Task: Program Execution
Input (English): 553 4199 r 7255 1201 113 c f s X p 3539 7715 i M 6265 6895 8567 5085 2661 k 6499 2699 w 7135 R R 3219 t 9203 Y p 6719 9435 Y b l
Output (English): 3, 7, 8, 9, 10, 11, 14, 15, 21, 24, 26, 27, 29, 31, 32, 35, 36, 37