-hou dddd dhod dhol dhor dhul dhur dod- dodd dodo dohl dohm dohr dold doll dolo dolu domm domo dood dool doom door dord dorm doro dorr doru doud doul doum dour drod droh drol drom drou drum druu dudd dudo dudu duhl duhr duhu dull dulo dulu dumh dumm duo- duro duru duul duur hdml hdod hdrm hhhh hlod hlul hmmm hodh hodr hohl hohm hoho hol- hold holh holl holm holo holu hom- homo homr homu hood hool hoom hoor hord horl horo horr houd hour hrod hrud hudd hudl hudo hudu huhu huld hull hulu humh humm humo huor hurd hurl huro hurr huru lddm lhhh lhor llll llod lloo llud lmmr lodh loho lohr lohu lold loll lolo lomm lomo lomu lood lool loom loor lord loro loud louh loul loum lour louu lrdd lrrr ludd ludo luhu lull lulu lumo luoh lurd mddl mddm mdud mhmm mhmr mhor mldr mmdl mmhl mmhm mmmd mmmh mmmm mmod mmor modd modh modo modu mohl mohm moho mohr mohu mold moll molo molr momo momu mood mool moor mord morl moro moru moud moul mour mrdd mrmd mrml mrud mudd mudl mudu muhr muhu muld mull mulm mulo mulu mumm mumo mumu murd murl muro murr muru oddd odmr odoh odom odoo odor odou odrl odum odur ohho ohoh ohum oldh olhm ollo olmo olom olor olur omo- omoo omor omro omul omuo ooho oold oolo oooh oooo oord ordo ordu orlo orlu ormo oro- orom oror orro orum oudh ould oulu our- ouro ouu- rhod rhoh rhum rlml rmll rodd rodo rohl rohm rohr rohu rold roll rolm rolo romd romm romo rood rool room roor roro roru roud rouh roul roum rrrr rrum rudd rudl rudo ruhh ruhl ruhm ruhr rull rulo ruml rumm rumo rurd ruro ruru ruud udoh udoo uh-d uhoh uhuh ullo ullr ulmo ulmu ulo- ulul ulum ummo umol umor uoml uomo uor- urdu urho uro- urol urom uroo urrh urum urur uulu uuuu