Task: Program Execution
Input (English): f 4049 5717 6335 5907 4707 8275 4831 l Z 2615 2473 S 4761 6555 t O 1283 2151 n s 3253 5361 s a 8777 8375 5647 2753 b b N u
Output (English): 2, 3, 4, 5, 6, 7, 8, 11, 12, 14, 15, 18, 19, 22, 23, 26, 27, 28, 29