Task: Program Execution
Input (English): B 9991 2019 1917 R S 6163 5401 a i 1835 2649 Q H U 2239 9303 2603 2231 m n 6967 7683 3873 A W r a 2939 k M t G P
Output (English): 1, 5, 6, 9, 10, 13, 14, 15, 20, 21, 25, 26, 27, 28, 30, 31, 32, 33, 34