Task: Program Execution
Input (English): 6, ['M', '2465', '2081', '481', '7817', '1543', '7521', '3043', 'W', '4653', '4455', '9989', 'M', 'n', '4295', '8945', '8849', 'B', 'm', '7801', '1987', '8793', '6053', 'r', 'X', '8315']
Output (English): M, 7521, M, m, X