-er -ey a-a a-c aaa aac aae aao aap aar aay ac- aca acc ace aco acp acr acy aea aec aee aeo aep aer aey aoa aoc aoe aoo aop aor ap- apa apc ape apo app apr apy ar- ara arc are aro arp arr ary ay- aya ayc aye ayo ayp ayr c-- caa cac cae cao cap car cay cca ccc cce cco ccp ccr ce- cea cec cee ceo cep cer cey co- coa coc coe coo cop cor coy cpa cpc cpe cpo cpp cpr cra crc cre cro crp crr cry cya cyc cye cyo cyp cyr eaa eac eae eao eap ear ec- eca ecc ece eco ecr eea eec eee eeo eep eer eey eo- eoa eoc eoe eoo eop eor ep- epa epc epe epo epp epr era erc ere ero erp err ery eya eyc eye eyo eyp eyr oaa oac oae oao oap oar oc- oca occ oco ocp ocr oea oec oee oeo oep oer oey oo- ooa ooc ooo oop oor op- opa opc ope opo opp opr opy or- ora orc ore oro orp orr ory oya oye oyo p-p paa pac pae pao pap par pay pca pcc pce pco pcp pcr pea pec pee peo pep per pey poa poc poe poo pop por poy ppa ppc ppe ppo ppp ppr pra prc pre pro prp prr pry py- pya pyc pye pyo pyr ra- raa rac rae rao rap rar ray rca rcc rce rco rcp rcr re- rea rec ree reo rep rer rey roa roc roe roo rop ror roy rpa rpc rpe rpo rpp rpr rra rrc rrp rrr ry- rya ryc rye ryo ryr ryy yaa yac yae yao yap yar yay yca ycc yce yco ycp ycy yea yec yee yeo yep yer yey yoc yoe yoo yop yor yoy ypa ypo yra yrc yre yro yrp yyc yye yyy