D1212132333131322331323331313131323132313331312323223313232211331   >>    D121213233313132233132333131313132313231333131232322331323221133   <<    D1212132333131322331323331313131323132313331312323223313232211333   >>      D1212132333131322331323331313131323132313331312323223313232211332   >>