-er -ey c-- ccc ccd cce cck cco ccr cdc cdd cde cdk cdo cdr cdy ce- cec ced cee cek ceo cer cey ckc ckd cko cky co- coc cod coe cok coo cor coy crc crd cre crk cro crr cry cyc cyd cye cyk cyo cyr dcc dcd dce dck dco dcr ddc ddd dde ddk ddo ddr ddy de- dec ded dee dek deo der dey dkc dke dkk dko dkr doc dod doe dok doo dor doy drc drd dre drk dro drr dry dy- dyc dyd dye dyk dyo dyr dyy ec- ecc ecd ece eck eco ecr ed- edc edd ede edk edo edr edy eec eed eee eek eeo eer eey ekc ekd eke eko ekr eky eo- eoc eod eoe eok eoo eor erc erd ere erk ero err ery eyc eyd eye eyo eyr kcc kcd kce kck kcr kdc kde kdk kdo kdr kdy ke- kec ked kee kek keo ker key kkc kke kkk kkr kky koc kod koe kok koo kor koy krc krd krk kro krr kry kyc kyd kye kyo kyr oc- occ ocd ock oco ocr odc odd ode odo odr oec oed oee oeo oer oey okc okd oke okk oko okr oo- ooc ood ook ooo oor or- orc ord ore ork oro orr ory oyd oye oyo rcc rcd rce rco rcr rdc rdd rde rdo rdr rdy re- rec red ree rek reo rer rey rkc rke rkk rko rky roc rod roe rok roo ror roy rrc rrd rrk rrr ry- ryc ryd rye ryk ryo ryr ryy ycc ycd yce yco ycy yde ydo ydy yec yed yee yek yeo yer yey ykk yoc yod yoe yok yoo yor yoy yrc yre yro yyc yye yyy