, matching: false, a (6): [0, 1, 2, 9, 11, 12, 15, 16], b (1): [2, 3, 5, 8, 12, 15]
+idx: 3, delta: 4, matching: false, a (7): [0, 1, 2, 3, 11, 12, 15, 16], b (0): [1, 2, 4, 5, 6, 9]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: true, a (4): [2, 4, 5, 6, 7], b (5): [2, 4, 5, 6, 7]
+idx: 4, delta: 2, matching: false, a (6): [0, 1, 2, 9, 11, 12, 15, 16], b (3): [1, 2, 9, 11, 12, 15, 16]
+idx: 4, delta: 2 --- found smudge!
+idx: 4, delta: 3, matching: true, a (7): [0, 1, 2, 3, 11, 12, 15, 16], b (2): [0, 1, 2, 3, 11, 12, 15, 16]
+idx: 4, delta: 4, matching: true, a (8): [2, 3, 5, 8, 12, 15], b (1): [2, 3, 5, 8, 12, 15]
+idx: 4, delta: 5, matching: true, a (9): [1, 2, 4, 5, 6, 9], b (0): [1, 2, 4, 5, 6, 9]
+idx: 4 --- EXITING WITH true
+.##.###..#.......
+..##.#..#...#..#.
+####.......##..##
+.##......#.##..##
+..#.####.........
+..#.####.........
+###......#.##..##
+####.......##..##
+..##.#..#...#..#.
+.##.###..#.......
+...##...#....##..
+#.##.#...####..##
+##..#.##..#.#..#.
+...#####..#.####.
+..##..#.##.......
+##.######..#.##.#
+.##.##...##......
+500 (vert: 0, horiz: 5)
+
+idx: 0, delta: 0, matching: true, a (0): [0, 3, 4, 5, 6, 7, 8, 10, 11], b (1): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: false, a (1): [0, 3, 4, 5, 6, 7, 8, 10, 11], b (2): [3, 4, 5, 10, 12]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 4, 5, 6, 10, 11, 12], b (0): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 1 --- EXITING WITH false
+idx: 2, delta: 0, matching: false, a (2): [3, 4, 5, 10, 12], b (3): [0, 1, 2, 3, 4, 5, 6, 10, 11, 12]
+idx: 2, delta: 2, matching: false, a (4): [4, 5, 7, 8, 9, 11], b (1): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 2, delta: 3, matching: false, a (5): [8, 10, 11], b (0): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 2 --- EXITING WITH false
+idx: 3, delta: 0, matching: false, a (3): [0, 1, 2, 3, 4, 5, 6, 10, 11, 12], b (4): [4, 5, 7, 8, 9, 11]
+idx: 3, delta: 2, matching: false, a (5): [8, 10, 11], b (2): [3, 4, 5, 10, 12]
+idx: 3, delta: 3, matching: false, a (6): [4, 5, 6, 9, 10, 11, 12], b (1): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 3, delta: 4, matching: false, a (7): [1, 2, 5, 6, 10], b (0): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 3 --- EXITING WITH false
+idx: 4, delta: 0, matching: false, a (4): [4, 5, 7, 8, 9, 11], b (5): [8, 10, 11]
+idx: 4, delta: 2, matching: false, a (6): [4, 5, 6, 9, 10, 11, 12], b (3): [0, 1, 2, 3, 4, 5, 6, 10, 11, 12]
+idx: 4, delta: 3, matching: false, a (7): [1, 2, 5, 6, 10], b (2): [3, 4, 5, 10, 12]
+idx: 4, delta: 4, matching: false, a (8): [4, 5, 9, 12], b (1): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 4, delta: 5, matching: false, a (9): [4, 5, 6, 8], b (0): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 4 --- EXITING WITH false
+idx: 5, delta: 0, matching: false, a (5): [8, 10, 11], b (6): [4, 5, 6, 9, 10, 11, 12]
+idx: 5, delta: 2, matching: false, a (7): [1, 2, 5, 6, 10], b (4): [4, 5, 7, 8, 9, 11]
