-er -ey a-a a-c aaa aac aae aak aar aay ac- aca acc ace ack acr acy aea aec aee aek aer aey aka akc ake akk akr ar- ara arc are ark arr ary ay- aya ayc aye ayk ayr c-- caa cac cae cak car cay cca ccc cce cck ccr ce- cea cec cee cek cer cey cka ckc cky cra crc cre crk crr cry cya cyc cye cyk cyr eaa eac eae eak ear ec- eca ecc ece eck ecr eea eec eee eek eer eey eka ekc eke ekr eky era erc ere erk err ery eya eyc eye eyr ka- kaa kac kae kak kar kay kca kcc kce kck kcr ke- kea kec kee kek ker key kkc kke kkk kkr kky kra krc krk krr kry kya kyc kye kyr ra- raa rac rae rak rar ray rca rcc rce rcr re- rea rec ree rek rer rey rkc rke rkk rky rra rrc rrk rrr ry- rya ryc rye ryk ryr ryy yaa yac yae yak yar yay yca ycc yce ycy yea yec yee yek yer yey yka ykk yra yrc yre yyc yye yyy