Task: Program Execution
Input (English): W f 543 P Y E 1231 2647 3103 C 6267 8983 2793 8187 3787 2991 k 367 4731 391 6149 9707 2905 4263 t
Output (English): 3, 7, 8, 9, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24