Task: Program Execution
Input (English): D, a, 8, 0, a, 8
Output (English): [['D', 'a', '8', '0', 'a'], ['D', 'a', '8', '0', '8'], ['D', 'a', '8', 'a', '8'], ['D', 'a', '0', 'a', '8'], ['D', '8', '0', 'a', '8'], ['a', '8', '0', 'a', '8']]