Task: Program Execution
Input (English): 8461 6505 7931 z t f Q d M s 7641 8669 F a 8599 2571 J Z P l 8693 221 3213 661 9165 6143
Output (English): 4, 5, 6, 7, 8, 9, 10, 13, 14, 17, 18, 19, 20