+idx: 5, delta: 3, matching: false, a (8): [4, 5, 9, 12], b (3): [0, 1, 2, 3, 4, 5, 6, 10, 11, 12]
+idx: 5, delta: 4, matching: false, a (9): [4, 5, 6, 8], b (2): [3, 4, 5, 10, 12]
+idx: 5, delta: 5, matching: false, a (10): [6, 7, 12], b (1): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 5, delta: 6, matching: false, a (11): [1, 2, 5, 7, 8, 10, 11], b (0): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 5 --- EXITING WITH false
+idx: 6, delta: 0, matching: false, a (6): [4, 5, 6, 9, 10, 11, 12], b (7): [1, 2, 5, 6, 10]
+idx: 6, delta: 2, matching: false, a (8): [4, 5, 9, 12], b (5): [8, 10, 11]
+idx: 6, delta: 3, matching: false, a (9): [4, 5, 6, 8], b (4): [4, 5, 7, 8, 9, 11]
+idx: 6, delta: 4, matching: false, a (10): [6, 7, 12], b (3): [0, 1, 2, 3, 4, 5, 6, 10, 11, 12]
+idx: 6, delta: 5, matching: false, a (11): [1, 2, 5, 7, 8, 10, 11], b (2): [3, 4, 5, 10, 12]
+idx: 6, delta: 6, matching: false, a (12): [0, 3, 7, 11], b (1): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 6, delta: 7, matching: false, a (13): [0, 3, 6, 7, 8, 9, 11], b (0): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 6 --- EXITING WITH false
+idx: 7, delta: 0, matching: false, a (7): [1, 2, 5, 6, 10], b (8): [4, 5, 9, 12]
+idx: 7, delta: 2, matching: false, a (9): [4, 5, 6, 8], b (6): [4, 5, 6, 9, 10, 11, 12]
+idx: 7, delta: 3, matching: false, a (10): [6, 7, 12], b (5): [8, 10, 11]
+idx: 7, delta: 4, matching: false, a (11): [1, 2, 5, 7, 8, 10, 11], b (4): [4, 5, 7, 8, 9, 11]
+idx: 7, delta: 5, matching: false, a (12): [0, 3, 7, 11], b (3): [0, 1, 2, 3, 4, 5, 6, 10, 11, 12]
+idx: 7, delta: 6, matching: false, a (13): [0, 3, 6, 7, 8, 9, 11], b (2): [3, 4, 5, 10, 12]
+idx: 7, delta: 7, matching: false, a (14): [5, 6, 7, 9], b (1): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 7, delta: 8, matching: false, a (15): [0, 1, 2, 3, 6, 11], b (0): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 7 --- EXITING WITH false
+idx: 8, delta: 0, matching: false, a (8): [4, 5, 9, 12], b (9): [4, 5, 6, 8]
+idx: 8, delta: 2, matching: false, a (10): [6, 7, 12], b (7): [1, 2, 5, 6, 10]
+idx: 8, delta: 3, matching: false, a (11): [1, 2, 5, 7, 8, 10, 11], b (6): [4, 5, 6, 9, 10, 11, 12]
+idx: 8, delta: 4, matching: false, a (12): [0, 3, 7, 11], b (5): [8, 10, 11]
+idx: 8, delta: 5, matching: false, a (13): [0, 3, 6, 7, 8, 9, 11], b (4): [4, 5, 7, 8, 9, 11]
+idx: 8, delta: 6, matching: false, a (14): [5, 6, 7, 9], b (3): [0, 1, 2, 3, 4, 5, 6, 10, 11, 12]
+idx: 8, delta: 7, matching: false, a (15): [0, 1, 2, 3, 6, 11], b (2): [3, 4, 5, 10, 12]
+idx: 8, delta: 8, matching: false, a (16): [0, 1, 2, 3, 4, 5, 9, 10, 11], b (1): [0, 3, 4, 5, 6, 7, 8, 10, 11]
+idx: 8 --- EXITING WITH false
+idx: 9, delta: 0, matching: false, a (9): [4, 5, 6, 8], b (10): [6, 7, 12]
+idx: 9, delta: 2, matching: false, a (11): [1, 2, 5, 7, 8, 10, 11], b (8): [4, 5, 9, 12]
+idx: 9, delta: 3, matching: false, a (12): [0, 3, 7, 11], b (7): [1, 2, 5, 6, 10]
+idx: 9, delta: 4, matching: false, a (13): [0, 3, 6, 7, 8, 9, 11], b (6): [4, 5, 6, 9, 10, 11, 12]
