rout rova rovo rrat rrna rrrr rrun rtan rtca rtcc rtva ruan ruba rubb rubu ruca ruct runa runc runn runo runt rura rurc ruro ruru ruta ruto rutt rutu ruun ruvu rv-c rvca taa- taan taar taat taba tabb tabc tabo tabu taca tacc taco tact tacv tana tann tano tant tanu taoa taor taou tara tarb tarc tarn taro tarr tart taru tata tatb tato tatr tatt tatu tatv taua taub tauc taur taut tava tavo tbar tbca tbcb tbcc tbrb tbta tcca tccc tccu tcnn tcon tcov tctc tnbc tnca tncc tnut toab toan toat toau toba tobo tobt tobu toca toco tona tonb tonn tono tonu tooa toon toor toot tora torc torn toro torr tort toru torv tota totc toto totr tott toun tour tout touv tova tovo traa trab trac tran trao trat trau trav trca trcc trna trno troa troc tron troo trot trou trra trtc trtr trub truc trun trut truu ttab ttbb ttcn tton tttt tuan tuao tuar tuat tuba tubb tubo tubr tubu tuca tucc tuco tuna tunb tunc tunn tuno tunu tuor tura turb turc turn turo turr turt turu tuta tuto tutt tutu tuuo tuva tvac tvbn tvnb tvon tvro tvrr tvtv uabc uaca uaoc uarc uart uaru uata uatu uatv uaua ubac ubar ubba ubbo uboc ubon ubra ucan ucar ucat ucav ucbc ucca ucon ucrc uctv ucua ucut unaa unac unan unar unat unau unca uncc unco unct unna unno unon unov unra unro untb unto untv unut uocc uor- uovo urac uran urao urat urau urba urca urna uro- uroa uroo urra urun urur urut urva utac utan utau utor utto uttu uuno uuoc uuta uuuu uv-a uv-b uv-c uvaa uvac uvat uvvu vaan vaar vaat vaca vaco vana vanc vann vano vant vanu vara varn varr vart varu vata vato vatt vatu vaut vava vbcc vcat vcon vnav vnto voar voat voca vona vonn vont vooc voor voot vor- vora voro vort voru vota voto voun vour vout vrac vran vrav vrba vrnn vroc vron vrot vrto vtac vtun vuca vuco vuno vurb vurt vutv vvob vvvv