-ey a-a a-c aaa aac aae aak aao aap aay ac- aca acc ace ack aco acp acy aea aec aee aek aeo aep aey aka akc ake akk ako akp aoa aoc aoe aok aoo aop ap- apa apc ape apk apo app apy ay- aya ayc aye ayk ayo ayp c-- caa cac cae cak cao cap cay cca ccc cce cck cco ccp ce- cea cec cee cek ceo cep cey cka ckc cko cky co- coa coc coe cok coo cop coy cpa cpc cpe cpk cpo cpp cya cyc cye cyk cyo cyp eaa eac eae eak eao eap ec- eca ecc ece eck eco eea eec eee eek eeo eep eey eka ekc eke eko ekp eky eo- eoa eoc eoe eok eoo eop ep- epa epc epe epo epp eya eyc eye eyo eyp ka- kaa kac kae kak kao kap kay kca kcc kce kck kcp ke- kea kec kee kek keo kep key kkc kke kkk kkp kky koa koc koe kok koo kop koy kpa kpc kpe kpk kpo kpp kya kyc kye kyo kyp oaa oac oae oak oao oap oc- oca occ ock oco ocp oea oec oee oeo oep oey oka okc oke okk oko okp oo- ooa ooc ook ooo oop op- opa opc ope opk opo opp opy oya oye oyo p-p paa pac pae pak pao pap pay pca pcc pce pck pco pcp pea pec pee pek peo pep pey pka pkc pke pko pkp pky poa poc poe pok poo pop poy ppa ppc ppe ppk ppo ppp py- pya pyc pye pyk pyo yaa yac yae yak yao yap yay yca ycc yce yco ycp ycy yea yec yee yek yeo yep yey yka ykk yoc yoe yok yoo yop yoy ypa ypo yyc yye yyy