a-a a-c a-t aaa aac aae aap aas aat aav ac- aca acc ace acp acs act acv aea aec aee aep aes aet aev ap- apa apc ape app aps apt apv as- asa asc ase asp ass ast asv at- ata atc ate atp ats att atv av- ava avc ave avp avs avt c-- caa cac cae cap cas cat cav cca ccc cce ccp ccs cct ccv ce- cea cec cee cep ces cet cev cpa cpc cpe cpp cps cpt cpv csa csc cse csp css cst csv cta ctc cte ctp cts ctt ctv cva cvc cve cvp cvs cvt cvv eaa eac eae eap eas eat eav ec- eca ecc ece ecs ect ecv eea eec eee eep ees eet eev ep- epa epc epe epp eps ept es- esa esc ese esp ess est esv eta etc ete etp ets ett etv eva evc eve evp evs evt evv p-p paa pac pae pap pas pat pav pca pcc pce pcp pcs pct pcv pea pec pee pep pes pet pev ppa ppc ppe ppp pps ppt ppv ps- psa psc pse psp pss pst psv pt- pta ptc pte ptp pts ptt ptv pva pvc pve pvp pvs pvt pvv saa sac sae sap sas sat sav sca scc sce scp scs sct scv se- sea sec see sep ses set sev spa spc spe spp sps spt spv ss- ssa ssc sse ssp sss sst ssv sta stc ste stp sts stt stv sva svc sve svp svs svt svv taa tac tae tap tas tat tav tca tcc tce tcp tcs tct tcv te- tea tec tee tep tes tet tev tpa tpc tpe tpp tps tpt tpv tsa tsc tse tsp tss tst tsv tta ttc tte ttp tts ttt ttv tva tvc tve tvp tvs tvt v-a v-e vaa vac vae vap vas vat vav vca vcc vce vcp vcs vct vea vec vee vep ves vet vpa vpc vpe vpp vps vpt vsa vsc vse vsp vss vst vsv vta vtc vte vts vtt vtv vva vvc vvs vvt vvv