Task: Program Execution
Input (English): i 1527 9723 N 9777 2689 f 2697 3589 3677 b K 1889 8295 i 5203 1325 1853 x m o 4467 7489 6627 i 9269 s u L Y f 1445 u
Output (English): 1, 4, 7, 11, 12, 15, 19, 20, 21, 25, 27, 28, 29, 30, 31, 33