Task: Program Execution
Input (English): x, 2, Q, 2, 4, F, 8
Output (English): [['x', '2', 'Q', '2', '4', 'F'], ['x', '2', 'Q', '2', '4', '8'], ['x', '2', 'Q', '2', 'F', '8'], ['x', '2', 'Q', '4', 'F', '8'], ['x', '2', '2', '4', 'F', '8'], ['x', 'Q', '2', '4', 'F', '8'], ['2', 'Q', '2', '4', 'F', '8']]