a-fu aaaa aaab aaaf aaar aaba aabb aabt aafa aafb aaff aara aart aaru aata aatf aatt abaa abab abaf abar abat abau abb- abba abbb abbr abbt abff abra abta abtu abua abuf abut afaa afar afat affa afft afr- afra afru afta afua arab araf arar arat arau arba arfa arfb arff arft arfu arr- arra arrr arrt arru arta artr arua arub arut at-t ataa atab atar atat atfb atra atru atta attr attu atua atub atur auaa aur- aura aut- baaa baaf baar baat baba babb babr babu baff baft bar- bara barb barf barr bart baru bata batf batt batu bau- bauf baur bbau bbbb bfta bftt brab braf brat brau brfu brrr brut btaa btaf btrt bttb buar buat buba bubb bubu buff bufr bur- bura burb burr burt buru but- buta butt faaa faba fabu fafa faff fara farb farr fart faru fata fatf fatt faur faut fbar ffar ffff ffrr fftf frab frat frau frta frub ftub fuar fuat fubb fubu fuff fufu fur- fura furr furt futa futu raab raaf raat raba rabb rabu rafa raff raft rara rarb rarf rata ratf ratt ratu raua raub rauf raut rbaf rbbb rbbr rrat rrrr rtbf rtfb ruba rubb rubu rufa ruff ruft rura ruru ruta rutt rutu taa- taaf taar taat taba tabb tabu tafa taff taft tara tarb tarf tarr tart taru tata tatb tatr tatt tatu taua taub taur taut tbaf tbar tbrb tbta traa trab traf trat trau trfr trra trtr trub trut truu ttab ttbb ttfa ttff tttt tuar tuat tuba tubb tubr tubu tufa tuff tuft tufu tura turb turf turr turt turu tuta tutt tutu uafa uart uaru uata uatu uaua ubar ubba ubra ubtf uffa ufra urat urau urba urfa urff urft urra urur urut utau uttu uuta uutf uuuu