Task: Program Execution
Input (English): 7, 5, l, 6, M, D
Output (English): [['7', '5', 'l', '6', 'M'], ['7', '5', 'l', '6', 'D'], ['7', '5', 'l', 'M', 'D'], ['7', '5', '6', 'M', 'D'], ['7', 'l', '6', 'M', 'D'], ['5', 'l', '6', 'M', 'D']]