(50, 0) (50, 5) (10, 5) (20, 20) (30, 20) (10, 25) (45, 45) (45, 50) (5, 50) (5, 45) (40, 45) (20, 25) (10, 20) (17, 20) (0, 5) (0, 0) (30, 25) (25, 25)