-er -ey c-- ccc cce cck cco ccr cct ccu ce- cec cee cek ceo cer cet ceu cey ckc cko ckt cky co- coc coe cok coo cor cot cou coy crc cre crk cro crr crt cru cry ctc cte ctk cto ctr ctt ctu cty cuc cue cuk cuo cur cut cuu cuy cyc cye cyk cyo cyr cyt ec- ecc ece eck eco ecr ect ecu eec eee eek eeo eer eet eey ekc eke eko ekr ekt eku eky eo- eoc eoe eok eoo eor eot eou erc ere erk ero err ert eru ery etc ete etk eto etr ett etu ety eu- euc eue eur eut eyc eye eyo eyr eyt k-t kcc kce kck kcr kct kcu ke- kec kee kek keo ker ket key kkc kke kkk kkr kkt kku kky koc koe kok koo kor kot kou koy krc krk kro krr krt kru kry ktc kte ktk kto ktr ktt ktu kuc kue kuk kur kut kuu kuy kyc kye kyo kyr kyt kyu oc- occ ock oco ocr oct ocu oec oee oeo oer oet oey okc oke okk oko okr oku oo- ooc ook ooo oor oot or- orc ore ork oro orr ort oru ory ot- otc ote otk oto otr ott otu ou- ouc oue ouk ouo our out oye oyo rcc rce rco rcr rct rcu re- rec ree rek reo rer ret reu rey rkc rke rkk rko rkt rku rky roc roe rok roo ror rot rou roy rrc rrk rrr rrt rru rtc rte rtk rto rtr rtt rtu rty ruc rue ruk ruo rur rut ruu ruy ry- ryc rye ryk ryo ryr ryu ryy tcc tce tck tco tcr tct tcu te- tec tee tek teo ter tet teu tey tkc tke tkk tko tkr tkt tky to- toc toe tok too tor tot tou toy trc tre trk tro trr trt tru try ttc tte ttk tto ttr ttt ttu tty tuc tue tuk tuo tur tut tuu tuy tyc tye tyo tyr tyt ucc uce uck uco ucr uct ucu uec uee uer uet uey ukc uke ukk ukr uku uoc uoe uok uoo uor uot ur- urc ure urk uro urr urt uru ury utc ute utk uto utr utt utu uty uuc uue uur uut uuu uyc uyo uyu ycc yce yco ycu ycy yec yee yek yeo yer yet yey ykk yoc yoe yok yoo yor yot you yoy yrc yre yro yrt yru ytc yte ytk yto ytr ytt ytu yue yuk yuo yur yut yuu yuy yyc yye yyt yyu yyy