D1212121212131323331323231323132312323132322331311331323223313233112111   >>    D121212121213132333132323132313231232313232233131133132322331323311211   <<    D1212121212131323331323231323132312323132322331311331323223313233112113   >>      D1212121212131323331323231323132312323132322331311331323223313233112112   >>