Task: Program Execution
Input (English): v, f, 1, B, D, 4, k
Output (English): [['v', 'f', '1', 'B', 'D', '4'], ['v', 'f', '1', 'B', 'D', 'k'], ['v', 'f', '1', 'B', '4', 'k'], ['v', 'f', '1', 'D', '4', 'k'], ['v', 'f', 'B', 'D', '4', 'k'], ['v', '1', 'B', 'D', '4', 'k'], ['f', '1', 'B', 'D', '4', 'k']]