dddd ddot dfdt dfrf dftr dmdt dmft dmtf dod- dodd dodo doff domm domo dood doof doom door doot dord dorf dorm doro dorr dort doru dotd doto dott doud douf doum dour dout drod drof drom drot drou drum drut druu dtor dtot dudd dudo dudu duff dufu dumm duo- duro durt duru duur duut fdom fdot ffff ffrr fftf fmod fofo fomo fomt food foof foom foot for- ford form foro forr fort fotm foto fott foud four fout from frot frou frum fudd fuff fufu fumo fuor fur- furm furo furr furt futo futu mddm mdmf mdot mdud mfor mfou mftf mmdf mmfd mmff mmmd mmmm mmod mmor mmrf modd modo modu moff mofo mofu momo momu mood moor moot mord morf moro mort moru motd motm moto mott motu moud mouf mour mout mrdd mrmd mrtm mrtt mrud mtff mtom mtor mtrr mttr mudd mudu muff mufu mumm mumo mumu murd muro murr murt muru muto mutt mutu muut oddd odmr odom odoo odor odot odou odtu odum odur ofdr off- offo offr offu ofor omo- omoo omor omro omuo ooff oooo oord oort ordo ordu orff orfu ormo oro- orof orom oror orot orro orto orum oto- otof otoo otor otro otto ottu otur ouff our- ouro ourt out- outo ouu- rmtu rodd rodo roff rofo romd romm romo rood roof room roor root roro rort roru roto rotr rott roud rouf roum rout rrrr rrum rtdt rtfm rudd rudo ruff rufo ruft rumm rumo rumt rurd ruro ruru ruto rutt rutu ruud t-mo tdff tdor tfot tmou tmro tmtt todd todo todt todu toff tofo toft tofu tomm tomo tomt tood toof toom toor toot tord torf torm toro torr tort toru totd totm toto totr tott toum tour tout trfd trfm trfr trmd trmu trod trom troo trot trou trtr trud trut truu ttff tttt tudu tuff tufm tufo tuft tufu tumu tuor turd turf turm turo turr turt turu tuto tutt tutu tuum tuuo udoo udot umff ummo umor umut uofm uofo uomo uor- urdu urff urft uro- urom uroo urum urur urut utfo utor utto uttu uutf uuuu