Task: Program Execution
Input (English): y, 4, a, 6, O, 2
Output (English): [['y', '4', 'a', '6', 'O'], ['y', '4', 'a', '6', '2'], ['y', '4', 'a', 'O', '2'], ['y', '4', '6', 'O', '2'], ['y', 'a', '6', 'O', '2'], ['4', 'a', '6', 'O', '2']]