a-a a-c a-t aaa aac aao aap aar aat aav ac- aca acc aco acp acr act acv aoa aoc aoo aop aor aot aov ap- apa apc apo app apr apt apv ar- ara arc aro arp arr art arv at- ata atc ato atp atr att atv av- ava avc avo avp avr avt c-- caa cac cao cap car cat cav cca ccc cco ccp ccr cct ccv co- coa coc coo cop cor cot cov cpa cpc cpo cpp cpr cpt cpv cra crc cro crp crr crt crv cta ctc cto ctp ctr ctt ctv cva cvc cvo cvp cvr cvt cvv oaa oac oao oap oar oat oav oc- oca occ oco ocp ocr oct ocv oo- ooa ooc ooo oop oor oot oov op- opa opc opo opp opr opt opv or- ora orc oro orp orr ort orv ot- ota otc oto otp otr ott otv ov- ova ovc ovo ovp ovv p-p paa pac pao pap par pat pav pca pcc pco pcp pcr pct pcv poa poc poo pop por pot pov ppa ppc ppo ppp ppr ppt ppv pra prc pro prp prr prt prv pt- pta ptc pto ptp ptr ptt ptv pva pvc pvo pvp pvr pvt pvv ra- raa rac rao rap rar rat rav rca rcc rco rcp rcr rct rcv roa roc roo rop ror rot rov rpa rpc rpo rpp rpr rpt rpv rra rrc rrp rrr rrt rta rtc rto rtp rtr rtt rtv rva rvc rvo rvp rvr rvt rvv taa tac tao tap tar tat tav tca tcc tco tcp tcr tct tcv to- toa toc too top tor tot tov tpa tpc tpo tpp tpr tpt tpv tra trc tro trp trr trt trv tta ttc tto ttp ttr ttt ttv tva tvc tvo tvp tvr tvt v-a vaa vac vao vap var vat vav vca vcc vco vcp vcr vct voa voc voo vop vor vot vov vpa vpc vpo vpp vpr vpt vra vrc vrp vrr vrt vta vtc vto vtr vtt vtv vva vvc vvo vvr vvt vvv