-er -ey c-- ccc cce cck ccm cco ccr ccs ce- cec cee cek cem ceo cer ces cey ckc ckm cko cks cky cmc cme cmk cmm cmo cmr cms cmy co- coc coe cok com coo cor cos coy crc cre crk crm cro crr crs cry csc cse csk csm cso csr css csy cyc cye cyk cym cyo cyr cys ec- ecc ece eck ecm eco ecr ecs eec eee eek eem eeo eer ees eey ekc eke eko ekr eks eky em- emc eme emk emm emo emr ems eo- eoc eoe eok eom eoo eor eos erc ere erk erm ero err ers ery es- esc ese esk esm eso esr ess esy eyc eye eym eyo eyr eys kcc kce kck kcm kcr kcs ke- kec kee kek kem keo ker kes key kkc kke kkk kkm kkr kks kky kmc kme kmk kmm kmo kms koc koe kok kom koo kor kos koy krc krk kro krr krs kry ksc kse ksk ksm kso ksr kss kyc kye kym kyo kyr kys m-o m-r mc- mcc mce mck mcm mco mcr mcs mec mee mek mem meo mer mes mey mkc mke mkk mkm mko mkr mks mky mmc mme mmk mmm mmo mmr mms moc moe mok mom moo mor mos moy mrc mre mrk mrm mro mrr mrs mry msc mse msk msm mso msr mss msy my- myc mye myk mym myo myr mys oc- occ ock ocm oco ocr ocs oec oee oem oeo oer oes oey okc oke okk oko okr oks om- omc ome omm omo omr oms omy oo- ooc ook oom ooo oor oos or- orc ore ork orm oro orr ors ory os- osc ose osk osm oso osr oss oye oyo oys rcc rce rcm rco rcr rcs re- rec ree rek rem reo rer res rey rkc rke rkk rkm rko rks rky rmc rme rmm rmo rmr rms roc roe rok rom roo ror ros roy rrc rrk rrm rrr rrs rsc rse rsk rsm rso rsr rss ry- ryc rye ryk rym ryo ryr rys ryy scc sce sck scm sco scr scs se- sec see sek sem seo ser ses sey sk- skc ske skk skm sko skr sks sky smc sme smk smm smo smr sms smy soc soe sok som soo sor sos soy sr- src sre srk srm sro srr srs sry ss- ssc sse ssk ssm sso ssr sss sy- syc sye syk sym syr sys ycc yce yco ycs ycy yec yee yek yem yeo yer yes yey ykk ykm ymc yme ymm ymo yms yoc yoe yok yom yoo yor yos yoy yrc yre yro yrs ysc yse ysk ysm yso ysr yss ysy yyc yye yys yyy