Task: Program Execution
Input (English): K, 7, 4, P, 6, T, a
Output (English): [['K', '7', '4', 'P', '6', 'T'], ['K', '7', '4', 'P', '6', 'a'], ['K', '7', '4', 'P', 'T', 'a'], ['K', '7', '4', '6', 'T', 'a'], ['K', '7', 'P', '6', 'T', 'a'], ['K', '4', 'P', '6', 'T', 'a'], ['7', '4', 'P', '6', 'T', 'a']]