-hou dddd ddot dhod dhor dhur dod- dodd dodo dohr dood door doot dord doro dorr dort doru dotd doth doto dott doud dour dout drod droh drot drou drut druu dthd dtor dtot dudd dudo dudu duhr duhu duo- duro durt duru duur duut hdod hdtt hhhh hodh hodr hoho hood hoor hoot hord horo horr hort hotd hoth hoto hotr hott hotu houd hour hout hrod hrud htoh httr hudd hudo hudu huhu huor huot hurd huro hurr hurt huru huth huto hutt hutu oddd odoh odoo odor odot odou odtu odur ohho ohoh ohto ohtu ooho oooh oooo oord oort ordo ordu oro- oror orot orro orth orto otho othr oto- otoh otoo otor otro otto ottu otur oudh our- ouro ourt out- outh outo ouu- rhod rhoh rodd rodo rohr rohu rood roor root roro rort roru roth roto rotr rott roud rouh rout rrrr rtdt rudd rudo ruhh ruhr rurd ruro ruru ruth ruto rutt rutu ruud tdor thdr thoo thor thot thou thro thru thtr thud thur todd todo todt todu toho tohu tood tooh toor toot tord toro torr tort toru totd toth toto totr tott touh tour tout trod troo trot trou trtr trud trut truu tttt tudu tuht tuhu tuor turd turo turr turt turu tuto tutt tutu tuuo udoh udoo udot uh-d uhoh uhuh uor- urdu urho uro- uroo urrh urth urur urut utor utto uttu uuuu