rnbr rnco rnnt rnot rnut rob- robb robe robo robt robu rocc roce roco roen roer roet rofc rofe roff rofo ronc rone rono ront roob roof roon roor root rorc rore roro rort roru rotc rote rotn roto rotr rott roub roue rouf roun rout rrfc rrrr rrun rtbf rtcc rtce rtee rtfb rtfc rubb rube rubu ruce ruct ruen ruer ruet rufc rufe ruff rufo ruft runc rune runf runn runo runt rurc rure ruro ruru rute ruto rutt rutu ruun tbcb tbcc tbce tbnf tbrb tccc tccu tcfc tcnn tcon tctc tebo tebu teco tecr tect teec teef teen teer teet tefc teff teft tenb tenc tene tenn teno tent tenu teon teor ter- terc tere terf tern tero terr teru tete teto tetr tett tetu teut tfcu tfeb tfec tfot tftc tnbc tncc tneb tnef tnfc tnut tobe tobo tobt tobu toce toco toee toen toer toet toff tofo toft tofu tonb tone tonn tono tonu toof toon toor toot torc tore torf torn toro torr tort toru totc tote toto totr tott toun tour tout trcc tre- trec tree tref tren treo tret treu trfc trfr trno troc troe tron troo trot trou trtc trte trtr trub truc true trun trut truu ttbb ttcn tten tteo tter ttfc ttff ttfn ttoe tton tttt tubb tube tubo tubr tubu tucc tuco tuen tuer tuet tufc tufe tuff tufo tuft tufu tunb tunc tune tunn tuno tunu tuor turb turc ture turf turn turo turr turt turu tute tuto tutt tutu tuuo ubbe ubbo uber ubet uboc ubon ubtf ucbc ucfb ucon ucrc ucut ueno ufcu ufer uffe unbe uncc unce uncf unco unct uneb unec unee unef unen uner unne unno unon unrf unro untb unte unto unut uocc uofo uone uor- uore urbe ure- uret urfe urff urft urne uro- uroo urre urte urun urur urut utec uter utfo utne utor utto uttu uuen uuno uuoc uutf uuuu