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-hou bbbb bbdd bbdo bblb bd-r bddh bhdl bhor bhot bhrt bhur bhut bhuu blbt bldr blob blod bloo blot blou blub blud blur blut bobb bobo bobu bodb bodh bodo bodu bohd bohl boho bohr boht bohu bold boll bolo bolt bolu boob bood booh bool boor boot bor- bord borh boro borr bort boru botb botd both boto bott boud bouh boul bour bout brdo brdt brob brod broh brol broo bror brot brou brrr brud bruh brut btdt btob btor btrt bttb bubb bubo bubu budb budd budl budo budu buhl buho buhr bulb buld bull bult bulu buol bur- burb burd burh burl buro burr burt buru but- buto butt d-bo dbtt dddd ddot ddub dhod dhol dhor dhul dhur dlbd dobb dobl dobu dod- dodd dodo dohl dohr dold doll dolo dolt dolu doob dood dool door doot dord doro dorr dort doru dotd doth doto dott doub doud doul dour dout drob drod droh drol drot drou drub drut druu dthd dtor dtot dtrl dub- dubb dubh dubu dudd dudo dudu duhl duhr duhu dull dulo dult dulu duo- duro durt duru duul duur duut hbtl hbtu hdod hdtt hhhh hlod hlul hobo hodh hodr hohl hoho hol- holb hold holh holl holo holt holu hood hool hoor hoot hord horl horo horr hort hotb hotd hoth hotl hoto hotr hott hotu houd hour hout hrbl hrob hrod hrtb hrud htoh htol httr hubb hubl hubo hudd hudl hudo hudu huhu huld hull hult hulu huor huot hurd hurl huro hurr hurt huru huth huto hutt hutu huub lblr lbrt lhhh lhor lldb llll llod lloo llud lob- lobb lobh lobo lodh loho lohr lohu lold loll lolo loob lood lool loor loot lord loro lotd loth lotl loto lotr lott loud louh loul lour lout louu lrdd lrrr ltbl lthr lttr ludd ludo luhu lull lulu luoh lurd lurt luth obbo obdt oblu obol obor obot obrh obro obtd obuh odbo oddd odoh odoo odor odot odou odrl odtu odur ohho ohob ohoh ohto ohtu olbo oldb oldh ollo olor olot oltu olur ooho oold oolo oooh oooo oord oort ootb orbb orbo orbu ordo ordu orlo orlu oro- oror orot orro orth orto orub otbd otho othr oto- otoh otoo otor otro otto ottu otur oudh ould oulu our- ouro ourt out- outb outh outo ouu- rbbb rbbr rboh rhob rhod rhoh rldt rob- robb robo robt robu rodd rodo rohl rohr rohu rold roll rolo rolt roob rood rool roor root roro rort roru roth rotl roto rotr rott roub roud rouh roul rout rrrr rtdt rtlt rubb rubu rudd rudl rudo ruhh ruhl ruhr rull rulo rurd ruro ruru ruth rutl ruto rutt rutu ruud tbrb tddb tdor thdr thoo thor thot thou thro thru thtb thtr thud thul thur tldr tobo tobt tobu todd todo todt todu toho tohu tol- told toll tolo tolt tolu tood tooh tool toor toot tord toro torr tort toru totd toth toto totr tott