-hou bbbb bbch bbdd bbdo bbfc bbrc bcbc bccc bcfc bchd bcof bcor bcru bcuc bd-r bdbc bddc bddh bduf bhcc bhff bhor bhur bhuu bobb bobo bobu boch boco bocu bodb bodh bodo bodu bofd boff bofh bofu bohd boho bohr bohu boob booc bood boof booh boor bor- bord borf borh boro borr boru boud bouf bouh bour brcb brdo brfc brfu brob broc brod broh broo bror brou brrr bruc brud bruh bubb bubo bubu bucc buch buco bucu budb budd budo budu bufc buff bufo bufr buho buhr bur- burb burd burh buro burr buru c-bo c-cd cbbc cbcc cbcr cbcu cbdb cbdc cbdo cbfb cbfc cbrd cbrh ccbc cccb cccc cccf cccu ccdc ccdf ccdh ccdr ccfc ccfd ccff cchr ccob ccoc ccod ccrc ccrf ccuc cd-r cdbf cddb cddr cfbc cfbr cfcb cfcf cfco cffb cffr cfor cfrb chch chfc chfr choc chod choh choo chor chou chrb chrc chrd chrf chro chrr chub chud chur cobb cobh cobo cobu coch coco cocu codd cofc coff coho coob cood coof cooh cor- corb corc cord corf coro corr coub coud cour crbc crbu crcc crcr crdc crfc crob croc crod croh croo cror crub crud cub- cubb cucc cufc cuff cufo curb curd curf curo curr d-bo dbcc dbfc dbfo dcbc dccb dccc dccu dcdb dcfc dddd ddoc ddrc ddub dfcc dfco dfcu dfrf dhfc dhod dhor dhur dobb dobu doch doco docu dod- dodd dodo doff dohc dohr doob dood doof door dorc dord dorf doro dorr doru doub douc doud douf dour drbc drfc drob drod drof droh drou drub druu dub- dubb dubc dubh dubu duch duco dudd dudo dudu dufc duff dufu duhr duhu duo- duro duru duur fccf fcch fdoc ffcc ffff ffrr foch foco fofo fohr food foof for- forb ford foro forr foud four frbc frcc frfc frob froh frou frub fubb fubu fuc- fudd fufc fuff fufu fuor fur- furo furr hbcd hbfc hboc hcbc hccb hccc hcch hcdr hcfc hcrd hdfc hdoc hdod hhhh hhof hobo hoch hocr hodh hodr hoff hofu hoho hood hoof hoor horc hord horo horr houd houf hour hrdc hrfc hrob hrod hrrc hrud hubb hubo huch hucu hudd hudo hudu hufc huff hufu huhu huor hurd huro hurr huru huub obbo obor obrh obro obuh ocbc occc ocro ocrr ocur odbo oddd odoh odoo odor odou odur ofcr ofdr off- offc offh offo offr offu ofor ohcc ohho ohob ohoh oocr ooff ooho oooh oooo oord orbb orbo orbu orch orco ordo ordu orff orfu oro- orof oror orro orub oucc ouch oudc oudh oufc ouff our- ouro ouu- rbbb rbbr rboh rcbc rcbo rccb rccc rcdc rcfc rchb rcrd rdoc rffc rhob rhoc rhod rhoh rob- robb robo robu rocc roch roco rodd rodo rofc roff rofo rohr rohu roob rood roof roor rorc roro roru roub roud rouf rouh rrfc rrrr rubb rubu ruch rudd rudo rufc ruff rufo ruhh ruhr rurc rurd ruro ruru ruud ubbo uboc ubod ubud ucbc ucdc ucdd ucfb ucho ucrc udbc udoh udoo ufcu uh-d uhoh uhuh uocc uofo uor- urch urdu urff urho uro- uroo urrh urur uuoc uuuu