a-a aaa aae aaf aag aak aao aas aea aee aef aeg aek aeo aes af- afa afe aff afg afk afo afs ag- aga age agf agg agk ago ags aka ake akg akk ako aks aoa aoe aof aog aok aoo aos as- asa ase asf asg ask aso ass eaa eae eaf eag eak eao eas eea eee eef eeg eek eeo ees ef- efa efe eff efg efo efs ega ege egf egg ego egs eka eke ekf ekg eko eks eo- eoa eoe eof eog eok eoo eos es- esa ese esf esg esk eso ess faa fae faf fag fak fao fas fea fee fef feg fek feo fes ffa ffe fff ffg ffk ffo ffs fga fge fgf fgg fgs fka fkf fkg fkk foa foe fof fog fok foo fos fsa fse fsf fsg fsk fso fss gaa gae gaf gag gak gao gas ge- gea gee gef geg gek geo ges gfa gfe gff gfk gfo gfs gga ggg ggo ggs gka gko gks goa goe gof gog gok goo gos gsa gse gsf gsg gsk gso gss ka- kaa kae kaf kag kak kao kas ke- kea kee kef keg kek keo kes kfa kff kfg kfo kfs kga kgf kgo kgs kke kkk kks koa koe kof kog kok koo kos ksa kse ksf ksg ksk kso kss oaa oae oaf oag oak oao oas oea oee oef oeg oeo oes of- ofa ofe off ofg ofo ofs oga oge ogf ogg ogo ogs oka oke okg okk oko oks oo- ooa oof oog ook ooo oos os- osa ose osf osg osk oso oss saa sae saf sag sak sao sas se- sea see sef seg sek seo ses sfa sfe sff sfg sfk sfo sfs sga sge sgf sgg sgk sgo sgs sk- ska ske skf skg skk sko sks soa soe sof sog sok soo sos ss- ssa sse ssf ssg ssk sso sss