Task: Program Execution
Input (English): l, s, 6, 7, s, n, 0
Output (English): [['l', 's', '6', '7', 's', 'n'], ['l', 's', '6', '7', 's', '0'], ['l', 's', '6', '7', 'n', '0'], ['l', 's', '6', 's', 'n', '0'], ['l', 's', '7', 's', 'n', '0'], ['l', '6', '7', 's', 'n', '0'], ['s', '6', '7', 's', 'n', '0']]