Task: Program Execution
Input (English): 2, 9, 6, u, 4, 2, o
Output (English): [['2', '9', '6', 'u', '4', '2'], ['2', '9', '6', 'u', '4', 'o'], ['2', '9', '6', 'u', '2', 'o'], ['2', '9', '6', '4', '2', 'o'], ['2', '9', 'u', '4', '2', 'o'], ['2', '6', 'u', '4', '2', 'o'], ['9', '6', 'u', '4', '2', 'o']]