Task: Program Execution
Input (English): 4, 7, m, 9, L, 5, D
Output (English): [['4', '7', 'm', '9', 'L', '5'], ['4', '7', 'm', '9', 'L', 'D'], ['4', '7', 'm', '9', '5', 'D'], ['4', '7', 'm', 'L', '5', 'D'], ['4', '7', '9', 'L', '5', 'D'], ['4', 'm', '9', 'L', '5', 'D'], ['7', 'm', '9', 'L', '5', 'D']]