update increment function

index.js

@@ -29,25 +29,26 @@ function input(name, def) {
 }
 
 function increment(string, amount) {
-
-  // Extract string's number
-  var number = string.match(/\d+/) === null ? 0 : string.match(/\d+/)[0];
-
-  // Store number's length
-  var numberLength = number.length;
-  var leadingZeroes = number.startsWith("0");
-
-  // Increment number by the amount
-  number = (parseInt(number, 10) + parseInt(amount, 10)).toString();
-
-  // If there were leading 0s, add them again
-  if (leadingZeroes) {
-    while (number.length < numberLength) {
-      number = "0" + number;
+  // Extract string's numbers
+  var numbers = string.match(/\d+/g) || [];
+
+  // Increment the last number by the amount
+  var lastNumberIndex = numbers.length - 1;
+  var lastNumber = parseInt(numbers[lastNumberIndex], 10) || 0;
+  numbers[lastNumberIndex] = (lastNumber + parseInt(amount, 10)).toString();
+
+  // Reconstruct the string with incremented numbers and leading zeroes
+  var result = string.replace(/\d+/g, function (match) {
+    var currentNumber = numbers.shift();
+    if (match.startsWith("0")) {
+      while (currentNumber.length < match.length) {
+        currentNumber = "0" + currentNumber;
+      }
     }
-  }
+    return currentNumber;
+  });
 
-  return string.replace(/[0-9]/g, "").concat(number);
+  return result;
 }
 
 const createVariable = (data) => {