Task: Program Execution
Input (English): 7, 6, 3, 7, f, 1
Output (English): [['7', '6', '3', '7', 'f'], ['7', '6', '3', '7', '1'], ['7', '6', '3', 'f', '1'], ['7', '6', '7', 'f', '1'], ['7', '3', '7', 'f', '1'], ['6', '3', '7', 'f', '1']]