Task: Program Execution
Input (English): z, 7, 1, 2, 6, W
Output (English): [['z', '7', '1', '2', '6'], ['z', '7', '1', '2', 'W'], ['z', '7', '1', '6', 'W'], ['z', '7', '2', '6', 'W'], ['z', '1', '2', '6', 'W'], ['7', '1', '2', '6', 'W']]