-er -ey c-- ccc cce ccg cck cco ccr ccs ce- cec cee ceg cek ceo cer ces cey cgc cge cgg cgo cgr cgs cgy ckc cko cks cky co- coc coe cog cok coo cor cos coy crc cre crg crk cro crr crs cry csc cse csg csk cso csr css csy cyc cye cyg cyk cyo cyr cys ec- ecc ece ecg eck eco ecr ecs eec eee eeg eek eeo eer ees eey egc ege egg ego egr egs egy ekc eke ekg eko ekr eks eky eo- eoc eoe eog eok eoo eor eos erc ere erg erk ero err ers ery es- esc ese esg esk eso esr ess esy eyc eye eyo eyr eys gcc gce gcg gck gco gcr gcs ge- gec gee geg gek geo ger ges gey ggc ggg ggo ggr ggs gko gks goc goe gog gok goo gor gos goy grc gre grg grk gro grr grs gry gsc gse gsg gsk gso gsr gss gy- gye gyo gyr gys kcc kce kcg kck kcr kcs ke- kec kee keg kek keo ker kes key kgc kgo kgs kgy kkc kke kkk kkr kks kky koc koe kog kok koo kor kos koy krc krg krk kro krr krs kry ksc kse ksg ksk kso ksr kss kyc kye kyo kyr kys oc- occ ocg ock oco ocr ocs oec oee oeg oeo oer oes oey ogc oge ogg ogo ogs ogy okc oke okg okk oko okr oks oo- ooc oog ook ooo oor oos or- orc ore org ork oro orr ors ory os- osc ose osg osk oso osr oss oye oyo oys rcc rce rcg rco rcr rcs re- rec ree reg rek reo rer res rey rgc rge rgg rgk rgo rgr rgs rkc rke rkg rkk rko rks rky roc roe rog rok roo ror ros roy rrc rrg rrk rrr rrs rsc rse rsg rsk rso rsr rss ry- ryc rye ryg ryk ryo ryr rys ryy scc sce scg sck sco scr scs se- sec see seg sek seo ser ses sey sgc sge sgg sgk sgo sgr sgs sk- skc ske skg skk sko skr sks sky soc soe sog sok soo sor sos soy sr- src sre srg srk sro srr srs sry ss- ssc sse ssg ssk sso ssr sss sy- syc sye syg syk syr sys ycc yce yco ycs ycy yec yee yeg yek yeo yer yes yey ygc ygo ykk yoc yoe yog yok yoo yor yos yoy yrc yre yrg yro yrs ysc yse ysg ysk yso ysr yss ysy yyc yye yyg yys yyy