Task: Program Execution
Input (English): U, m, 1, V, W, w
Output (English): [['U', 'm', '1', 'V', 'W'], ['U', 'm', '1', 'V', 'w'], ['U', 'm', '1', 'W', 'w'], ['U', 'm', 'V', 'W', 'w'], ['U', '1', 'V', 'W', 'w'], ['m', '1', 'V', 'W', 'w']]