-vac aaaa aaac aaap aaav aaca aacc aaco aacp aact aacv aaoo aapa aapc aapo aapt aata aatc aatt aava ac-t acaa acac acap acat acca accc acco accp acct acoa acop acot acpa acpt acta actc acto actt actv acvv aoca aopo aotc apac apao apap apat apca apcc apco apo- apoc apoo apop apot appa appc appt apta aptc aptt aptv at-t ataa atac atap atat atca atcc atco atoc atop atot atta atto attp avao avat avcc avco avot avva avvo caaa caac caap caat cac- caca cacc caco capa capc capo capp capt cat- cata catc cato catt catv cava cavo ccaa ccac ccap ccat ccca cccc cccp cccv ccoc ccpa ccpp cctc cctt cctv ccvo coat coca coco cocp coct coop coot copa copo copp copt cota cotc coto cott cova covo cpaa cpac cpap cpca cppa cptp cpvc cpvt ctca ctcp ctot ctpo ctpp ctta ctvo ctvt cvac cvca cvcc ocac ocap ocat occa occc occt ocpa ocpp oct- octa octo ooaa oooo ootp opap opca opo- oppa oppo opto otac otap oto- otoo otov otpp otta otto ovo- ovoo ovot ovpp paap paat paca paco pact paoc papa papp pata pato patt pava pavo pcaa pcap pcca pccc pcoa pcpp pctv poat poca poco poop poot pop- popa popc popo popp popt pota potc poto pott povo ppac ppap ppcc ppoa pppa pppo pppp ppta pptt pptv ptca ptcc ptop pttc pvco pvpa taa- taat taca tacc taco tact tacv taoa tapa tapo tapp tapt tata tato tatt tatv tava tavo tcap tcca tccc tcov tcpa tcpo tctc toat toca toco tooa toot top- topa topo topp topt topv tota totc toto tott tova tovo tpac tpap tpcp tppa tppp tptp ttcp ttop tttt tvac tvpa tvtv vaat vaca vaco vapa vata vato vatt vava vcat voat voca vooc voot vopt vota voto votp vpat vtac vtap vvvv