-er -ey c-- ccc cce cch cck cco ccr ce- cec cee ceh cek ceo cer cey ch- chc che chh chk cho chr chy ckc ckh cko cky co- coc coe coh cok coo cor coy crc cre crh crk cro crr cry cyc cye cyk cyo cyr ec- ecc ece ech eck eco ecr eec eee eek eeo eer eey ehc ehe ehh eho ehr ekc eke ekh eko ekr eky eo- eoc eoe eoh eok eoo eor erc ere erh erk ero err ery eyc eye eyo eyr hcc hce hch hck hco hcr hcy he- hec hee heh hek heo her hey hhc hhe hhh hhk hho hhr hhy hkh hkk hko hkr hoc hoe hoh hok hoo hor hoy hr- hrc hre hrh hrk hro hrr hy- hyc hye hyh hyo hyr hyy kcc kce kch kck kcr ke- kec kee keh kek keo ker key khe khh khk kho khr kkc kke kkh kkk kkr kky koc koe koh kok koo kor koy krc krk kro krr kry kyc kye kyo kyr oc- occ och ock oco ocr oec oee oeh oeo oer oey ohc ohe ohh oho ohr okc oke okk oko okr oo- ooc ooh ook ooo oor or- orc ore orh ork oro orr ory oye oyo rcc rce rch rco rcr re- rec ree reh rek reo rer rey rh- rhc rhe rhh rho rhr rkc rke rkk rko rky roc roe roh rok roo ror roy rrc rrh rrk rrr ry- ryc rye ryk ryo ryr ryy ycc yce ych yco ycy yec yee yeh yek yeo yer yey yhc yhe ykk yoc yoe yok yoo yor yoy yrc yre yro yyc yye yyy