Task: Program Execution
Input (English): 7, b, r, B, 7
Output (English): [['7', 'b', 'r', 'B'], ['7', 'b', 'r', '7'], ['7', 'b', 'B', '7'], ['7', 'r', 'B', '7'], ['b', 'r', 'B', '7']]