D1212121212131323331312323132322331313232233132313223313231132111   >>    D121212121213132333131232313232233131323223313231322331323113211   <<    D1212121212131323331312323132322331313232233132313223313231132113   >>      D1212121212131323331312323132322331313232233132313223313231132112   >>