Task: Program Execution
Input (English): 12, 17, ['2907', '7521', '3341', '5047', '8207', 'B', 'O', 'n', '8341', '8137', '2305', 'z', '9691', 'H', '8331', 'D', 'M', 'B', '2255', 'C', '1217', 'Z', 'H']
Output (English): M, D, 8331, H, 9691, z