Task: Program Execution
Input (English): 3115 n C d a i I 6473 E 3957 c i 5483 1715 r E 7537 u S V 5809 2945 3263 9669 6245 X t 4329 Z r k 5621
Output (English): 2, 3, 4, 5, 6, 7, 9, 11, 12, 15, 16, 18, 19, 20, 26, 27, 29, 30, 31