Task: Program Execution
Input (English): G, x, C, M, 7, q, D
Output (English): [['G', 'x', 'C', 'M', '7', 'q'], ['G', 'x', 'C', 'M', '7', 'D'], ['G', 'x', 'C', 'M', 'q', 'D'], ['G', 'x', 'C', '7', 'q', 'D'], ['G', 'x', 'M', '7', 'q', 'D'], ['G', 'C', 'M', '7', 'q', 'D'], ['x', 'C', 'M', '7', 'q', 'D']]