a-a a-c a-t aaa aac aae aao aap aat aav ac- aca acc ace aco acp act acv aea aec aee aeo aep aet aev aoa aoc aoe aoo aop aot aov ap- apa apc ape apo app apt apv at- ata atc ate ato atp att atv av- ava avc ave avo avp avt c-- caa cac cae cao cap cat cav cca ccc cce cco ccp cct ccv ce- cea cec cee ceo cep cet cev co- coa coc coe coo cop cot cov cpa cpc cpe cpo cpp cpt cpv cta ctc cte cto ctp ctt ctv cva cvc cve cvo cvp cvt cvv eaa eac eae eao eap eat eav ec- eca ecc ece eco ect ecv eea eec eee eeo eep eet eev eo- eoa eoc eoe eoo eop eot ep- epa epc epe epo epp ept eta etc ete eto etp ett etv eva evc eve evo evp evt evv oaa oac oae oao oap oat oav oc- oca occ oco ocp oct ocv oea oec oee oeo oep oet oo- ooa ooc ooo oop oot oov op- opa opc ope opo opp opt opv ot- ota otc ote oto otp ott otv ov- ova ovc ove ovo ovp ovv p-p paa pac pae pao pap pat pav pca pcc pce pco pcp pct pcv pea pec pee peo pep pet pev poa poc poe poo pop pot pov ppa ppc ppe ppo ppp ppt ppv pt- pta ptc pte pto ptp ptt ptv pva pvc pve pvo pvp pvt pvv taa tac tae tao tap tat tav tca tcc tce tco tcp tct tcv te- tea tec tee teo tep tet tev to- toa toc toe too top tot tov tpa tpc tpe tpo tpp tpt tpv tta ttc tte tto ttp ttt ttv tva tvc tve tvo tvp tvt v-a v-e vaa vac vae vao vap vat vav vca vcc vce vco vcp vct vea vec vee veo vep vet voa voc voe voo vop vot vov vpa vpc vpe vpo vpp vpt vta vtc vte vto vtt vtv vva vvc vvo vvt vvv