Task: Program Execution
Input (English): 2721 8197 3247 825 3637 4839 E 6399 3007 6597 q C O 1529 f 1647 z 3355 9481 P i 4365 9737 8861 4607 p
Output (English): 1, 2, 3, 4, 5, 6, 8, 9, 10, 14, 16, 18, 19, 22, 23, 24, 25