-er ddd dde ddf ddg ddo ddr dds ddu de- ded dee def deg deo der des deu dfd dfe dff dfg dfo dfr dfs dfu dgd dge dgf dgg dgr dgs dgu dod doe dof dog doo dor dos dou drd dre drg dro drr drs dru dsd dse dsf dsg dso dsr dss dsu dud due duf dug duo dur dus ed- edd ede edf edg edo edr eds edu eed eee eef eeg eeo eer ees ef- efd efe eff efg efo efr efs egd ege egf egg ego egr egs egu eo- eod eoe eof eog eoo eor eos eou erd ere erf erg ero err ers eru es- esd ese esf esg eso esr ess esu eu- eud eue euf eug eur eus fdd fde fdf fdg fdo fdr fds fdu fed fee fef feg feo fer fes feu ffd ffe fff ffg ffo ffr ffs ffu fgd fge fgf fgg fgr fgs foe fof fog foo for fos fou frd fre frf frg fro frr frs fru fsd fse fsf fsg fso fsr fss fsu fud fue fuf fug fuo fur fus fuu g-d gdd gde gdf gdo gdr gds gdu ge- ged gee gef geg geo ger ges geu gfd gfe gff gfo gfr gfs ggd ggg ggo ggr ggs ggu god goe gof gog goo gor gos gou grd gre grf grg gro grr grs gru gsd gse gsf gsg gso gsr gss gsu gu- gud gue guf gug guo gur gus guu odd ode odf odg odo odr ods odu oed oee oef oeg oeo oer oes of- ofd ofe off ofg ofo ofr ofs ofu ogd oge ogf ogg ogo ogs oo- ood oof oog ooo oor oos or- ord ore orf org oro orr ors oru os- osd ose osf osg oso osr oss osu ou- oud oue ouf ouo our ous rdd rde rdf rdg rdo rdr rds rdu re- red ree ref reg reo rer res reu rfd rfe rff rfg rfo rfr rfs rfu rgd rge rgf rgg rgo rgr rgs rod roe rof rog roo ror ros rou rrd rrf rrg rrr rrs rru rsd rse rsf rsg rso rsr rss rsu rud rue ruf rug ruo rur rus ruu sdd sde sdf sdg sdo sdr sds sdu se- sed see sef seg seo ser ses seu sfd sfe sff sfg sfo sfr sfs sfu sgd sge sgf sgg sgo sgr sgs sgu sod soe sof sog soo sor sos sou sr- srd sre srf srg sro srr srs ss- ssd sse ssf ssg sso ssr sss ssu sud sue suf sug suo sur sus suu udd ude udf udg udo udr uds udu ued uee uef ueg uer ues ufd ufe uff ufg ufo ufr ufs ufu uge ugf ugg ugo ugr ugs ugu uod uoe uog uoo uor uos ur- urd ure urf urg uro urr urs uru usd use usf usg uso usr uss usu uue uug uur uus uuu