bbbb bbcm bbrc bcbc bccc bccm bcor bcru bcuc bmoc bobb bobo bobu bock bocm boco bocu boko boku bomb bomu boob booc book boom boor bor- bork borm boro borr boru bouk boum bour brcb brkb brmc brob broc brok brom broo bror brou brrm brrr bruc brum bubb bubo bubu bucc buck buco bucu bukk buko buku bum- bumb bur- burb burk burm buro burr buru c-bo cbbc cbcc cbcm cbcr cbcu cbkm cbko cbkr cbrm ccbc cccb cccc cccm cccu cckm ccmb ccmc ccmm ccob ccoc ccom ccrc ccuc ckbc ckck ckcm ckco ckmo ckob ckoc ckom ckoo ckor ckrc ckrm cmbc cmcc cmmb cmmc cmoc cmrr cobb cobo cobu cock coco cocu cok- coko com- comb comc comm como comr comu coob cook coom cor- corb corc cork corm coro corr coub couk cour crbc crbu crcc crcr crkc crmb crmo crob croc crok crom croo cror crub cruk crum cub- cubb cucc cuck cucm cuk- cum- curb curo curr kbbb kbbc kbbk kbbm kbbo kbbr kbbu kbcb kbck kbco kbcr kbcu kbkb kbkk kbko kbkr kbmb kbmc kbmo kbmr kbob kboc kbok kboo kbrb kbrc kbrk kbro kbru kbub kbuc kbuk kbur kbuu kcbc kcbk kcbr kcbu kccb kccc kcck kccr kccu kckc kckk kckm kcko kckr kcmb kcmc kcmk kcmm kcmo kcmr kcob kcom kcor kcou kcrc kcro kcrr kcru kcub kcuk kkbb kkbo kkbr kkcb kkck kkcm kkco kkcr kkkk kkmc kkmk kkmo kkmr kkob kkoo kkor kkrb kkrc kkrk kkro kkrr kkuu kmbc kmbr kmcb kmcc kmcm kmco kmcr kmcu kmkk kmko kmmk kmmm kmmo kmmr kmob kmoc kmok kmom kmor kmou kmrb kmrc kmro kmrr kmuc kmur kobb kobc kobk kobo kobr kobu kocb kock kocm kokb kokc kokk koko kokr koku komb komc komo komr koob kooc kook kooo koor koou korb korc kork koro korr koru koub koum kour kouu krbb krbk krbm krbr krcb krcc krcm krco krcu krkc krkk krko krkr krku krmb krmc krmo krmr krob kroc krok krom kroo kror krrb krrc krrk krrm krro krrr kruc kruk krum krur kubb kubc kubo kubr kubu kucb kucc kuco kucr kukk kuku kumm kumo kumr kumu kuok kuoo kurb kurk kurm kuro kurr kuru kuub kuuk kuur kuuu mbou mcbc mccc mckk mcmc mcrc mmcc mmcm mmmc mmmm mmor mmrc mobb mobo mock moco moko momo momu moob mooc mook moor morb mork moro moru mouk mour mr-c mrbb mrbm mrcb mrcc mrkr mrmc mrrc mruk mubo muc- mucc muck mucu muko mumm mumo mumu murc murk muro murr muru obbo obkb obok obor obro ocbc occc ocom ocro ocrr ocum ocur okcu okko okmo okok okom okor okro okur ombo ombu omo- omoo omor omro omuo oocr ooku oooo orbb orbo orbu orco orko ormo oro- orok orom oror orro orub orum oucc our- ouro ouu- rbbb rbbr rbmk rcbc rcbo rccb rccc rob- robb robo robu rocc rock roco rokk roko rokr roku romb romk romm romo roob rook room roor rorc rork roro roru roub rouk roum rrkm rrmc rrrr rrum rubb rubu ruck rukk ruku rumb rumm rumo ruok rurc ruro ruru ubbo uboc ucbc ucmc ucom ucrc ukcc ukko ukok ukrc ukum ukur umb- umbo ummo umok umor uocc uomo uor- uro- urok urom uroo uruk urum urur uuoc uuuu