D1212121212131323331323231323132312323132322331311331323223313231111321   >>    D121212121213132333132323132313231232313232233131133132322331323111132   <<    D1212121212131323331323231323132312323132322331311331323223313231111323   >>      D1212121212131323331323231323132312323132322331311331323223313231111322   >>