a-a a-c aaa aac aae aao aap aav ac- aca acc ace aco acp acv aea aec aee aeo aep aev aoa aoc aoe aoo aop aov ap- apa apc ape apo app apv av- ava avc ave avo avp c-- caa cac cae cao cap cav cca ccc cce cco ccp ccv ce- cea cec cee ceo cep cev co- coa coc coe coo cop cov cpa cpc cpe cpo cpp cpv cva cvc cve cvo cvp cvv eaa eac eae eao eap eav ec- eca ecc ece eco ecv eea eec eee eeo eep eev eo- eoa eoc eoe eoo eop ep- epa epc epe epo epp eva evc eve evo evp evv oaa oac oae oao oap oav oc- oca occ oco ocp ocv oea oec oee oeo oep oo- ooa ooc ooo oop oov op- opa opc ope opo opp opv ov- ova ovc ove ovo ovp ovv p-p paa pac pae pao pap pav pca pcc pce pco pcp pcv pea pec pee peo pep pev poa poc poe poo pop pov ppa ppc ppe ppo ppp ppv pva pvc pve pvo pvp pvv v-a v-e vaa vac vae vao vap vav vca vcc vce vco vcp vea vec vee veo vep voa voc voe voo vop vov vpa vpc vpe vpo vpp vva vvc vvo vvv