Task: Program Execution
Input (English): 8, 9, c, b, 0, U
Output (English): [['8', '9', 'c', 'b', '0'], ['8', '9', 'c', 'b', 'U'], ['8', '9', 'c', '0', 'U'], ['8', '9', 'b', '0', 'U'], ['8', 'c', 'b', '0', 'U'], ['9', 'c', 'b', '0', 'U']]