bbbb bbci bcbc bccc bcci bcuc bcvo bibb bibi bibo bicc bici bick bico biko biku bio- bioc bioi biou bivi bobb bobi bobo bobu bock boco bocu boi- boii boiu boki boko boku boob booc book bouk bovi bovo bubb bubi bubo bubu bucc buci buck buco bucu buic buik buiu buki bukk buko buku c-bo cbbc cbcc cbcu cbko cbvb ccbc cccb cccc ccci cccu cccv ccic ccii cciv ccob ccoc ccuc ccvi ccvo cibc cibi cibo cicc cici cico cicu ciii ciko ciob ciuc civc civo ckbc ckbi ckck ckco ckcv ckob ckoc ckoi ckoo ckvo cobb cobi cobo cobu cock coco cocu cok- coko coob cook coub couk covo cub- cubb cubi cucc cuci cuck cui- cuk- cvcc cvii icbc iccb iccc icci icco iccu icoc icub iiii iiio iioi iioo iiuc ikki ikko ikoo ikuo iobi ioci ioii ioio ioko iooi iooo iucc iucv iuiu ivbv ivic k-ci kbbb kbbc kbbi kbbk kbbo kbbu kbcb kbci kbck kbco kbcu kbib kbic kbik kbio kbiu kbkb kbkk kbko kbkv kbob kboc kboi kbok kboo kbov kbub kbuc kbuk kbuu kbvb kbvc kbvo kbvu kcbc kcbi kcbk kcbu kccb kccc kcci kcck kccu kccv kcic kcii kciu kciv kckc kckk kcko kckv kcob kcou kcub kcui kcuk kcvi kcvk kcvo kcvu kcvv kibb kibc kibi kibo kibu kicb kicc kick kiic kiii kiik kiiu kikc kiki kikk kiko kiku kioc kioi kiok kioo kiou kiuu kivi kivu kkbb kkbi kkbo kkcb kkci kkck kkco kkic kkik kkkk kkob kkoo kkov kkuu kkvu kkvv kobb kobc kobi kobk kobo kobu kocb koci kock koii koiv kokb kokc koki kokk koko koku koob kooc kooi kook kooo koou koov koub koui kouu kovc kovi kovk kovo kubb kubc kubo kubu kucb kucc kuci kuco kucv kuic kuik kuki kukk kuku kuok kuoo kuub kuuk kuuu kuvi kuvo kvbc kvcb kvcc kvci kvck kvco kvcu kvcv kvic kvik kviv kvob kvoc kvoi kvok kvoo kvou kvov kvui kvuu kvvv obbo obkb oboi obok obvi ocbc occc occi oici oick oiii oiko okcu okic okko okok oobi ooku oooo oucc ouii ouu- ovi- ovo- ovoo ubbi ubbo ubic ubii ubik uboc ucbc ucci ucio ukcc ukko ukok uocc uovo uuoc uuuu uv-b uv-c uvic uvok uvvu vbcc vcbi vcci vic- vici vick vico viii viik viki viko vivi vivo voic voio vooc vouk vovk vuco vuku vvob vvvv