bbbb bbdd bbdo bbeb bcbc bccc bcde bcec bcuc bcvo bdbc bddc bebb bebe bebo beck becu bede bedo bedu beeb beed beek beke beko beo- beod beok beuk bevo bobb bobe bobo bobu boce bock boco bocu bodb bode bodo bodu boec boee boeo boke boko boku boob booc bood booe book boud boue bouk bove bovo bubb bube bubo bubu bucc buce buck buco bucu budb budd bude budo budu bueu buke bukk buko buku buvd buve bvdu c-bo c-cd cbbc cbcc cbce cbcu cbdb cbdc cbdo cbec cbee cbko cbvb cbve ccbc cccb cccc cccu cccv ccdc cced ccee ccob ccoc ccod ccuc ccvo cd-e cddb cdec cdvd cebu cec- cece ceco cedd cede cedo cedu ceeb ceec ceke ceou cevo ckbc ckbe ckck ckco ckcv ckdo ckdu ckob ckoc ckoo ckvo cobb cobe cobo cobu coce cock coco cocu codd code coed cok- coke coko coob cood cook coub coud coue couk cove covo cub- cubb cube cucc cuce cuck cude cued cuek cuk- cuke cuve cvcc d-bo dbcc dcbc dccb dccc dccu dccv dcdb dcvd dddd ddoc ddub debe debu dec- decc decd dece deck deco dedd dede dedo dedu deeb deed deek deev dek- deke deue deuk deve devo dkdc dobb dobe dobu doce dock doco docu dod- dodd dode dodo doek doke doko doob dood dook doub douc doud doue douk dove dub- dubb dubc dube dubu duce duck duco dudd dude dudo dudu duke duku duo- duve ebbc ebbo ebcc ebed eboe eboo ecbc ecbe eccb eccc ecce ecco ecdc eced ecko eco- ecod ecou eddc edde eddo ede- edoc edod edou educ edve eede eedu eeee eeke eeoc ekco ekeb eked ekek eocd eode eubc eucd eude evdb evoe evoo evvk kbbb kbbc kbbd kbbe kbbk kbbo kbbu kbcb kbce kbck kbco kbcu kbdb kbde kbdo kbdv kbeb kbec kbed kbee kbek kbeo kbev kbkb kbkk kbko kbkv kbob kboc kbod kboe kbok kboo kbov kbub kbuc kbud kbue kbuk kbuu kbvb kbvc kbvo kbvu kcbc kcbd kcbk kcbu kccb kccc kccd kcck kccu kccv kcdc kcdd kcdu kcdv kceb kcec kced kcee kceo kceu kckc kckk kcko kckv kcob kcoe kcou kcub kcue kcuk kcvd kcvk kcvo kcvu kcvv kdbb kdbv kdcc kdcd kdce kdco kddb kddc kddd kddk kdeb kdec kdkb kdkd kdkk kdko kdoc kdoe kdok kdov kdub kduc kduv kdvb kdvv kebb kebc kebe kebu keck keco kedb kedc kedd kede kedo keed keek kekb kekc keke keko keku keok keve kkbb kkbd kkbe kkbo kkcb kkcd kkck kkco kkdc kkdd kkdo kkdv kked kkkk kkob kkoo kkov kkuu kkvu kkvv kobb kobc kobe kobk kobo kobu kocb kocd kock kode kodk kodo kodu kodv koed kokb kokc koke kokk koko koku koob kooc kook kooo koou koov koub koue kouu kovc kove kovk kovo kubb kubc kubd kube kubo kubu kucb kucc kucd kuce kuco kucv kudd kude kudo kudu kued kuek kueu kuke kukk kuku kuok kuoo kuub kuuk kuuu kuvo kvbc kvcb kvcc kvce kvck kvco kvcu kvcv kvdu kvec kvob kvoc kvod kvoe kvok kvoo kvou kvov kvue kvuu kvvv o-eo obbo obec obed obkb oboe obok ocbc occc oce oced ocee ocke odbo oddd oded odeo odoo odou oec- oecc oedo oeec okcu oked okko okok oobe ooku oooo oucc oudc oude oued ouu- ovde ovee ovo- ovod ovoo ubbe ubbo ubek uboc ubod ubud ucbc ucdc ucdd udbc udev udoo uduk ukcc ukek ukeu ukko ukok uocc uoke uovo uuoc uuuu uv-b uv-c uvok uvvu vbcc vdcc vdec vdub vecc veck vedc vede vedo veke veve vevo voce vode vodo voeu voke vooc voud voue vouk vovk vuco vudu vuku vvob vvvv