Task: Program Execution
Input (English): 2993 D L 6479 7953 81 9747 2963 i 307 8789 4759 O G X 313 3357 5309 b 2713 6119 123 o 1303 c 4865 i 211 k P D o c d
Output (English): 2, 3, 9, 13, 14, 15, 19, 23, 25, 27, 29, 30, 31, 32, 33, 34