a-a a-c aaa aac aae aak aao aap aav ac- aca acc ace ack aco acp acv aea aec aee aek aeo aep aev aka akc ake akk ako akp akv aoa aoc aoe aok aoo aop aov ap- apa apc ape apk apo app apv av- ava avc ave avk avo avp c-- caa cac cae cak cao cap cav cca ccc cce cck cco ccp ccv ce- cea cec cee cek ceo cep cev cka ckc cko co- coa coc coe cok coo cop cov cpa cpc cpe cpk cpo cpp cpv cva cvc cve cvk cvo cvp cvv eaa eac eae eak eao eap eav ec- eca ecc ece eck eco ecv eea eec eee eek eeo eep eev eka ekc eke eko ekp ekv eo- eoa eoc eoe eok eoo eop ep- epa epc epe epo epp eva evc eve evo evp evv ka- kaa kac kae kak kao kap kav kca kcc kce kck kcp ke- kea kec kee kek keo kep kev kkc kke kkk kkp kkv koa koc koe kok koo kop kpa kpc kpe kpk kpo kpp kpv kva kvk kvo kvp kvv oaa oac oae oak oao oap oav oc- oca occ ock oco ocp ocv oea oec oee oeo oep oka okc oke okk oko okp oo- ooa ooc ook ooo oop oov op- opa opc ope opk opo opp opv ov- ova ovc ove ovo ovp ovv p-p paa pac pae pak pao pap pav pca pcc pce pck pco pcp pcv pea pec pee pek peo pep pev pka pkc pke pko pkp poa poc poe pok poo pop pov ppa ppc ppe ppk ppo ppp ppv pva pvc pve pvk pvo pvp pvv v-a v-e vaa vac vae vak vao vap vav vca vcc vce vco vcp vea vec vee vek veo vep vka vkp voa voc voe vok voo vop vov vpa vpc vpe vpk vpo vpp vva vvc vvo vvv