bbbb bbcm bbrc bcbc bccc bccm bcor bmoc bobb bobo bock bocm boco boko bomb boob booc book boom boor bor- bork borm boro borr brcb brkb brmc brob broc brok brom broo bror brrm brrr c-bo cbbc cbcc cbcm cbcr cbkm cbko cbkr cbrm ccbc cccb cccc cccm cckm ccmb ccmc ccmm ccob ccoc ccom ccrc ckbc ckck ckcm ckco ckmo ckob ckoc ckom ckoo ckor ckrc ckrm cmbc cmcc cmmb cmmc cmoc cmrr cobb cobo cock coco cok- coko com- comb comc comm como comr coob cook coom cor- corb corc cork corm coro corr crbc crcc crcr crkc crmb crmo crob croc crok crom croo cror kbbb kbbc kbbk kbbm kbbo kbbr kbcb kbck kbco kbcr kbkb kbkk kbko kbkr kbmb kbmc kbmo kbmr kbob kboc kbok kboo kbrb kbrc kbrk kbro kcbc kcbk kcbr kccb kccc kcck kccr kckc kckk kckm kcko kckr kcmb kcmc kcmk kcmm kcmo kcmr kcob kcom kcor kcrc kcro kcrr kkbb kkbo kkbr kkcb kkck kkcm kkco kkcr kkkk kkmc kkmk kkmo kkmr kkob kkoo kkor kkrb kkrc kkrk kkro kkrr kmbc kmbr kmcb kmcc kmcm kmco kmcr kmkk kmko kmmk kmmm kmmo kmmr kmob kmoc kmok kmom kmor kmrb kmrc kmro kmrr kobb kobc kobk kobo kobr kocb kock kocm kokb kokc kokk koko kokr komb komc komo komr koob kooc kook kooo koor korb korc kork koro korr krbb krbk krbm krbr krcb krcc krcm krco krkc krkk krko krkr krmb krmc krmo krmr krob kroc krok krom kroo kror krrb krrc krrk krrm krro krrr mcbc mccc mckk mcmc mcrc mmcc mmcm mmmc mmmm mmor mmrc mobb mobo mock moco moko momo moob mooc mook moor morb mork moro mr-c mrbb mrbm mrcb mrcc mrkr mrmc mrrc obbo obkb obok obor obro ocbc occc ocom ocro ocrr okko okmo okok okom okor okro ombo omo- omoo omor omro oocr oooo orbb orbo orco orko ormo oro- orok orom oror orro rbbb rbbr rbmk rcbc rcbo rccb rccc rob- robb robo rocc rock roco rokk roko rokr romb romk romm romo roob rook room roor rorc rork roro rrkm rrmc rrrr