Task: Program Execution
Input (English): A, U, 4, 1, 6, q, 7
Output (English): [['A', 'U', '4', '1', '6', 'q'], ['A', 'U', '4', '1', '6', '7'], ['A', 'U', '4', '1', 'q', '7'], ['A', 'U', '4', '6', 'q', '7'], ['A', 'U', '1', '6', 'q', '7'], ['A', '4', '1', '6', 'q', '7'], ['U', '4', '1', '6', 'q', '7']]