Task: Program Execution
Input (English): 4, 7, u, B, 6, 3, 5
Output (English): [['4', '7', 'u', 'B', '6', '3'], ['4', '7', 'u', 'B', '6', '5'], ['4', '7', 'u', 'B', '3', '5'], ['4', '7', 'u', '6', '3', '5'], ['4', '7', 'B', '6', '3', '5'], ['4', 'u', 'B', '6', '3', '5'], ['7', 'u', 'B', '6', '3', '5']]