-er -ey c-- ccc cce cch cck cco ccr ccs ce- cec cee ceh cek ceo cer ces cey ch- chc che chh chk cho chr chs chy ckc ckh cko cks cky co- coc coe coh cok coo cor cos coy crc cre crh crk cro crr crs cry csc cse csh csk cso csr css csy cyc cye cyk cyo cyr cys ec- ecc ece ech eck eco ecr ecs eec eee eek eeo eer ees eey ehc ehe ehh eho ehr ehs ekc eke ekh eko ekr eks eky eo- eoc eoe eoh eok eoo eor eos erc ere erh erk ero err ers ery es- esc ese esh esk eso esr ess esy eyc eye eyo eyr eys hcc hce hch hck hco hcr hcs hcy he- hec hee heh hek heo her hes hey hhc hhe hhh hhk hho hhr hhs hhy hkh hkk hko hkr hks hoc hoe hoh hok hoo hor hos hoy hr- hrc hre hrh hrk hro hrr hrs hsc hse hsh hsk hsr hss hsy hy- hyc hye hyh hyo hyr hys hyy kcc kce kch kck kcr kcs ke- kec kee keh kek keo ker kes key khe khh khk kho khr khs kkc kke kkh kkk kkr kks kky koc koe koh kok koo kor kos koy krc krk kro krr krs kry ksc kse ksh ksk kso ksr kss kyc kye kyo kyr kys oc- occ och ock oco ocr ocs oec oee oeh oeo oer oes oey ohc ohe ohh oho ohr ohs okc oke okk oko okr oks oo- ooc ooh ook ooo oor oos or- orc ore orh ork oro orr ors ory os- osc ose osh osk oso osr oss oye oyo oys rcc rce rch rco rcr rcs re- rec ree reh rek reo rer res rey rh- rhc rhe rhh rho rhr rhs rkc rke rkk rko rks rky roc roe roh rok roo ror ros roy rrc rrh rrk rrr rrs rsc rse rsh rsk rso rsr rss ry- ryc rye ryk ryo ryr rys ryy scc sce sch sck sco scr scs se- sec see seh sek seo ser ses sey sh- shc she shh shk sho shr shs shy sk- skc ske skh skk sko skr sks sky soc soe soh sok soo sor sos soy sr- src sre srh srk sro srr srs sry ss- ssc sse ssh ssk sso ssr sss sy- syc sye syh syk syr sys ycc yce ych yco ycs ycy yec yee yeh yek yeo yer yes yey yhc yhe yhs ykk yoc yoe yok yoo yor yos yoy yrc yre yro yrs ysc yse ysk yso ysr yss ysy yyc yye yys yyy