-hou dddd dfrf dhod dhol dhor dhul dhur dod- dodd dodo doff dohl dohr dold dolf doll dolo dolu dood doof dool door dord dorf doro dorr doru doud douf doul dour drod drof droh drol drou druu dudd dudo dudu duff dufu duhl duhr duhu dull dulo dulu duo- duro duru duul duur fdlr ffff ffrr fldr flod floo flor flou flud fluf fluo flur fofo fohr fold foll folo folr food foof fool for- ford forl foro forr foud foul four froh frol frou fudd fuff fufu full fulu fuor fur- furl furo furr hdod hhhh hhof hlod hlul hodh hodr hoff hofu hohl hoho hol- hold holh holl holo holu hood hoof hool hoor hord horl horo horr houd houf hour hrod hrud hudd hudl hudo hudu huff hufu huhu huld hull hulu huor hurd hurl huro hurr huru lfrd lhhh lhor llll llod lloo llud lodh loff loho lohr lohu lold loll lolo lood loof lool loor lord loro loud louh loul lour louu lrdd lrrr ludd ludo luff lufu luhu lull lulu luoh lurd oddd odoh odoo odor odou odrl odur ofdr off- offh offo offr offu ofor ohho ohoh oldh ollo olof olor olur ooff ooho oold oolo oooh oooo oord ordo ordu orff orfu orlo orlu oro- orof oror orro oudh ouff ould oulu our- ouro ouu- rffl rhod rhoh rodd rodo roff rofl rofo rohl rohr rohu rold rolf roll rolo rood roof rool roor roro roru roud rouf rouh roul rrrr rudd rudl rudo ruff rufo ruhh ruhl ruhr rull rulo rurd ruro ruru ruud udoh udoo uh-d uhoh uhuh ullo ullr ulo- ulul uofl uofo uor- urdu urff urho uro- urol uroo urrh urur uulu uuuu