Task: Program Execution
Input (English): 6, 1, n, 1, 2, 9, 8
Output (English): [['6', '1', 'n', '1', '2', '9'], ['6', '1', 'n', '1', '2', '8'], ['6', '1', 'n', '1', '9', '8'], ['6', '1', 'n', '2', '9', '8'], ['6', '1', '1', '2', '9', '8'], ['6', 'n', '1', '2', '9', '8'], ['1', 'n', '1', '2', '9', '8']]