-hou dddd ddot dhod dhol dhor dhul dhur dod- dodd dodo dohl dohr dold doll dolo dolt dolu dood dool door doot dord doro dorr dort doru dotd doth doto dott doud doul dour dout drod droh drol drot drou drut druu dthd dtor dtot dtrl dudd dudo dudu duhl duhr duhu dull dulo dult dulu duo- duro durt duru duul duur duut hdod hdtt hhhh hlod hlul hodh hodr hohl hoho hol- hold holh holl holo holt holu hood hool hoor hoot hord horl horo horr hort hotd hoth hotl hoto hotr hott hotu houd hour hout hrod hrud htoh htol httr hudd hudl hudo hudu huhu huld hull hult hulu huor huot hurd hurl huro hurr hurt huru huth huto hutt hutu lhhh lhor llll llod lloo llud lodh loho lohr lohu lold loll lolo lood lool loor loot lord loro lotd loth lotl loto lotr lott loud louh loul lour lout louu lrdd lrrr lthr lttr ludd ludo luhu lull lulu luoh lurd lurt luth oddd odoh odoo odor odot odou odrl odtu odur ohho ohoh ohto ohtu oldh ollo olor olot oltu olur ooho oold oolo oooh oooo oord oort ordo ordu orlo orlu oro- oror orot orro orth orto otho othr oto- otoh otoo otor otro otto ottu otur oudh ould oulu our- ouro ourt out- outh outo ouu- rhod rhoh rldt rodd rodo rohl rohr rohu rold roll rolo rolt rood rool roor root roro rort roru roth rotl roto rotr rott roud rouh roul rout rrrr rtdt rtlt rudd rudl rudo ruhh ruhl ruhr rull rulo rurd ruro ruru ruth rutl ruto rutt rutu ruud tdor thdr thoo thor thot thou thro thru thtr thud thul thur tldr 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 touh toul tour tout trod troo trot trou trtr trud trut truu tttt ttul tudu tuht tuhu tull tulo tulu tuor turd turo turr turt turu tutl tuto tutt tutu tuuo udoh udoo udot uh-d uhoh uhuh ullo ullr ulo- ulto ultt ulul uor- urdu urho uro- urol uroo urrh urth urur urut utor utto uttu uulu uuuu