-er -ey c-- ccc cce cck ccm cco ccr ce- cec cee cek cem ceo cer cey ckc ckm cko cky cmc cme cmk cmm cmo cmr cmy co- coc coe cok com coo cor coy crc cre crk crm cro crr cry cyc cye cyk cym cyo cyr ec- ecc ece eck ecm eco ecr eec eee eek eem eeo eer eey ekc eke eko ekr eky em- emc eme emk emm emo emr eo- eoc eoe eok eom eoo eor erc ere erk erm ero err ery eyc eye eym eyo eyr kcc kce kck kcm kcr ke- kec kee kek kem keo ker key kkc kke kkk kkm kkr kky kmc kme kmk kmm kmo koc koe kok kom koo kor koy krc krk kro krr kry kyc kye kym kyo kyr m-o m-r mc- mcc mce mck mcm mco mcr mec mee mek mem meo mer mey mkc mke mkk mkm mko mkr mky mmc mme mmk mmm mmo mmr moc moe mok mom moo mor moy mrc mre mrk mrm mro mrr mry my- myc mye myk mym myo myr oc- occ ock ocm oco ocr oec oee oem oeo oer oey okc oke okk oko okr om- omc ome omm omo omr omy oo- ooc ook oom ooo oor or- orc ore ork orm oro orr ory oye oyo rcc rce rcm rco rcr re- rec ree rek rem reo rer rey rkc rke rkk rkm rko rky rmc rme rmm rmo rmr roc roe rok rom roo ror roy rrc rrk rrm rrr ry- ryc rye ryk rym ryo ryr ryy ycc yce yco ycy yec yee yek yem yeo yer yey ykk ykm ymc yme ymm ymo yoc yoe yok yom yoo yor yoy yrc yre yro yyc yye yyy