-vac a-ak a-be a-do a-ok aaaa aaab aaac aaad aaae aaav aaba aabb aabc aabd aaca aacb aacc aacd aace aack aaco aacv aada aadc aade aaea aaec aaev aaka aake aaoe aaoo aava abaa abab abac abad abae abak abb- abba abbb abbe abbo abca abcb abcc abcd abda abdo abec abed abee aboa abob abod abok aboo abov abva abvd acaa acab acac acad acae acba acca accc accd acce acco acda acdb acdc acde ace- acea acec aced acek acev ackd acke acoa acod acoe acvv adaa adab adac adad adae adak adao adba adbc adcc adda addc addd adde addo adea adeb adee adeo adob adoc adod adoe adok adoo advb aeac aecb aede aeka aeva akaa akae akao akca aked akee akka akko akok aoba aoca aoce avab avao avcc avce avco avda avea avec aveo avva avvo baaa baad baak baba babb babe babo bac- baca bacc bace back baco bada badb badd bade bado baed baek bak- baka bake bako bava bave bbad bbbb bbdd bbdo bbeb bcaa bcbc bcca bccc bcda bcde bcec bcvo bdav bdbc bddc bead beak beav beba bebb bebe bebo beca beck beda bede bedo beeb beed beek beka beke beko beo- beod beok bevo boab boac boad boak boba bobb bobe bobo boca boce bock boco boda bodb bode bodo boea boec boee boeo boka boke boko boob booc bood booe book bova bove bovo c-bo c-cd caaa caab caac caba cabe cabo cac- caca cacc cace cack caco cada cadc cadd cade cado caec caka cake caod cava cave cavo cbac cbbc cbca cbcc cbce cbdb cbdc cbdo cbea cbec cbee cbka cbko cbva cbvb cbve ccaa ccab ccac ccad ccba ccbc ccca cccb cccc cccv ccdc cced ccee ccob ccoc ccod ccvo cd-e cdaa cdac cdad cdba cdda cddb cdec cdvd ceac cead ceba cec- ceca cece ceco ceda cedd cede cedo ceeb ceec ceke ceva cevo ckac ckbc ckbe ckck ckco ckcv ckdo ckoa ckob ckoc ckoo ckvo coad coak coba cobb cobe cobo coca coce cock coco coda codd code coed cok- coka coke coko coob cood cook cova cove covo cvac cvca cvcc d-bo daab daad daae daba dabb dabo daca dace dada dade dado daeb daka dake dako dava dave dbcc dcbc dcca dccb dccc dccv dcdb dcvd dddd ddoc deac dead deae deak deba debe dec- deca decc decd dece deck deco deda dedd dede dedo deeb deed deek deev dek- deka deke deva deve devo dkba dkdc doab doae doak doba dobb dobe doca doce dock doco dod- doda dodd dode dodo doea doek doka doke doko doob dood dook dove dvda dvoa eaba eaca eacc eada eadb eadd eaec eave ebac ebba ebbc ebbo ebcc ebed eboe eboo ecaa ecac ecad ecao ecbc ecbe ecca eccb eccc ecce ecco ecdc eced ecka ecko eco- ecod edac edad edca edda eddc edde eddo ede- edea edoc edod edve eeca eede eeea eeee eeka eeke eeoc eeva eka- ekab ekco ekeb eked ekek ekka ekoa eocd eode eoka evac evae evdb evea evoe evoo evvk kaaa kaab kaak kaba kabb kabc kabd kabe kabo kacb kacc kacd kace kaco kacv kad- kada kadd kade kado kadv kaeo kaka kakc kake kakk kako kaoa kaoc kaok kava kavb kave kavo kavv kbaa kbab kbac kbad kbae kbak kbba kbbb kbbc kbbd kbbe kbbk kbbo kbca kbcb kbce kbck kbco kbdb kbde kbdo kbdv kbeb kbec kbed kbee kbek kbeo kbev kbkb kbkk kbko kbkv kboa kbob kboc kbod kboe kbok kboo kbov kbva kbvb kbvc kbvo kcaa kcab kcac kcad kcav kcba kcbc kcbd kcbk kcca kccb kccc kccd kcck kccv kcda kcdc kcdd kcdv kcea kceb kcec kced kcee kceo kckc kckk kcko kckv kcob kcoe kcvd kcvk kcvo kcvv kdaa kdab kdac kdad kdae kdak kdao kdav kdbb kdbv kdca kdcc kdcd kdce kdco kddb kddc kddd kddk kdeb kdec kdka kdkb kdkd kdkk kdko kdoc kdoe kdok kdov kdva kdvb kdvv kea- kead keak keba kebb kebc kebe keca keck keco keda kedb kedc kedd kede kedo keed keek keka kekb kekc keke keko keok keva keve kkaa kkac kkba kkbb kkbd kkbe kkbo kkcb kkcd kkck kkco kkda kkdc kkdd kkdo kkdv kkea kked kkkk kkoa kkob kkoo kkov kkvv koab koac koae koak koba kobb kobc kobe kobk kobo koca kocb kocd kock koda kode kodk kodo kodv koea koed koka kokb kokc koke kokk koko koob kooc kook kooo koov kova kovc kove kovk kovo kvab kvak kvbc kvcb kvcc kvce kvck kvco kvcv kvda kvea kvec kvoa kvob kvoc kvod kvoe kvok kvoo kvov kvvv o-eo oade oake obad obak obba obbo obea obec obed obkb oboe obok ocab ocac ocad ocak ocbc occa occc oce oced ocee ocke odac odbo odda oddd odea oded odeo odoo odva oec- oeca oecc oedo oeec okak oked okka okko okok ooaa ooak ooba oobe ooda oooo ovda ovde ovee ovo- ovod ovoo vaad vaca vace vack vaco vada vade vado vaka vake vava vbcc vdcc vdec veak veba vecc veck veda vedc vede vedo veka veke veve vevo voad voca voce voda vode vodo voka voke vooc vovk vvob vvvv