Task: Program Execution
Input (English): o, 4, e, 8, O, P
Output (English): [['o', '4', 'e', '8', 'O'], ['o', '4', 'e', '8', 'P'], ['o', '4', 'e', 'O', 'P'], ['o', '4', '8', 'O', 'P'], ['o', 'e', '8', 'O', 'P'], ['4', 'e', '8', 'O', 'P']]