D1212121212131323331323231323132312323132322331311331323132333132322113121   >>    D121212121213132333132323132313231232313232233131133132313233313232211312   <<    D1212121212131323331323231323132312323132322331311331323132333132322113123   >>      D1212121212131323331323231323132312323132322331311331323132333132322113122   >>