Task: Program Execution
Input (English): 8669 8971 s L 3949 2169 U 8667 5771 3823 2077 j 6703 7499 s H B D 5109 4917 t M b Y 7821 2777 307 5069 G Z z 3905 2081 555 2047 145 v 2461 6713
Output (English): 3, 4, 7, 12, 15, 16, 17, 18, 21, 22, 23, 24, 29, 30, 31, 37