Task: Program Execution
Input (English): m, 4, e, x, Q, 4, s
Output (English): [['m', '4', 'e', 'x', 'Q', '4'], ['m', '4', 'e', 'x', 'Q', 's'], ['m', '4', 'e', 'x', '4', 's'], ['m', '4', 'e', 'Q', '4', 's'], ['m', '4', 'x', 'Q', '4', 's'], ['m', 'e', 'x', 'Q', '4', 's'], ['4', 'e', 'x', 'Q', '4', 's']]