Task: Program Execution
Input (English): 1899 W B A 3975 W 2073 2457 8609 2965 5807 1751 E 903 w 1327 t 3877 f 3419 321 F a 4115 j 7049 4747 e k e 3055 6123 C b 3141 G Q
Output (English): 2, 3, 4, 6, 13, 15, 17, 19, 22, 23, 25, 28, 29, 30, 33, 34, 36, 37