Task: Program Execution
Input (English): i, x, J, y, 6, b
Output (English): [['i', 'x', 'J', 'y', '6'], ['i', 'x', 'J', 'y', 'b'], ['i', 'x', 'J', '6', 'b'], ['i', 'x', 'y', '6', 'b'], ['i', 'J', 'y', '6', 'b'], ['x', 'J', 'y', '6', 'b']]