Task: Program Execution
Input (English): x, C, I, 7, G, a, P
Output (English): [['x', 'C', 'I', '7', 'G', 'a'], ['x', 'C', 'I', '7', 'G', 'P'], ['x', 'C', 'I', '7', 'a', 'P'], ['x', 'C', 'I', 'G', 'a', 'P'], ['x', 'C', '7', 'G', 'a', 'P'], ['x', 'I', '7', 'G', 'a', 'P'], ['C', 'I', '7', 'G', 'a', 'P']]