-vac aaaa aaac aaav aaca aacc aaco aact aacv aaoo aata aatc aatt aava ac-t acaa acac acat acca accc acco acct acoa acot acta actc acto actt actv acvv aoca aotc at-t ataa atac atat atca atcc atco atoc atot atta atto avao avat avcc avco avot avva avvo caaa caac caat cac- caca cacc caco cat- cata catc cato catt catv cava cavo ccaa ccac ccat ccca cccc cccv ccoc cctc cctt cctv ccvo coat coca coco coct coot cota cotc coto cott cova covo ctca ctot ctta ctvo ctvt cvac cvca cvcc ocac ocat occa occc occt oct- octa octo ooaa oooo otac oto- otoo otov otta otto ovo- ovoo ovot taa- taat taca tacc taco tact tacv taoa tata tato tatt tatv tava tavo tcca tccc tcov tctc toat toca toco tooa toot tota totc toto tott tova tovo tttt tvac tvtv vaat vaca vaco vata vato vatt vava vcat voat voca vooc voot vota voto vtac vvvv