Task: Program Execution
Input (English): M k 2057 4447 D q m 4107 a 7927 U L 7601 i B O r 3139 e y 1569 9325 C N M 323 r F 2901 4203
Output (English): 1, 2, 5, 6, 7, 9, 11, 12, 14, 15, 16, 17, 19, 20, 23, 24, 25, 27, 28