-er -ey c-- ccc cce cck cco ccr cct ce- cec cee cek ceo cer cet cey ckc cko ckt cky co- coc coe cok coo cor cot coy crc cre crk cro crr crt cry ctc cte ctk cto ctr ctt cty cyc cye cyk cyo cyr cyt ec- ecc ece eck eco ecr ect eec eee eek eeo eer eet eey ekc eke eko ekr ekt eky eo- eoc eoe eok eoo eor eot erc ere erk ero err ert ery etc ete etk eto etr ett ety eyc eye eyo eyr eyt k-t kcc kce kck kcr kct ke- kec kee kek keo ker ket key kkc kke kkk kkr kkt kky koc koe kok koo kor kot koy krc krk kro krr krt kry ktc kte ktk kto ktr ktt kyc kye kyo kyr kyt oc- occ ock oco ocr oct oec oee oeo oer oet oey okc oke okk oko okr oo- ooc ook ooo oor oot or- orc ore ork oro orr ort ory ot- otc ote otk oto otr ott oye oyo rcc rce rco rcr rct re- rec ree rek reo rer ret rey rkc rke rkk rko rkt rky roc roe rok roo ror rot roy rrc rrk rrr rrt rtc rte rtk rto rtr rtt rty ry- ryc rye ryk ryo ryr ryy tcc tce tck tco tcr tct te- tec tee tek teo ter tet tey tkc tke tkk tko tkr tkt tky to- toc toe tok too tor tot toy trc tre trk tro trr trt try ttc tte ttk tto ttr ttt tty tyc tye tyo tyr tyt ycc yce yco ycy yec yee yek yeo yer yet yey ykk yoc yoe yok yoo yor yot yoy yrc yre yro yrt ytc yte ytk yto ytr ytt yyc yye yyt yyy