-vac aaaa aaab aaac aaal aaav aaba aabb aabc aabl aaca aacb aacc aacl aacu aacv aala aalc aall aalu aava abaa abab abac abal abau abb- abba abbb abca abcb abcc abcl abla ablv abua abul abva acaa acab acac acba acbl acca accc accu acla aclc aclu acu- acul acvv alaa alac alal alau alb- alba albc albu alca alcc all- alla alll allu alua alva auaa auca aul- aula aull aulu avab aval avcc avlb avva baaa baal baba babb babu bac- baca bacc bala balc ball balu bau- baul bava bavu bbau bbbb bblb bcaa bcbc bcca bccc bccl bcuc blaa blab blac blau blcu blub bual buba bubb bubu buca bucc bucu bula bulb bull bulu caaa caab caac caal caba cabu cac- caca cacc cala calc call calu cauc caul cava cavu cbac cbal cbbc cbca cbcc cbcl cbcu cblb cblc cbva cbvb ccaa ccab ccac ccba ccbc ccca cccb cccc cccl cccu cccv ccla cclc cclv ccuc clab clau clav club cuau cub- cuba cubb cuca cucc cula culb culc cull cvac cvca cvcc laaa laac laal laba labu laca lacc lacl lacu lala lall lalu laub laul lava lavc lbcc lcac lcbc lcca lccc llcc lllc llll luau luba luca lula lull lulu luua lvcc uabc uaca uaua ubac ubal ubba ubla ucal ucav ucbc ucca ucla ucua ulaa ulbc ulcc ulla ulua ulul ulva uulu uuuu uv-a uv-b uv-c uvaa uvac uval uvvu vaal vaca vala vall valu vava vbcc vcal vlab vlba vlcc vual vuca vula vull vvvv