Task: Program Execution
Input (English): 597 G 6921 7459 1613 k I E 8741 Z 455 P c R 6721 d a K 4483 u 153 B R 63 2133 a 541 t
Output (English): 2, 6, 7, 8, 10, 12, 13, 14, 16, 17, 18, 20, 22, 23, 26, 28