Task: Program Execution
Input (English): q, D, S, 4, 7, D
Output (English): [['q', 'D', 'S', '4', '7'], ['q', 'D', 'S', '4', 'D'], ['q', 'D', 'S', '7', 'D'], ['q', 'D', '4', '7', 'D'], ['q', 'S', '4', '7', 'D'], ['D', 'S', '4', '7', 'D']]