+idx: 9, delta: 5, matching: false, a (14): [5, 6, 7, 9], b (5): [8, 10, 11]
+idx: 9, delta: 6, matching: false, a (15): [0, 1, 2, 3, 6, 11], b (4): [4, 5, 7, 8, 9, 11]
+idx: 9, delta: 7, matching: false, a (16): [0, 1, 2, 3, 4, 5, 9, 10, 11], b (3): [0, 1, 2, 3, 4, 5, 6, 10, 11, 12]
+idx: 9 --- EXITING WITH false
+idx: 10, delta: 0, matching: false, a (10): [6, 7, 12], b (11): [1, 2, 5, 7, 8, 10, 11]
+idx: 10, delta: 2, matching: false, a (12): [0, 3, 7, 11], b (9): [4, 5, 6, 8]
+idx: 10, delta: 3, matching: false, a (13): [0, 3, 6, 7, 8, 9, 11], b (8): [4, 5, 9, 12]
+idx: 10, delta: 4, matching: false, a (14): [5, 6, 7, 9], b (7): [1, 2, 5, 6, 10]
+idx: 10, delta: 5, matching: false, a (15): [0, 1, 2, 3, 6, 11], b (6): [4, 5, 6, 9, 10, 11, 12]
+idx: 10, delta: 6, matching: false, a (16): [0, 1, 2, 3, 4, 5, 9, 10, 11], b (5): [8, 10, 11]
+idx: 10 --- EXITING WITH false
+idx: 11, delta: 0, matching: false, a (11): [1, 2, 5, 7, 8, 10, 11], b (12): [0, 3, 7, 11]
+idx: 11, delta: 2, matching: false, a (13): [0, 3, 6, 7, 8, 9, 11], b (10): [6, 7, 12]
+idx: 11, delta: 3, matching: false, a (14): [5, 6, 7, 9], b (9): [4, 5, 6, 8]
+idx: 11, delta: 4, matching: false, a (15): [0, 1, 2, 3, 6, 11], b (8): [4, 5, 9, 12]
+idx: 11, delta: 5, matching: false, a (16): [0, 1, 2, 3, 4, 5, 9, 10, 11], b (7): [1, 2, 5, 6, 10]
+idx: 11 --- EXITING WITH false
+idx: 12, delta: 0, matching: false, a (12): [0, 3, 7, 11], b (13): [0, 3, 6, 7, 8, 9, 11]
+idx: 12, delta: 2, matching: false, a (14): [5, 6, 7, 9], b (11): [1, 2, 5, 7, 8, 10, 11]
+idx: 12, delta: 3, matching: false, a (15): [0, 1, 2, 3, 6, 11], b (10): [6, 7, 12]
+idx: 12, delta: 4, matching: false, a (16): [0, 1, 2, 3, 4, 5, 9, 10, 11], b (9): [4, 5, 6, 8]
+idx: 12 --- EXITING WITH false
+idx: 13, delta: 0, matching: false, a (13): [0, 3, 6, 7, 8, 9, 11], b (14): [5, 6, 7, 9]
+idx: 13, delta: 2, matching: false, a (15): [0, 1, 2, 3, 6, 11], b (12): [0, 3, 7, 11]
+idx: 13, delta: 3, matching: false, a (16): [0, 1, 2, 3, 4, 5, 9, 10, 11], b (11): [1, 2, 5, 7, 8, 10, 11]
+idx: 13 --- EXITING WITH false
+idx: 14, delta: 0, matching: false, a (14): [5, 6, 7, 9], b (15): [0, 1, 2, 3, 6, 11]
+idx: 14, delta: 2, matching: false, a (16): [0, 1, 2, 3, 4, 5, 9, 10, 11], b (13): [0, 3, 6, 7, 8, 9, 11]
+idx: 14 --- EXITING WITH false
+idx: 15, delta: 0, matching: false, a (15): [0, 1, 2, 3, 6, 11], b (16): [0, 1, 2, 3, 4, 5, 9, 10, 11]
+idx: 15 --- EXITING WITH false
+idx: 16 --- EXITING WITH false
+idx: 0, delta: 0, matching: false, a (0): [0, 1, 3, 12, 13, 15, 16], b (1): [3, 7, 11, 15, 16]
+idx: 0 --- EXITING WITH false
+idx: 1, delta: 0, matching: true, a (1): [3, 7, 11, 15, 16], b (2): [3, 7, 11, 15, 16]
+idx: 1, delta: 2, matching: false, a (3): [0, 1, 2, 3, 12, 13, 15, 16], b (0): [0, 1, 3, 12, 13, 15, 16]
+idx: 1, delta: 2 --- found smudge!
+idx: 1 --- EXITING WITH true
+##.#........##.##
+...#...#...#...##
+...#...#...#...##
+####........##.##
+#####.#.##......#
+#####.####.#..#.#
+##.#..##.##..###.
