D1212121212131323331312323132322331313232233132313223313233313231121132211   >>    D121212121213132333131232313232233131323223313231322331323331323112113221   <<    D1212121212131323331312323132322331313232233132313223313233313231121132213   >>      D1212121212131323331312323132322331313232233132313223313233313231121132212   >>