Task: Program Execution
Input (English): 3, a, 2, 7, D, T
Output (English): [['3', 'a', '2', '7', 'D'], ['3', 'a', '2', '7', 'T'], ['3', 'a', '2', 'D', 'T'], ['3', 'a', '7', 'D', 'T'], ['3', '2', '7', 'D', 'T'], ['a', '2', '7', 'D', 'T']]