D1212121212131323331312323132322331313232233132313223313133112331   >>    D121212121213132333131232313232233131323223313231322331313311233   <<    D1212121212131323331312323132322331313232233132313223313133112333   >>      D1212121212131323331312323132322331313232233132313223313133112332   >>