Task: Program Execution
Input (English): d t F 7867 R f o 629 X 2829 6001 2183 3465 f 2883 941 m 8415 6581 4849 1303 d 4429 p n r 1497 4537 Y O 6793
Output (English): 4, 8, 10, 11, 12, 13, 15, 16, 18, 19, 20, 21, 23, 27, 28, 31