D1212121212131323331312323132322331313232233132322331311331323122311   >>    D121212121213132333131232313232233131323223313232233131133132312231   <<    D1212121212131323331312323132322331313232233132322331311331323122313   >>      D1212121212131323331312323132322331313232233132322331311331323122312   >>