Task: Program Execution
Input (English): 6897 K 3609 I A k F 3705 2667 F N 7581 1767 s 8197 2541 861 7815 f 4477 H 7711 d 6453 211 u Q
Output (English): 1, 3, 8, 9, 12, 13, 15, 16, 17, 18, 20, 22, 24, 25