-er eee eeg eek eeo eer ees ege egg ego egr egs eke ekg eko ekr eks eo- eoe eog eok eoo eor eos ere erg erk ero err ers es- ese esg esk eso esr ess ge- gee geg gek geo ger ges ggg ggo ggr ggs gko gks goe gog gok goo gor gos gre grg grk gro grr grs gse gsg gsk gso gsr gss ke- kee keg kek keo ker kes kgo kgs kke kkk kkr kks koe kog kok koo kor kos krg krk kro krr krs kse ksg ksk kso ksr kss oee oeg oeo oer oes oge ogg ogo ogs oke okg okk oko okr oks oo- oog ook ooo oor oos or- ore org ork oro orr ors os- ose osg osk oso osr oss re- ree reg rek reo rer res rge rgg rgk rgo rgr rgs rke rkg rkk rko rks roe rog rok roo ror ros rrg rrk rrr rrs rse rsg rsk rso rsr rss se- see seg sek seo ser ses sge sgg sgk sgo sgr sgs sk- ske skg skk sko skr sks soe sog sok soo sor sos sr- sre srg srk sro srr srs ss- sse ssg ssk sso ssr sss