Task: Program Execution
Input (English): 9, 2, n, 2, 3, n
Output (English): [['9', '2', 'n', '2', '3'], ['9', '2', 'n', '2', 'n'], ['9', '2', 'n', '3', 'n'], ['9', '2', '2', '3', 'n'], ['9', 'n', '2', '3', 'n'], ['2', 'n', '2', '3', 'n']]