Task: Program Execution
Input (English): K, 9, f, x, 2, 8
Output (English): [['K', '9', 'f', 'x', '2'], ['K', '9', 'f', 'x', '8'], ['K', '9', 'f', '2', '8'], ['K', '9', 'x', '2', '8'], ['K', 'f', 'x', '2', '8'], ['9', 'f', 'x', '2', '8']]