dddd ddot dntt dnut dod- dodd dodo dond donn dono donr dont dood doon door doot dord dorn doro dorr dort doru dotd doto dott doud doun dour dout drno drod dron drot drou drut druu dtor dtot dudd dudo dudu dunn duno dunt duo- duon durn duro durt duru duur duut nddo ndnt ndor ndut nnnn nnot nntn nodo nodu non- nonn nono nont nonu noo- noon nooo noor noot nor- nord norn noro norr nort not- noto nott noun nour nout nron nrrd ntnd ntnu ntru ntto nttr nudd nudo nunn nuno nunt nuon nurd nurn nurr nurt nuru nutt nutu oddd odon odoo odor odot odou odtu odur ondo onno onod onon onor ont- onto onur onut oont oooo oord oort ordn ordo ordu orno oro- oron oror orot orro orto oto- oton otoo otor otro otto ottu otur oun- ound our- ourn ouro ourt out- outo ouu- rnnt rnod rnot rntd rnut rodd rodo rond rono ront rood roon roor root roro rort roru rotn roto rotr rott roud roun rout rrrr rrun rtdt rtnd rudd rudo rund runn runo runt rurd ruro ruru ruto rutt rutu ruud ruun tdor tndd tnut todd todo todt todu tonn tono tonu tood toon toor toot tord torn toro torr tort toru totd toto totr tott toun tour tout trno trod tron troo trot trou trtr trud trun trut truu tton tttt tudu tund tunn tuno tunu tuor turd turn turo turr turt turu tuto tutt tutu tuuo udon udoo udot udun undo unno unon unro unto unut uor- urdu uro- uroo urun urur urut utor utto uttu uuno uuuu