+##..#.....#####..
+##..##...#.#.#...
+....#.#.#....##.#
+####.###...#....#
+##.####....###.##
+..##..#.#.#......
+200 (vert: 0, horiz: 2)
+
+test tests::test_part2 ... FAILED
+
+failures:
+
+failures:
+    tests::test_part2
+
+test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 9 filtered out; finished in 0.02s
+
diff --git a/y2023/ex13/input.txt b/y2023/ex13/input.txt
new file mode 100644
index 0000000..096b141
--- /dev/null
+++ b/y2023/ex13/input.txt
@@ -0,0 +1,1343 @@
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+..#..##
+...##..
+
+.######
+.######
+.....##
+###.#.#
+#.####.
+#...#..
+#.##...
+#.##..#
+..##.##
+...#.#.
+...#.#.
+..##.##
+####..#
+
+......#
+......#
+####.#.
+.#.##.#
+..##...
+#.##..#
+.##.###
+.##..##
+#.##..#
+
+..##.##..##..
+###..########
+#.#####..##..
+#.#####..##..
+###..########
+..##.##..##..
+#..###.......
+...#..#.#####
+###........##
+.#.#.#.#....#
+......#..#.##
+
+..##....#......##
+..##....#......##
+###.####..###.###
+#.##.##.###.#.##.
+......##.####...#
+#.##.###...######
+.####.###.#...###
+
+###...##...####
+.##...##...##.#
+.#....##....#..
+....######.....
+.####.##.####.#
+..####..####..#
+..####..####...
+
+######..#####
+#...######...
+#..#.####.#..
+.###......###
+.##.#.##.#.##
+...#.####.#..
+#.#.##..##.#.
+#.#.##..##.#.
+...#.####.#..
+.##.#.##.#.##
+.###......###
+#..#.####.#..
+#...######...
+######..#####
+#..####.###..
+...##.##.##..
+##...####...#
+
+.##.###..#.......
+..##.#..#...#..#.
+####.......##..##
+.##......#.##..##
+..#.####.........
+..#.####.........
+###......#.##..##
+####.......##..##
+..##.#..#...#..#.
+.##.###..#.......
+...##...#....##..
+#.##.#...####..##
+##..#.##..#.#..#.
+...#####..#.####.
+..##..#.##.......
+##.######..#.##.#
+.##.##...##......
+
+##.#........##.##
+...#...#...#...##
+...#...#...#...##
+####........##.##
+#####.#.##......#
+#####.####.#..#.#
+##.#..##.##..###.
+##..#.....#####..
+##..##...#.#.#...
+....#.#.#....##.#
+####.###...#....#
+##.####....###.##
+..##..#.#.#......
\ No newline at end of file
diff --git a/y2023/ex13/src/lib.rs b/y2023/ex13/src/lib.rs
new file mode 100644
index 0000000..78d4bca
--- /dev/null
+++ b/y2023/ex13/src/lib.rs
@@ -0,0 +1,89 @@
+use models::Map;
+
+mod models;
+
+pub fn part1(input: &str) -> usize {
+    input
+        .split("\n\n")
+        .map(|raw_map| {
+            let map: Map = raw_map.parse().unwrap();
+            let vertical_reflection = match map.find_vertical_reflection() {
+                Some(col) => col + 1,
+                None => 0,
+            };
+            let horizontal_reflection = match map.find_horizontal_reflection() {
+                Some(row) => row + 1,
+                None => 0,
+            };
+
+            vertical_reflection + horizontal_reflection * 100
+        })
+        .sum()
+}
+
+pub fn part2(input: &str) -> usize {
+    input
+        .split("\n\n")
+        .map(|raw_map| {
+            let map: Map = raw_map.parse().unwrap();
+            let vertical_reflection = match map.find_vertical_reflection_with_smudge() {
+                Some(col) => col + 1,
+                None => 0,
+            };
+            let horizontal_reflection = match map.find_horizontal_reflection_with_smudge() {
+                Some(row) => row + 1,
+                None => 0,
+            };
+
+            let result = vertical_reflection + horizontal_reflection * 100;
+
+            println!(
+                "{}\n{} (vert: {}, horiz: {})\n",
+                raw_map, result, vertical_reflection, horizontal_reflection
+            );
+
+            result
+        })
+        .sum()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    const INPUT: &str = include_str!("../input.txt");
+    const EXAMPLE_INPUT: &str = "#.##..##.
