-hou bbbb bbch bbrc bcbc bccc bcnu bcor bcru bcuc bhcc bhor bhur bhuu bnoc bnor bnrr bobb bobo bobu boch bock boco bocu bohn boho bohr bohu bokn boko boku bonc bonk bonn bono bonu boob booc booh book boon boor bor- borh bork born boro borr boru bouh bouk boun bour brcb brkb brno brob broc broh brok bron broo bror brou brrr bruc bruh brun bubb bubo bubu bucc buch buck buco bucu buho buhr bukh bukk buko buku bunb bunk bunn buno bunu buon bur- burb burh burk burn buro burr buru c-bo cbbc cbcc cbcn cbcr cbcu cbkn cbko cbkr cbrh cbrn ccbc ccbn cccb cccc cccu cchr ccnb ccnc ccnr ccnu ccob ccoc ccrc ccuc chch chkb chnb chnc chno chnr choc choh chok chon choo chor chou chrb chrc chrn chro chrr chub chuk chun chur ckbc ckch ckck ckco cknb cknc ckob ckoc ckoo ckor ckrc cnbc cnco cnoh cnrc cnrr cobb cobh cobo cobu coch cock coco cocu cohn coho cok- coko con- conc conk conn cono coob cooh cook coon cor- corb corc cork corn coro corr coub couk coun cour crbc crbu crcc crcr crkc crob croc croh crok cron croo cror crub cruk crun cub- cubb cucc cuck cucn cuk- cuno cuon curb curn curo curr hboc hcbc hccb hccc hcch hhhh hkbu hkcc hobo hoch hock hocn hocr hohn hoho hoko hoku honk hono honu hook hoon hoor horc hork horn horo horr houk hour hrob hron hrrc hrun hubb hubo huch huck hucu huhn huhu hunc hunh hunk huon huor hurk hurn huro hurr huru huub kbbb kbbc kbbk kbbo kbbr kbbu kbcb kbch kbck kbco kbcr kbcu kbhb kbhc kbhh kbhn kbhr kbkb kbkk kbko kbkr kbnh kbnn kbno kbnr kbnu kbob kboc kbok kbon kboo kbrb kbrc kbrh kbrk kbrn kbro kbru kbub kbuc kbuk kbun kbur kbuu kcbc kcbk kcbr kcbu kccb kccc kcck kccr kccu kchh kchk kchn kcho kchr kchu kckc kckk kckn kcko kckr kcnb kcnh kcno kcnr kcob kcoh kcon kcor kcou kcrc kcrh kcrn kcro kcrr kcru kcub kcuh kcuk khbc khbr khcb khcc khch khck khhk khho khkk khkn khkr khnc khnk khnr khnu khob khoc khok khon khor khou khrk khro khrr khub khuk khun khur kkbb kkbn kkbo kkbr kkcb kkch kkck kkcn kkco kkcr kkhb kkhh kkhk kkhr kkkk kknb kknn kkno kknu kkob kkoh kkon kkoo kkor kkrb kkrc kkrh kkrk kkrn kkro kkrr kkuu knbb knbc knbn knbr knbu kncb knch knck kncn knco kncr kncu knhc knhk knkk knnb knnk knnr knob knoc knok knon knor knou knrb knrk knro knub knuk knur kobb kobc kobk kobn kobo kobr kobu kocb koch kock kocn kohh kohn koho kohr kohu kokb kokc kokh kokk kokn koko kokr koku konc konk kono koob kooc kook koon kooo koor koou korb korc kork korn koro korr koru koub kour kouu krbb krbk krbr krcb krcc krch krcn krco krcu krhc krkc krkh krkk krkn krko krkr krku krnb krnh krnk krnn krno krnu krob kroc kroh krok kroo kror krrb krrc krrk krrn krro krrr kruc kruh kruk krun krur kubb kubc kubo kubr kubu kucb kucc kuch kuco kucr kuhn kuhu kukh kukk kukn kuku kunc kunk kuno kunr kunu kuok kuon kuoo kurb kurk kuro kurr kuru kuub kuuk kuur kuuu nbbc nbbo nbcc nbco ncbc nccc nccn nccr nccu nchc ncnc ncoc ncor ncrc ncuk nhcc nhnn nhon nhrc nkok nkor nnnn nobc nobo nobu noch nock noco nohn noho noko non- nonn nono nonu noo- noob nook noon nooo noor nor- norb norc nork norn noro norr nouh noun nour nroc nron nrrc nubc nubk nuch nuck nucu nuku nunc nunk nunn nuno nuoc nuon nurc nurn nurr nuru nuuk obbo obkb obok obon obor obrh obro obuh ocbc occc occn ocon ocro ocrr ocur ohcc ohho ohno ohob ohoh ohok ohrn okcu okko okno okok okon okor okro okun okur onc- onco onno onon onor onur oocr ooho ooku oooh oooo orbb orbo orbu orch orco orko ornc orno oro- orok oron oror orro orub oucc ouch oun- our- ourn ouro ouu- rbbb rbbr rboh rcbc rcbo rccb rccc rchb rcnr rcon rhob rhoc rhoh rhon rhun rnbr rnco rob- robb robo robu rocc roch rock roco rohn rohr rohu rokh rokk roko rokr roku ronc ronk rono roob rook roon roor rorc rork roro roru roub rouh rouk roun rrrr rrun rubb rubu ruch ruck ruhh ruhn ruhr rukh rukk rukn ruku runc runk runn runo ruok rurc ruro ruru ruun ubbo uboc ubon ucbc ucho ucon ucrc uhno uhoh uhok uhuh ukcc ukko uknc ukok ukon ukrc ukur uncc unch unco unkn unko unno unon unro uocc uor- urch urho uro- urok uroo urrh uruk urun urur uuno uuoc uuuu