Task: Program Execution
Input (English): n, d, 4, x, 5, j
Output (English): [['n', 'd', '4', 'x', '5'], ['n', 'd', '4', 'x', 'j'], ['n', 'd', '4', '5', 'j'], ['n', 'd', 'x', '5', 'j'], ['n', '4', 'x', '5', 'j'], ['d', '4', 'x', '5', 'j']]