Task: Program Execution
Input (English): 2977 X 2937 7875 y V 3543 3881 4655 9629 8541 4265 7753 t J D 9819 l Y D 9331 t E R 4307 t
Output (English): 1, 3, 4, 7, 8, 9, 10, 11, 12, 13, 17, 21, 25