Task: Program Execution
Input (English): y, 9, 2, K, y, 4, 6
Output (English): [['y', '9', '2', 'K', 'y', '4'], ['y', '9', '2', 'K', 'y', '6'], ['y', '9', '2', 'K', '4', '6'], ['y', '9', '2', 'y', '4', '6'], ['y', '9', 'K', 'y', '4', '6'], ['y', '2', 'K', 'y', '4', '6'], ['9', '2', 'K', 'y', '4', '6']]