D1212121212131323331323231323132312323132322331311331323132333132321231   >>    D121212121213132333132323132313231232313232233131133132313233313232123   <<    D1212121212131323331323231323132312323132322331311331323132333132321233   >>      D1212121212131323331323231323132312323132322331311331323132333132321232   >>