bbbb bbci bcbc bccc bcci bibb bibi bibo bicc bici bick bico biko bio- bioc bioi bobb bobi bobo bock boco boi- boii boki boko boob booc book c-bo cbbc cbcc cbko ccbc cccb cccc ccci ccic ccii ccob ccoc cibc cibi cibo cicc cici cico ciii ciko ciob ckbc ckbi ckck ckco ckob ckoc ckoi ckoo cobb cobi cobo cock coco cok- coko coob cook icbc iccb iccc icci icco icoc iiii iiio iioi iioo ikki ikko ikoo iobi ioci ioii ioio ioko iooi iooo k-ci kbbb kbbc kbbi kbbk kbbo kbcb kbci kbck kbco kbib kbic kbik kbio kbkb kbkk kbko kbob kboc kboi kbok kboo kcbc kcbi kcbk kccb kccc kcci kcck kcic kcii kckc kckk kcko kcob kibb kibc kibi kibo kicb kicc kick kiic kiii kiik kikc kiki kikk kiko kioc kioi kiok kioo kkbb kkbi kkbo kkcb kkci kkck kkco kkic kkik kkkk kkob kkoo kobb kobc kobi kobk kobo kocb koci kock koii kokb kokc koki kokk koko koob kooc kooi kook kooo obbo obkb oboi obok ocbc occc occi oici oick oiii oiko okic okko okok oobi oooo