D1212121212131323331323231323132312323132322331311331323223313231331123231   >>    D121212121213132333132323132313231232313232233131133132322331323133112323   <<    D1212121212131323331323231323132312323132322331311331323223313231331123233   >>      D1212121212131323331323231323132312323132322331311331323223313231331123232   >>