Task: Program Execution
Input (English): 6649 L 7611 B 7459 2901 d e s x C i 8443 1333 8117 m 9345 8181 1233 149 y 6263 u c 4693
Output (English): 2, 4, 7, 8, 9, 10, 11, 12, 16, 21, 23, 24