-vac a-ak a-ok aaaa aaab aaac aaav aaba aabb aabc aaca aacb aacc aack aaco aacu aacv aaka aaku aaoo aava abaa abab abac abak abau abb- abba abbb abbo abca abcb abcc aboa abob abok aboo abou abov abua abuk abva acaa acab acac acba acca accc acco accu acoa acou acu- acuo acvv akaa akao akca akka akko akku akok akua aoba aoca auaa auca avab avao avcc avco avou avva avvo baaa baak baba babb babo babu bac- baca bacc back baco bak- baka bako baku bau- bauk bava bavu bbau bbbb bcaa bcbc bcca bccc bcuc bcvo boab boac boak boba bobb bobo bobu boca bock boco bocu boka boko boku boob booc book boua bouk bova bovo buba bubb bubo bubu buca bucc buck buco bucu buka bukk buko buku c-bo caaa caab caac caba cabo cabu cac- caca cacc cack caco caka cauc cauk cauo cava cavo cavu cbac cbbc cbca cbcc cbcu cbka cbko cbva cbvb ccaa ccab ccac ccba ccbc ccca cccb cccc cccu cccv ccob ccoc ccuc ccvo ckac ckbc ckck ckco ckcv ckoa ckob ckoc ckoo ckvo coak coba cobb cobo cobu coca cock coco cocu cok- coka coko coob cook coua coub couk cova covo cuau cub- cuba cubb cuca cucc cuck cuk- cuka cvac cvca cvcc kaaa kaab kaak kaba kabb kabc kabo kabu kacb kacc kaco kacu kacv kaka kakc kakk kako kaku kaoa kaoc kaok kau- kaub kauc kauk kauo kava kavb kavo kavu kavv kbaa kbab kbac kbak kbba kbbb kbbc kbbk kbbo kbbu kbca kbcb kbck kbco kbcu kbkb kbkk kbko kbkv kboa kbob kboc kbok kboo kbov kbua kbub kbuc kbuk kbuu kbva kbvb kbvc kbvo kbvu kcaa kcab kcac kcau kcav kcba kcbc kcbk kcbu kcca kccb kccc kcck kccu kccv kckc kckk kcko kckv kcob kcou kcua kcub kcuk kcvk kcvo kcvu kcvv kkaa kkac kkba kkbb kkbo kkcb kkck kkco kkkk kkoa kkob kkoo kkov kkua kkuu kkvu kkvv koab koac koak koba kobb kobc kobk kobo kobu koca kocb kock koka kokb kokc kokk koko koku koob kooc kook kooo koou koov koua koub kouu kova kovc kovk kovo kuac kuau kuba kubb kubc kubo kubu kuca kucb kucc kuco kucv kuka kukk kuku kuoa kuok kuoo kuub kuuk kuuu kuva kuvo kvab kvak kvbc kvcb kvcc kvck kvco kvcu kvcv kvoa kvob kvoc kvok kvoo kvou kvov kvuu kvvv oaau obak obba obbo obkb obok ocab ocac ocak ocbc occa occc okak okcu okka okko okok ooaa ooak ooba ooku oooo ouac oucc ouu- ovo- ovoo uabc uaca uaoc uaua ubac ubba ubbo uboc ucak ucav ucbc ucca ucka ucua ukba ukcc ukko ukok uocc uovo uuoc uuuu uv-a uv-b uv-c uvaa uvac uvok uvvu vaca vack vaco vaka vava vbcc voca voka vooc vouk vovk vuca vuco vuka vuku vvob vvvv