Task: Program Execution
Input (English): b, D, 6, u, 9, 1
Output (English): [['b', 'D', '6', 'u', '9'], ['b', 'D', '6', 'u', '1'], ['b', 'D', '6', '9', '1'], ['b', 'D', 'u', '9', '1'], ['b', '6', 'u', '9', '1'], ['D', '6', 'u', '9', '1']]