D1212132333131333131231323132313232213231323223313223313132313231211   >>    D121213233313133313123132313231323221323132322331322331313231323121   <<    D1212132333131333131231323132313232213231323223313223313132313231213   >>      D1212132333131333131231323132313232213231323223313223313132313231212   >>