Task: Program Execution
Input (English): 7575 O 8465 k 6373 O 8565 a 9781 r k H 8547 c U f f o 3643 3721 s t 6079 7855 8071 y 4499 l s 5263 a
Output (English): 2, 4, 6, 8, 10, 11, 12, 14, 15, 16, 17, 18, 21, 22, 26, 28, 29, 31