Task: Program Execution
Input (English): z 5777 9979 z f R 9441 W 6259 5665 287 9025 7971 237 T c 9335 7775 2171 8789 8489 Z 7065 l r M b I I
Output (English): 2, 3, 7, 9, 10, 11, 12, 13, 14, 17, 18, 19, 20, 21, 23