Task: Program Execution
Input (English): g 447 3415 B H 1967 J 9843 915 2111 9879 g N 2421 A I 9857 7749 8493 L l 3235 7863 4239 a 2785 j A 9679
Output (English): 1, 4, 5, 7, 12, 13, 15, 16, 20, 21, 25, 27, 28