-hou dddd dhod dhol dhor dhul dhur dod- dodd dodo dohl dohr dold doll dolo dolu dood dool door dord doro dorr doru doud doul dour drod droh drol drou druu dudd dudo dudu duhl duhr duhu dull dulo dulu duo- duro duru duul duur hdod hhhh hlod hlul hodh hodr hohl hoho hol- hold holh holl holo holu hood hool hoor hord horl horo horr houd hour hrod hrud hudd hudl hudo hudu huhu huld hull hulu huor hurd hurl huro hurr huru lhhh lhor llll llod lloo llud lodh loho lohr lohu lold loll lolo lood lool loor lord loro loud louh loul lour louu lrdd lrrr ludd ludo luhu lull lulu luoh lurd oddd odoh odoo odor odou odrl odur ohho ohoh oldh ollo olor olur ooho oold oolo oooh oooo oord ordo ordu orlo orlu oro- oror orro oudh ould oulu our- ouro ouu- rhod rhoh rodd rodo rohl rohr rohu rold roll rolo rood rool roor roro roru roud rouh roul rrrr rudd rudl rudo ruhh ruhl ruhr rull rulo rurd ruro ruru ruud udoh udoo uh-d uhoh uhuh ullo ullr ulo- ulul uor- urdu urho uro- urol uroo urrh urur uulu uuuu