Task: Program Execution
Input (English): 1, 6, m, 1, 2, 9, 2
Output (English): [['1', '6', 'm', '1', '2', '9'], ['1', '6', 'm', '1', '2', '2'], ['1', '6', 'm', '1', '9', '2'], ['1', '6', 'm', '2', '9', '2'], ['1', '6', '1', '2', '9', '2'], ['1', 'm', '1', '2', '9', '2'], ['6', 'm', '1', '2', '9', '2']]