-hou bbbb bbch bcbc bccc bctc bcuc bhcc bhot bhut bhuu bobb bobo bobu boch bock boco bocu boho boht bohu boko boku boob booc booh book boot botb both boto bott bouh bouk bout btcc btob bttb bubb bubo bubu bucc buch buck buco bucu buho bukh bukk buko buku but- buto butt c-bo cbbc cbcc cbct cbcu cbko cbot cbtc ccbc cccb cccc cccu ccob ccoc cctb cctc cctt ccuc ccut chch chkb chkt choc choh chok choo chou chto chtt chub chuk chut ckbc ckch ckck ckco ckob ckoc ckoo ckot cktb cobb cobh cobo cobu coch cock coco coct cocu coho cok- coko coob cooh cook coot cotb cotc coth coto cott cotu coub couk cout ctot cub- cubb cucc cuck cuk- cut- cutc cuth cuto cutt hboc hbtu hcbc hccb hccc hcch hhhh hkbu hkcc hobo hoch hock hoho hoko hoku hook hoot hotb hoth hoto hott hotu houk hout htcc htoh hubb hubo huch huck hucu huhu huot huth huto hutt hutu huub kbbb kbbc kbbk kbbo kbbt kbbu kbcb kbch kbck kbco kbct kbcu kbhb kbhc kbhh kbht kbkb kbkk kbko kbob kboc kbok kboo kbot kbtb kbtc kbtk kbto kbtt kbub kbuc kbuk kbut kbuu kcbc kcbk kcbu kccb kccc kcck kcct kccu kchh kchk kcho kchu kckc kckk kcko kcob kcoh kcot kcou kctb kctc kcto kctu kcub kcuh kcuk khbc khbt khcb khcc khch khck khct khhk khho khkk khob khoc khok khot khou khtb khth khtk khto khtt khub khuk khut kkbb kkbo kkbt kkcb kkch kkck kkco kkct kkhb kkhh kkhk kkkk kkob kkoh kkoo kkot kktc kktk kktu kkut kkuu kobb kobc kobk kobo kobu kocb koch kock koct kohh koho koht kohu kokb kokc kokh kokk koko koku koob kooc kook kooo koot koou kotb kotc koth kotk koto kott kotu koub kout kouu ktbb ktbc ktbt ktbu ktcc ktch ktck ktco kthc kthh kthk ktho ktht kthu ktkb ktkc ktkk ktko ktkt ktku ktob ktoc ktoh ktok ktoo ktot kttc ktth kttk ktto kttt kttu ktub ktuc ktuh kubb kubc kubo kubu kucb kucc kuch kuco kuht kuhu kukh kukk kuku kuok kuoo kuth kuto kutt kutu kuub kuuk kuuu obbo obkb obok obot obuh ocbc occc occt ocht oct- octo ohcc ohho ohob ohoh ohok ohto ohtu okcu okko okok okot okto ooho ooku oooh oooo ootb otho oto- otoh otok otoo otto ottu oucc ouch out- outb outh outo ouu- tbcb tbcc tccc tccu tch- tchh tcho tchu tctc thch thoo thot thou thtb thuk tobo tobt tobu toch tock toco toho tohu toko toku tooh took toot totc toth toto tott touh touk tout ttbb tttt tubb tubo tubu tucc tuch tuck tuco tuht tuhu tuko tuto tutt tutu tuuo ubbo uboc ucbc ucho ucut uhoh uhok uhuh ukcc ukko ukok uocc utto uttu uuoc uuuu