R+C2-1R+C2-2R+C2-3R+C2-4R+C2-5R+C-1R+C-2R+C2-6R+C2-7R+C2-8R+C-3R+C-4R+C-5R+C2-9R+C-6R+C-7R+C-8R+C-9R+C4-1R+C4-2