Task: Program Execution
Input (English): 8, 9, p, M, u, b
Output (English): [['8', '9', 'p', 'M', 'u'], ['8', '9', 'p', 'M', 'b'], ['8', '9', 'p', 'u', 'b'], ['8', '9', 'M', 'u', 'b'], ['8', 'p', 'M', 'u', 'b'], ['9', 'p', 'M', 'u', 'b']]