+..#.##.#.
+##......#
+##......#
+..#.##.#.
+..##..##.
+#.#.##.#.
+
+#...##..#
+#....#..#
+..##..###
+#####.##.
+#####.##.
+..##..###
+#....#..#";
+
+    #[test]
+    fn test_part1_example() {
+        assert_eq!(part1(EXAMPLE_INPUT), 405);
+    }
+
+    #[test]
+    fn test_part1() {
+        assert_eq!(part1(INPUT), 30575);
+    }
+
+    #[test]
+    fn test_part2_example() {
+        assert_eq!(part2(EXAMPLE_INPUT), 400);
+    }
+
+    #[test]
+    fn test_part2() {
+        assert_eq!(part2(INPUT), 0);
+    }
+}
diff --git a/y2023/ex13/src/models.rs b/y2023/ex13/src/models.rs
new file mode 100644
index 0000000..75a9b0f
--- /dev/null
+++ b/y2023/ex13/src/models.rs
@@ -0,0 +1,251 @@
+use std::{
+    cmp::min,
+    collections::{HashMap, HashSet},
+    str::FromStr,
+};
+
+#[derive(Debug, Clone)]
+pub struct Map {
+    width: usize,
+    height: usize,
+    rows: HashMap<usize, HashSet<usize>>,
+    cols: HashMap<usize, HashSet<usize>>,
+}
+
+impl FromStr for Map {
+    type Err = ();
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let width = s.lines().next().unwrap().len();
+        let height = s.lines().count();
+        let mut rows: HashMap<usize, HashSet<usize>> = HashMap::new();
+        let mut cols: HashMap<usize, HashSet<usize>> = HashMap::new();
+
+        for (row, line) in s.lines().enumerate() {
+            for (col, tile) in line.chars().enumerate() {
+                if tile == '#' {
+                    rows.entry(row).or_default().insert(col);
+                    cols.entry(col).or_default().insert(row);
+                }
+            }
+        }
+
+        Ok(Map {
+            width,
+            height,
+            rows,
+            cols,
+        })
+    }
+}
+
+impl Map {
+    fn has_reflection_at(
+        &self,
+        idx: usize,
+        len: usize,
+        ref_index: &HashMap<usize, HashSet<usize>>,
+    ) -> bool {
+        let min_distance_to_edge = min(idx, len - idx);
+        for delta in 0..=(min_distance_to_edge + 1) {
+            if idx + delta >= len {
+                continue;
+            }
+            let points_a = ref_index.get(&(idx + delta));
+            let points_b = ref_index.get(&(idx + 1 - delta));
+            let matching = points_a == points_b;
+            if !matching {
+                return false;
+            }
+        }
+
+        true
+    }
+
+    fn has_reflection_with_smudge_at(
+        &self,
+        idx: usize,
+        len: usize,
+        ref_index: &HashMap<usize, HashSet<usize>>,
+    ) -> bool {
+        let min_distance_to_edge = min(idx, len - idx);
+        let mut found_smudge = false;
+
+        let mut compared = HashSet::new();
+
+        for delta in 0..=(min_distance_to_edge + 1) {
+            if idx + delta >= len || idx + 1 - delta >= len {
+                continue;
+            }
+
+            let points_a_idx = idx + delta;
+            let points_b_idx = idx + 1 - delta;
+            if compared.contains(&(points_a_idx, points_b_idx)) {
+                continue;
+            }
+
+            let points_a = ref_index.get(&points_a_idx).unwrap();
+            let points_b = ref_index.get(&points_b_idx).unwrap();
+            compared.insert((points_a_idx, points_b_idx));
+            compared.insert((points_b_idx, points_a_idx));
+            let matching = points_a == points_b;
+
+            let mut a = points_a.iter().collect::<Vec<_>>();
+            a.sort();
+            let mut b = points_b.iter().collect::<Vec<_>>();
+            b.sort();
+            println!(
+                "idx: {}, delta: {}, matching: {}, a ({}): {:?}, b ({}): {:?}",
+                idx,
+                delta,
+                matching,
+                idx + delta,
+                a,
+                idx + 1 - delta,
+                b
+            );
+
+            if !matching && found_smudge {
+                println!("idx: {}, delta: {} --- found smudge twice!", idx, delta);
+                // cannot have more than 1 smudge
+                return false;
+            }
+            // Check if there's a smudge.
