-vac a-do aaaa aaac aaad aaav aaca aacc aacd aaco aact aacv aada aadc aadt aaoo aata aatc aatt aava ac-t acaa acac acad acat acca accc accd acco acct acda acdc acdt acoa acod acot acta actc acto actt actv acvv adaa adac adad adao adat adcc adda addc addd addo adoc adod adoo adot adta advt aoca aotc aotd at-t ataa atac atad atat atca atcc atco atdt atoc atod atot atta atto avao avat avcc avco avda avot avva avvo c-cd caaa caac caat cac- caca cacc caco cada cadc cadd cado caod cat- cata catc catd cato catt catv cava cavo ccaa ccac ccad ccat ccca cccc cccv ccdc ccoc ccod cctc cctt cctv ccvo cdaa cdac cdad cdda cdot cdtv cdvd coad coat coca coco coct coda codd cood coot cota cotc coto cott cova covo ctca ctot ctta ctvo ctvt cvac cvca cvcc d-tv daad daca dact dada dado data dato datt dava dcca dccc dcct dccv dctc dctv dcvd dddd ddoc ddot ddtv doat doca doco doct dod- doda dodd dodo dood doot dota dotd doto dott dtaa dtac dtcc dtot dvda dvoa ocac ocad ocat occa occc occt oct- octa octo odac odda oddd odoo odot odva ooaa ooda oooo otac otcd oto- otoo otov otta otto ovda ovo- ovod ovoo ovot taa- taat taca tacc taco tact tacv tada tado taoa tata tato tatt tatv tava tavo tcad tcca tccc tcdd tcov tctc tdac tdtv toad toat toca toco toda todd todo todt tooa tood toot tota totc totd toto tott tova tovo tttt tvac tvad tvtv vaad vaat vaca vaco vada vado vata vato vatt vava vcat vdcc vdot voad voat voca voda vodo vooc voot vota votd voto vtac vvvv