-er -ey c-- ccc ccd cce cck ccr ccu cdc cdd cde cdk cdr cdu cdy ce- cec ced cee cek cer ceu cey ckc ckd cky crc crd cre crk crr cru cry cuc cud cue cuk cur cuu cuy cyc cyd cye cyk cyr dcc dcd dce dck dcr dcu ddc ddd dde ddk ddr ddu ddy de- dec ded dee dek der deu dey dkc dke dkk dkr dku drc drd dre drk drr dru dry duc dud due duk dur duy dy- dyc dyd dye dyk dyr dyu dyy ec- ecc ecd ece eck ecr ecu ed- edc edd ede edk edr edu edy eec eed eee eek eer eey ekc ekd eke ekr eku eky erc erd ere erk err eru ery eu- euc eud eue eur eyc eyd eye eyr kcc kcd kce kck kcr kcu kdc kde kdk kdr kdu kdy ke- kec ked kee kek ker key kkc kke kkk kkr kku kky krc krd krk krr kru kry kuc kud kue kuk kur kuu kuy kyc kyd kye kyr kyu rcc rcd rce rcr rcu rdc rdd rde rdr rdu rdy re- rec red ree rek rer reu rey rkc rke rkk rku rky rrc rrd rrk rrr rru ruc rud rue ruk rur ruu ruy ry- ryc ryd rye ryk ryr ryu ryy ucc ucd uce uck ucr ucu udc udd ude udk udr udu uec ued uee uer uey ukc uke ukk ukr uku ur- urc urd ure urk urr uru ury uuc uue uur uuu uyc uyu ycc ycd yce ycu ycy yde ydy yec yed yee yek yer yey ykk yrc yre yru yud yue yuk yur yuu yuy yyc yye yyu yyy