Task: Program Execution
Input (English): E, r, B, 7, 5, P
Output (English): [['E', 'r', 'B', '7', '5'], ['E', 'r', 'B', '7', 'P'], ['E', 'r', 'B', '5', 'P'], ['E', 'r', '7', '5', 'P'], ['E', 'B', '7', '5', 'P'], ['r', 'B', '7', '5', 'P']]