otto ottu otur oucc ouch oun- our- ourn ouro ourt out- outb outh outo ouu- rbbb rbbr rboh rcbc rcbo rccb rccc rchb rcnr rcon rctc rhob rhoc rhoh rhon rhun rnbr rnco rnnt rnot rnut rob- robb robo robt robu rocc roch rock roco rohn rohr rohu rokh rokk roko rokr roku ronc ronk rono ront roob rook roon roor root rorc rork roro rort roru rotc roth rotk rotn roto rotr rott roub rouh rouk roun rout rrrr rrun rtcc rthk rtkn rubb rubu ruch ruck ruct ruhh ruhn ruhr rukh rukk rukn ruku runc runk runn runo runt ruok rurc ruro ruru ruth ruto rutt rutu ruun tbcb tbcc tbrb tccc tccu tch- tchh tcho tchr tchu tcnn tcon tctc thch thnk thnt thon thoo thor thot thou thro thru thtb thtr thuk thun thur tkon tnbc tncc tnut tobo tobt tobu toch tock toco toho tohu toko toku tonb tonh tonk tonn tono tonu tooh took toon toor toot torc tork torn toro torr tort toru totc toth toto totr tott touh touk toun tour tout trcc trno troc tron troo trot trou trtc trtr trub truc truk trun trut truu ttbb ttcn tton tttt tubb tubo tubr tubu tucc tuch tuck tuco tuht tuhu tuko tunb tunc tunk tunn tuno tunu tuor turb turc turk turn turo turr turt turu tuto tutt tutu tuuo ubbo uboc ubon ucbc ucho ucon ucrc ucut uhno uhoh uhok uhuh ukcc ukko uknc ukok ukon ukrc ukur uncc unch unco unct unkn unko unno unon unro untb unth unto unut uocc uor- urch urho uro- urok uroo urrh urth uruk urun urur urut utor utto uttu uuno uuoc uuuu