Task: Program Execution
Input (English): 8, 1, 4, 3, 6, b
Output (English): [['8', '1', '4', '3', '6'], ['8', '1', '4', '3', 'b'], ['8', '1', '4', '6', 'b'], ['8', '1', '3', '6', 'b'], ['8', '4', '3', '6', 'b'], ['1', '4', '3', '6', 'b']]