-er ddd dde ddf ddg ddk ddo ddr dds ddu de- ded dee def deg dek deo der des deu dfd dfe dff dfg dfk dfo dfr dfs dfu dgd dge dgf dgg dgk dgr dgs dgu dke dkg dkk dko dkr dks dku dod doe dof dog dok doo dor dos dou drd dre drg drk dro drr drs dru dsd dse dsf dsg dsk dso dsr dss dsu dud due duf dug duk duo dur dus ed- edd ede edf edg edk edo edr eds edu eed eee eef eeg eek eeo eer ees ef- efd efe eff efg efo efr efs egd ege egf egg ego egr egs egu ekd eke ekf ekg eko ekr eks eku eo- eod eoe eof eog eok eoo eor eos eou erd ere erf erg erk ero err ers eru es- esd ese esf esg esk eso esr ess esu eu- eud eue euf eug eur eus fdd fde fdf fdg fdk fdo fdr fds fdu fed fee fef feg fek feo fer fes feu ffd ffe fff ffg ffk ffo ffr ffs ffu fgd fge fgf fgg fgr fgs fkf fkg fkk foe fof fog fok foo for fos fou frd fre frf frg frk fro frr frs fru fsd fse fsf fsg fsk fso fsr fss fsu fud fue fuf fug fuk fuo fur fus fuu g-d gdd gde gdf gdk gdo gdr gds gdu ge- ged gee gef geg gek geo ger ges geu gfd gfe gff gfk gfo gfr gfs ggd ggg ggo ggr ggs ggu gkd gko gks god goe gof gog gok goo gor gos gou grd gre grf grg grk gro grr grs gru gsd gse gsf gsg gsk gso gsr gss gsu gu- gud gue guf gug guk guo gur gus guu kde kdf kdg kdk kdo kdr kds kdu ke- ked kee kef keg kek keo ker kes kfd kff kfg kfo kfs kfu kgd kgf kgo kgs kgu kke kkk kkr kks kku kod koe kof kog kok koo kor kos kou krd krf krg krk kro krr krs kru ksd kse ksf ksg ksk kso ksr kss ksu kud kue kug kuk kur kus kuu 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 okd oke okg okk oko okr oks oku oo- ood oof oog ook ooo oor oos or- ord ore orf org ork oro orr ors oru os- osd ose osf osg osk oso osr oss osu ou- oud oue ouf ouk ouo our ous rdd rde rdf rdg rdo rdr rds rdu re- red ree ref reg rek reo rer res reu rfd rfe rff rfg rfk rfo rfr rfs rfu rgd rge rgf rgg rgk rgo rgr rgs rke rkf rkg rkk rko rks rku rod roe rof rog rok roo ror ros rou rrd rrf rrg rrk rrr rrs rru rsd rse rsf rsg rsk rso rsr rss rsu rud rue ruf rug ruk ruo rur rus ruu sdd sde sdf sdg sdk sdo sdr sds sdu se- sed see sef seg sek seo ser ses seu sfd sfe sff sfg sfk sfo sfr sfs sfu sgd sge sgf sgg sgk sgo sgr sgs sgu sk- skd ske skf skg skk sko skr sks sku sod soe sof sog sok soo sor sos sou sr- srd sre srf srg srk sro srr srs ss- ssd sse ssf ssg ssk sso ssr sss ssu sud sue suf sug suk suo sur sus suu udd ude udf udg udk udo udr uds udu ued uee uef ueg uer ues ufd ufe uff ufg ufo ufr ufs ufu uge ugf ugg ugk ugo ugr ugs ugu uke ukf ukk ukr uku uod uoe uog uok uoo uor uos ur- urd ure urf urg urk uro urr urs uru usd use usf usg usk uso usr uss usu uue uug uur uus uuu