Task: Program Execution
Input (English): 7, 7, 2, r, 5, 8
Output (English): [['7', '7', '2', 'r', '5'], ['7', '7', '2', 'r', '8'], ['7', '7', '2', '5', '8'], ['7', '7', 'r', '5', '8'], ['7', '2', 'r', '5', '8'], ['7', '2', 'r', '5', '8']]