Task: Program Execution
Input (English): 2, K, 3, f, 7, e
Output (English): [['2', 'K', '3', 'f', '7'], ['2', 'K', '3', 'f', 'e'], ['2', 'K', '3', '7', 'e'], ['2', 'K', 'f', '7', 'e'], ['2', '3', 'f', '7', 'e'], ['K', '3', 'f', '7', 'e']]