dddd dfrf dod- dodd dodo doff domm domo dood doof doom door dord dorf dorm doro dorr doru doud douf doum dour drod drof drom drou drum druu dudd dudo dudu duff dufu dumm duo- duro duru duur fdom ffff ffrr fmod fofo fomo food foof foom for- ford form foro forr foud four from frou frum fudd fuff fufu fumo fuor fur- furm furo furr mddm mdmf mdud mfor mfou mmdf mmfd mmff mmmd mmmm mmod mmor mmrf modd modo modu moff mofo mofu momo momu mood moor mord morf moro moru moud mouf mour mrdd mrmd mrud mudd mudu muff mufu mumm mumo mumu murd muro murr muru oddd odmr odom odoo odor odou odum odur ofdr off- offo offr offu ofor omo- omoo omor omro omuo ooff oooo oord ordo ordu orff orfu ormo oro- orof orom oror orro orum ouff our- ouro ouu- rodd rodo roff rofo romd romm romo rood roof room roor roro roru roud rouf roum rrrr rrum rudd rudo ruff rufo rumm rumo rurd ruro ruru ruud udoo umff ummo umor uofm uofo uomo uor- urdu urff uro- urom uroo urum urur uuuu