Task: Program Execution
Input (English): P, 7, Z, 5, O, 5
Output (English): [['P', '7', 'Z', '5', 'O'], ['P', '7', 'Z', '5', '5'], ['P', '7', 'Z', 'O', '5'], ['P', '7', '5', 'O', '5'], ['P', 'Z', '5', 'O', '5'], ['7', 'Z', '5', 'O', '5']]