-ey a-a a-c aaa aac aae aao aap aay ac- aca acc ace aco acp acy aea aec aee aeo aep aey aoa aoc aoe aoo aop ap- apa apc ape apo app apy ay- aya ayc aye ayo ayp c-- caa cac cae cao cap cay cca ccc cce cco ccp ce- cea cec cee ceo cep cey co- coa coc coe coo cop coy cpa cpc cpe cpo cpp cya cyc cye cyo cyp eaa eac eae eao eap ec- eca ecc ece eco eea eec eee eeo eep eey eo- eoa eoc eoe eoo eop ep- epa epc epe epo epp eya eyc eye eyo eyp oaa oac oae oao oap oc- oca occ oco ocp oea oec oee oeo oep oey oo- ooa ooc ooo oop op- opa opc ope opo opp opy oya oye oyo p-p paa pac pae pao pap pay pca pcc pce pco pcp pea pec pee peo pep pey poa poc poe poo pop poy ppa ppc ppe ppo ppp py- pya pyc pye pyo yaa yac yae yao yap yay yca ycc yce yco ycp ycy yea yec yee yeo yep yey yoc yoe yoo yop yoy ypa ypo yyc yye yyy