-vac a-ak a-ok aaaa aaab aaac aaav aaba aabb aabc aabt aaca aacb aacc aack aaco aact aacv aaka aaoo aata aatc aatk aatt aava abaa abab abac abak abat abb- abba abbb abbo abbt abca abcb abcc abct aboa abob abok aboo abot abov abta abva ac-t acaa acab acac acat acba acca accc acco acct acoa acot acta actc acto actt actv acvv akaa akao akca akka akko akok akot aktv aoba aoca aotc at-t ataa atab atac atak atat atca atcc atck atco atka atkt atkv atob atoc atok atot atta atto avab avao avat avcc avco avkt avot avva avvo baaa baak baat baba babb babo bac- baca bacc back baco bact bak- baka bako bakt bata batc bato batt bava bbbb bcaa bcat bcbc bcca bccc bctc bcvo boab boac boak boat boba bobb bobo boca bock boco boka boko boob booc book boot bota botb boto bott bova bovo btaa btcc btob bttb c-bo caaa caab caac caat caba cabo cac- caca cacc cack caco caka cat- cata catb catc cato catt catv cava cavo cbac cbat cbbc cbca cbcc cbct cbka cbko cbot cbta cbtc cbtv cbva cbvb ccaa ccab ccac ccat ccba ccbc ccca cccb cccc cccv ccob ccoc cctb cctc cctt cctv ccvo ckac ckat ckbc ckck ckco ckcv ckoa ckob ckoc ckoo ckot cktb ckvo coak coat coba cobb cobo coca cock coco coct cok- coka coko coob cook coot cota cotb cotc coto cott cova covo ctab ctba ctca ctot ctta ctvo ctvt cvac cvca cvcc kaaa kaab kaak kaat kaba kabb kabc kabo kacb kacc kaco kact kacv kaka kakc kakk kako kakt kaoa kaoc kaok kat- kata katb katc katk kato katt katv kava kavb kavo kavv kbaa kbab kbac kbak kbat kbba kbbb kbbc kbbk kbbo kbbt kbca kbcb kbck kbco kbct kbkb kbkk kbko kbkv kboa kbob kboc kbok kboo kbot kbov kbta kbtb kbtc kbtk kbto kbtt kbtv kbva kbvb kbvc kbvo kcaa kcab kcac kcat kcav kcba kcbc kcbk kcca kccb kccc kcck kcct kccv kckc kckk kcko kckv kcob kcot kcta kctb kctc kcto kctv kcvk kcvo kcvv kkaa kkac kkat kkba kkbb kkbo kkbt kkcb kkck kkco kkct kkkk kkoa kkob kkoo kkot kkov kktc kktk kktv kkvt kkvv koab koac koak koba kobb kobc kobk kobo koca kocb kock koct koka kokb kokc kokk koko koob kooc kook kooo koot koov kota kotb kotc kotk koto kott kotv kova kovc kovk kovo ktaa ktak ktao ktat ktav ktba ktbb ktbc ktbt ktcc ktck ktco ktcv ktkb ktkc ktkk ktko ktkt ktob ktoc ktok ktoo ktot kttc kttk ktto kttt kttv ktva ktvb ktvc ktvk ktvo ktvt kvab kvak kvat kvbc kvbt kvcb kvcc kvck kvco kvct kvcv kvoa kvob kvoc kvok kvoo kvot kvov kvta kvtk kvto kvtt kvtv kvvv obak obba obbo obkb obok obot ocab ocac ocak ocat ocbc occa occc occt oct- octa octo okak okka okko okok okot okta okto ooaa ooak ooba oooo ootb otac otak oto- otok otoo otov otta otto ovo- ovoo ovot taa- taat taba tabb tabc tabo taca tacc tack taco tact tacv taka takk tako takt taoa tata tatb tato tatt tatv tava tavo tbca tbcb tbcc tbta tcca tccc tcov tctc tkac toab toat toba tobo tobt toca tock toco toka toko tooa took toot tota totc toto tott tova tovo ttab ttbb tttt tvac tvtv vaat vaca vack vaco vaka vata vato vatt vava vbcc vcat voat voca voka vooc voot vota voto vovk vtac vvob vvvv