+            // There must be only 1 difference between the sets, which means that the instersection
+            // should contain the same number of elements of the set with the least amount of elements.
+            let len_diff = (points_a.len() as isize - points_b.len() as isize).abs();
+            if points_a.intersection(points_b).count() == min(points_a.len(), points_b.len())
+                && len_diff == 1
+            {
+                println!("idx: {}, delta: {} --- found smudge!", idx, delta);
+                found_smudge = true;
+            }
+        }
+
+        println!("idx: {} --- EXITING WITH {}", idx, found_smudge);
+
+        found_smudge
+    }
+
+    pub fn find_vertical_reflection(&self) -> Option<usize> {
+        (0..self.width).find(|&col| self.has_reflection_at(col, self.width, &self.cols))
+    }
+
+    pub fn find_horizontal_reflection(&self) -> Option<usize> {
+        (0..self.height).find(|&row| self.has_reflection_at(row, self.height, &self.rows))
+    }
+
+    pub fn find_vertical_reflection_with_smudge(&self) -> Option<usize> {
+        (0..self.width).find(|&col| self.has_reflection_with_smudge_at(col, self.width, &self.cols))
+    }
+
+    pub fn find_horizontal_reflection_with_smudge(&self) -> Option<usize> {
+        (0..self.height)
+            .find(|&row| self.has_reflection_with_smudge_at(row, self.height, &self.rows))
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_find_vertical_reflection() {
+        let raw_map = "#.##..##.
+..#.##.#.
+##......#
+##......#
+..#.##.#.
+..##..##.
+#.#.##.#.";
+        let map: Map = raw_map.parse().unwrap();
+        let vertical_reflection = map.find_vertical_reflection().unwrap();
+        assert_eq!(vertical_reflection, 4);
+        let horizontal_reflection = map.find_horizontal_reflection();
+        assert!(horizontal_reflection.is_none());
+    }
+
+    #[test]
+    fn test_find_vertical_reflection2() {
+        let raw_map = "####.##.#######
+.####..####....
+####.##.#######
+.###.##.###.##.
+.##..##..##....
+.#...##...#.##.
+#..######..####
+#..#....#..####
+.###.##.###.##.
+#.#..##.##.####
+#.#.#..#.#.#..#
+####....#######
+.##......##.##.";
+        let map: Map = raw_map.parse().unwrap();
+        let vertical_reflection = map.find_vertical_reflection().unwrap();
+        assert_eq!(vertical_reflection, 12);
+        let horizontal_reflection = map.find_horizontal_reflection();
+        assert!(horizontal_reflection.is_none());
+    }
+
+    #[test]
+    fn test_find_horizontal_reflection() {
+        let raw_map = "#...##..#
+#....#..#
+..##..###
+#####.##.
+#####.##.
+..##..###
+#....#..#";
+        let map: Map = raw_map.parse().unwrap();
+        let horizontal_reflection = map.find_horizontal_reflection().unwrap();
+        assert_eq!(horizontal_reflection, 3);
+        let vertical_reflection = map.find_vertical_reflection();
+        assert!(vertical_reflection.is_none());
+    }
+
+    #[test]
+    fn test_find_horizontal_reflection2() {
+        let raw_map = "#.###.#..
+#.###.#..
+..##.#.##
+#.####.#.
+#####...#
+#.##.##..
+..##.#...
+##...###.
+.#....#.#
+#..#...##
+#..#.#.##";
+        let map: Map = raw_map.parse().unwrap();
+        let horizontal_reflection = map.find_horizontal_reflection().unwrap();
+        assert_eq!(horizontal_reflection, 0);
+    }
+
+    #[test]
+    fn test_find_horizontal_reflection_with_smudge() {
+        let raw_map = "#.##..##.
+..#.##.#.
+##......#
+##......#
+..#.##.#.
+..##..##.
+#.#.##.#.";
+        let map: Map = raw_map.parse().unwrap();
+        let horizontal_reflection = map.find_horizontal_reflection_with_smudge().unwrap();
+        assert_eq!(horizontal_reflection, 2);
+    }
+
+    #[test]
+    fn test_find_horizontal_reflection_with_smudge2() {
+        let raw_map = "#...##..#
+#....#..#
+..##..###
+#####.##.
+#####.##.
+..##..###
+#....#..#";
+        let map: Map = raw_map.parse().unwrap();
+        let horizontal_reflection = map.find_horizontal_reflection_with_smudge().unwrap();
+        assert_eq!(horizontal_reflection, 0);
+    }
+}