-ey a-a a-c aaa aac aae aao aay ac- aca acc ace aco acy aea aec aee aeo aey aoa aoc aoe aoo ay- aya ayc aye ayo c-- caa cac cae cao cay cca ccc cce cco ce- cea cec cee ceo cey co- coa coc coe coo coy cya cyc cye cyo eaa eac eae eao ec- eca ecc ece eco eea eec eee eeo eey eo- eoa eoc eoe eoo eya eyc eye eyo oaa oac oae oao oc- oca occ oco oea oec oee oeo oey oo- ooa ooc ooo oya oye oyo yaa yac yae yao yay yca ycc yce yco ycy yea yec yee yeo yey yoc yoe yoo yoy yyc yye yyy