Task: Program Execution
Input (English): 0, M, 6, 8, 4, M
Output (English): [['0', 'M', '6', '8', '4'], ['0', 'M', '6', '8', 'M'], ['0', 'M', '6', '4', 'M'], ['0', 'M', '8', '4', 'M'], ['0', '6', '8', '4', 'M'], ['M', '6', '8', '4', 'M']]