Task: Program Execution
Input (English): 2407 B 6345 4141 3959 6237 I x 327 8485 N 4613 8307 l r o Y c 9951 4985 6659 6063 r 2479 o O 5349 4031 r 4733 t 4841 6555
Output (English): 2, 7, 8, 11, 14, 15, 16, 17, 18, 23, 25, 26, 29, 31