D1212121212131323331323231323132312323132322331311331323223313231331123131   >>    D121212121213132333132323132313231232313232233131133132322331323133112313   <<    D1212121212131323331323231323132312323132322331311331323223313231331123133   >>      D1212121212131323331323231323132312323132322331311331323223313231331123132   >>