D1212121212131323223313233231323331313232213231333132313132313231322321   >>    D121212121213132322331323323132333131323221323133313231313231323132232   <<    D1212121212131323223313233231323331313232213231333132313132313231322323   >>      D1212121212131323223313233231323331313232213231333132313132313231322322   >>