Task: Program Execution
Input (English): u R 4671 8405 y b 4569 u 2265 J 9579 9897 2615 5175 2071 b 5443 k 2747 8059 P 8399 g 2871 6731 8549 5331
Output (English): 1, 2, 5, 6, 8, 10, 16, 18, 21, 23