Task: Program Execution
Input (English): c, U, 8, 1, 2, W, 8
Output (English): [['c', 'U', '8', '1', '2', 'W'], ['c', 'U', '8', '1', '2', '8'], ['c', 'U', '8', '1', 'W', '8'], ['c', 'U', '8', '2', 'W', '8'], ['c', 'U', '1', '2', 'W', '8'], ['c', '8', '1', '2', 'W', '8'], ['U', '8', '1', '2', 'W', '8']]