Task: Program Execution
Input (English): 321 9421 f I 6627 8657 2657 1435 n w 3067 e 2397 5567 l q 4793 c 3547 p 8855 7797 E 6203 L 8567 2001 9083 5181 1733 7019
Output (English): 3, 4, 9, 10, 12, 15, 16, 18, 20, 23, 25