diff --git a/Task1.py b/Lesson1/Task1.py
similarity index 100%
rename from Task1.py
rename to Lesson1/Task1.py
diff --git a/Task4.py b/Lesson1/Task4.py
similarity index 100%
rename from Task4.py
rename to Lesson1/Task4.py
diff --git a/Task5.py b/Lesson1/Task5.py
similarity index 100%
rename from Task5.py
rename to Lesson1/Task5.py
diff --git a/Task6.py b/Lesson1/Task6.py
similarity index 100%
rename from Task6.py
rename to Lesson1/Task6.py
diff --git a/Task7.py b/Lesson1/Task7.py
similarity index 100%
rename from Task7.py
rename to Lesson1/Task7.py
diff --git a/Task8.py b/Lesson1/Task8.py
similarity index 100%
rename from Task8.py
rename to Lesson1/Task8.py
diff --git a/Lesson2/task2.py b/Lesson2/task2.py
new file mode 100644
index 0000000..e69de29
diff --git a/Lesson2/task4.py b/Lesson2/task4.py
new file mode 100644
index 0000000..86b8319
--- /dev/null
+++ b/Lesson2/task4.py
@@ -0,0 +1,17 @@
+n = int(input('До какого числа считать простые числа: '))
+
+sieve = [i for i in range(n)]
+sieve[1] = 0
+
+for i in range(2, n):
+    if sieve[i] != 0:
+        j = i + i
+        while j < n:
+            sieve[j] = 0
+            j += i
+
+res = [i for i in sieve if i != 0]
+
+print(sieve)
+print(res)
+print(len(res))
diff --git a/Lesson2/task5.py b/Lesson2/task5.py
new file mode 100644
index 0000000..e69de29