rebe rebk rebu reca recc rece reck recr rect recu reeb reek reet reka reke rekt rera rere rert reru reta rete retr rett reue reuk reut reuu rrat rrrr rtca rtcc rtce rtee ruba rubb rube rubu ruca ruce ruck ruct ruer ruet ruka ruke rukk ruku rura rurc rure ruru ruta rute rutt rutu taa- taar taat taba tabb tabc tabe tabu taca tacc tace tack tact taec taer taka take takk takt taku tara tarb tarc tare tark tarr tart taru tata tatb tate tatr tatt tatu taua taub tauc taue tauk taur taut tbar tbca tbcb tbcc tbce tbrb tbta tcca tccc tccu tctc teac teak tear teat teba tebu teca teck tecr tect teec teek teer teet teka teke ter- tera terc tere terk terr teru teta tete tetr tett tetu teuk teut tkac traa trab trac trae trak trat trau trca trcc tre- trea trec tree trek tret treu trra trtc trte trtr trub truc true truk trut truu ttab ttbb tter tttt tuae tuak tuar tuat tuba tubb tube tubr tubu tuca tucc tuck tuer tuet tuka tuke tura turb turc ture turk turr turt turu tuta tute tutt tutu uabc uaca uarc uart uaru uata uatu uaua ubac ubar ubba ubbe ubek uber ubet ubra ucak ucar ucat ucbc ucca ucea ucka ucrc ucua ucut ueba ukba ukcc ukek ukeu ukra ukrc ukta ukur urac urat urau urba urbe urca ure- urea uret urka urke urra urre urte uruk urur urut utac utau utec uter uttu uuta uuuu