-vac a-ak a-ok aaaa aaab aaac aaar aaav aaba aabb aabc aaca aacb aacc aack aaco aacr aacu aacv aaka aaku aaoo aara aarc aaro aaru aava abaa abab abac abak abar abau abb- abba abbb abbo abbr abca abcb abcc abcr aboa abob abok aboo abor abou abov abra abrc abro abua abuk abva acaa acab acac acar acba acca accc acco accu acoa acor acou acr- acra acrc acro acrr acrv acu- acuo acur acvv akaa akao akar akca akka akko akku akok akr- akra akua aoba aoca aora aorb arab arac arak arar arau arba arc- arca arco arka arko aroa arob aroo aror arr- arra arrc arrk arro arrr arru arua arub arva arvo auaa auca aur- aura auro avab avao avar avcc avco avor avou avra avro avur avva avvo baaa baak baar baba babb babo babr babu bac- baca bacc back baco bak- baka bako bakr baku bar- bara barb barc bark baro barr baru bau- bauk baur bava bavu bbau bbbb bbrc bcaa bcar bcbc bcca bccc bcor bcra bcru bcuc bcvo boab boac boak boar boba bobb bobo bobu boca bock boco bocu boka boko boku boob booc book boor bor- bora bork boro borr boru boua bouk bour bova bovo brab brac brak brao brau brav brca brcb brka brkb broa brob broc brok broo bror brou brrr bruc bruv buar buba bubb bubo bubu buca bucc buck buco bucu buka bukk buko buku bur- bura burb burk buro burr buru c-bo caaa caab caac caba cabo cabu cac- caca cacc cack caco cacr caka caor cara carb carc cark caro carr cauc cauk cauo cava cavo cavu cbac cbar cbbc cbca cbcc cbcr cbcu cbka cbko cbkr cbva cbvb cbvr ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccu cccv ccob ccoc ccra ccrc ccuc ccvo ckac ckbc ckck ckco ckcv ckoa ckob ckoc ckoo ckor ckrc ckvo coak coba cobb cobo cobu coca cock coco cocu cok- coka coko coob cook cor- cora corb corc cork coro corr coua coub couk cour cova covo crab crac crar crau crbc crbu crca crcc crcr crkc crob croc crok croo cror crub cruk cuau cub- cuba cubb cuca cucc cuck cuk- cuka cura curb curo curr cvac cvar cvca cvcc cvra cvrr kaaa kaab kaak kaar kaba kabb kabc kabo kabr kabu kacb kacc kaco kacu kacv kaka kakc kakk kako kaku kaoa kaoc kaok kaor kara karb kark karo karr karu karv kau- kaub kauc kauk kauo kaur kava kavb kavo kavu kavv kbaa kbab kbac kbak kbar kbba kbbb kbbc kbbk kbbo kbbr kbbu kbca kbcb kbck kbco kbcr kbcu kbkb kbkk kbko kbkr kbkv kboa kbob kboc kbok kboo kbov kbra kbrb kbrc kbrk kbro kbru kbrv kbua kbub kbuc kbuk kbur kbuu kbva kbvb kbvc kbvo kbvr kbvu kcaa kcab kcac kcar kcau kcav kcba kcbc kcbk kcbr kcbu kcca kccb kccc kcck kccr kccu kccv kckc kckk kcko kckr kckv kcob kcor kcou kcrc kcro kcrr kcru kcrv kcua kcub kcuk kcvk kcvo kcvr kcvu kcvv kkaa kkac kkar kkba kkbb kkbo kkbr kkcb kkck kkco kkcr kkkk kkoa kkob kkoo kkor kkov kkrb kkrc kkrk kkro kkrr kkrv kkua kkuu kkvr kkvu kkvv koab koac koak koar koba kobb kobc kobk kobo kobr kobu koca kocb kock koka kokb kokc kokk koko kokr koku koob kooc kook kooo koor koou koov kora korb korc kork koro korr koru korv koua koub kour kouu kova kovc kovk kovo kovr krab krac krak krar krav krba krbb krbk krbr krca krcb krcc krco krcu krka krkc krkk krko krkr krku krkv kroa krob kroc krok kroo kror krov krrb krrc krrk krro krrr krua kruc kruk krur krva krvb krvc krvk krvo krvr krvv kuac kuar kuau kuba kubb kubc kubo kubr kubu kuca kucb kucc kuco kucr kucv kuka kukk kuku kuoa kuok kuoo kura kurb kurk kuro kurr kuru kurv kuub kuuk kuur kuuu kuva kuvo kuvr kvab kvak kvar kvbc kvbr kvcb kvcc kvck kvco kvcr kvcu kvcv kvoa kvob kvoc kvok kvoo kvor kvou kvov kvra kvrc kvro kvrr kvrv kvuu kvvr kvvv oaau oara obak obba obbo obkb obok obor obra obro ocab ocac ocak ocbc occa occc ocra ocro ocrr ocur okak okcu okka okko okok okor okra okro okur ooaa ooak ooba oocr ooku oooo oora orab orac orak orao orar orav orba orbb orbo orbu orca orco orka orko oro- orok oror orra orro orub orvr ouac oucc our- oura ouro ouu- ovar ovo- ovoo ovra raab raak raba rabb rabk rabo rabu rac- raca racc rack raco racu racv raka rakk raku raob raoc raok rara rarb rark raro raua raub rauc rauk rava rbbb rbbr rcac rcbc rcbo rccb rccc rcuv rcvr roab roak roar rob- roba robb robo robu roca rocc rock roco roka rokk roko rokr roku roob rook roor rora rorc rork roro roru roua roub rouk rova rovo rrrr ruba rubb rubu ruca ruck ruka rukk ruku ruok rura rurc ruro ruru ruvu rv-c rvca uabc uaca uaoc uarc uaru uaua ubac ubar ubba ubbo uboc ubra ucak ucar ucav ucbc ucca ucka ucrc ucua ukba ukcc ukko ukok ukra ukrc ukur uocc uor- uovo urac urao urau urba urca urka uro- uroa urok uroo urra uruk urur urva uuoc uuuu uv-a uv-b uv-c uvaa uvac uvok uvvu vaar vaca vack vaco vaka vara vark varr varu vava vbcc vkor voar voca voka vooc voor vor- vora voro voru vouk vour vovk vrac vrak vrav vrba vroc vruk vuca vuco vuka vuku vurb vvob vvvv