Task: Program Execution
Input (English): k, a, 5, 4, 2, 7, s
Output (English): [['k', 'a', '5', '4', '2', '7'], ['k', 'a', '5', '4', '2', 's'], ['k', 'a', '5', '4', '7', 's'], ['k', 'a', '5', '2', '7', 's'], ['k', 'a', '4', '2', '7', 's'], ['k', '5', '4', '2', '7', 's'], ['a', '5', '4', '2', '7', 's']]