Task: Program Execution
Input (English): 1, 7, 7, 2, I, T
Output (English): [['1', '7', '7', '2', 'I'], ['1', '7', '7', '2', 'T'], ['1', '7', '7', 'I', 'T'], ['1', '7', '2', 'I', 'T'], ['1', '7', '2', 'I', 'T'], ['7', '7', '2', 'I', 'T']]