Task: Program Execution
Input (English): D, 1, 8, m, N, 7
Output (English): [['D', '1', '8', 'm', 'N'], ['D', '1', '8', 'm', '7'], ['D', '1', '8', 'N', '7'], ['D', '1', 'm', 'N', '7'], ['D', '8', 'm', 'N', '7'], ['1', '8', 'm', 'N', '7']]