a-be a-fu aaaa aaab aaae aaaf aaar aaba aabb aabt aaea aafa aafb aaff aaoe aaoo aara aare aaro aart aaru aata aatf aatt abaa abab abae abaf abar abat abau abb- abba abbb abbe abbo abbr abbt abee aber abet abff aboa abob abof aboo abor abot abou abra abro abta abtu abua abue abuf abut aeaf aeer aer- aera aero aeta aetf aeto aetr aett afaa afao afar afat afee afer afet affa affo afft afoa afoe afoo afor afr- afra afre afro afru afta afte afua afue aoba aoeu aora aorb aort aotf aouf aout arab arae araf arar arat arau arba arbe area aree aref areo aret areu arfa arfb arff arft arfu aroa arob aroe aroo aror arr- arra arre arro arrr arrt arru arta arte arto artr arua arub arue arut at-t ataa atab atae atar atat atea atee atef ateo ater atfb atfe atob atoe atof ator atot atra atre atro atru atta atte atto attr attu atua atub atur auaa aube auer aufe aur- aura aure auro aut- aute auto baaa baaf baar baat baba babb babe babo babr babu baer baff bafo baft bar- bara barb bare barf baro barr bart baru bata bate batf bato batt batu bau- bauf baur bbau bbbb bbeb bbet beaf bear beat beau beba bebb bebe bebo beeb beef beer beet befa befe beff befo beft beo- beof beor beot bera bere bero berr bert beru beta bete beto bett betu beur bfta bftt boab boar boat boba bobb bobe bobo bobu boea boee boef boeo boer boet bofa bofe boff bofu boob booe boof boor boot bor- bora bore borf boro borr bort boru bota botb bote boto bott boua boue bouf bour bout brab brae braf brao brat brau brea breb bree bref breo brer bret brfu broa brob broe broo bror brot brou brrr brue brut btaa btaf btob btor btrt bttb buar buat buba bubb bube bubo bubu buea buer bueu bufe buff bufo bufr bur- bura burb bure buro burr burt buru but- buta bute buto butt eaaf eaba eafb eara earb eare earo eart eata eate ebba ebbo ebbr eber eboe eboo ebor ebro ebru ebur eeea eeee eefa eefe eera eero eeta eete eetu efab efbr efeo efet effa efor eft- efta eftu efua eora eore eota eoto eraf erat erau erba erbb erbe ereb erer eret erft erob eroe eroo erra erre erro erta ertu erua erub erur etat etbr etee eter etfa etfb etfe etoe etra etre etro etta ette etto ettu etua euba euer eur- eura eure euro eurt faaa faba fabe fabo fabu faeb fafa fafe faff fafo fara farb fare faro farr fart faru fata fate fatf fato fatt faue faur faut fbar feaf fear feat feba febo feeb feer feet fefe feff fefo feof fera ferb fere fero ferr fert feru feta fete fetr fett fetu ffar ffee ffff ffrr fftf foaf foar foba fobt foer fofo foof foot for- fora forb fore foro forr fort fota fote foto fott foua four fout frab frae frat frau frea free freo fret frob froe frot frou frta frub frue ftea fter ftub fuar fuat fubb fubu fuet fuff fufu fuor fur- fura fure furo furr furt futa fute futo futu o-eo oaau oaer oafo oara oare oate obba obbo obea ober obet oboe obor obot obra obre obro oera oere oeta oeuf ofer off- offa offe offo offr offu ofor ofra ofre ofta ooaa ooba oobe ooer ooff oooo oora oore oort ootb orab orae orao orar orat orba orbb orbe orbo orbu ore- orea oreb oreo orer orfe orff orfu oro- oroe orof oror orot orra orro orta orte orto orub otar otea otee oter oto- otoe otof otoo otor otra otre otro otta otte otto ottu otur ouat ouea ouer oufe ouff our- oura oure ouro ourt out- outa outb oute outo ouu- raab raaf raat raba rabb rabe rabo rabu raef raer rafa rafe raff raft raob rara rarb rare rarf raro rata rate ratf rato ratt ratu raua raub raue rauf raut rbaf rbbb rbbr rea- reae reaf reao rear reat reau reba rebb rebe rebo rebu reeb reef reet refe reff refr reft refu reof reot reou rera rere rero rert reru reta rete reto retr rett reue reuf reut reuu rfae rfef roab roaf roar roat rob- roba robb robe robo robt robu roea roer roet rofe roff rofo roob roof roor root rora rore roro rort roru rota rote roto rotr rott roua roub roue rouf rout rrat rrrr rtbf rtee rtfb ruba rubb rube rubu ruer ruet rufa rufe ruff rufo ruft rura rure ruro ruru ruta rute ruto rutt rutu taa- taaf taar taat taba tabb tabe tabo tabu taer tafa tafe taff tafo taft taoa taor taou tara tarb tare tarf taro tarr tart taru tata tatb tate tato tatr tatt tatu taua taub taue taur taut tbaf tbar tbrb tbta tear teat teba tebo tebu teef teer teet teff teft teor ter- tera tere terf tero terr teru teta tete teto tetr tett tetu teut tfae tfeb tfot toab toat toau toba tobe tobo tobt tobu toea toee toer toet tofa toff tofo toft tofu tooa toof toor toot tora tore torf toro torr tort toru tota tote toto totr tott tour tout traa trab trae traf trao trat trau tre- trea tree tref treo tret treu trfr troa troe troo trot trou trra trte trtr trub true trut truu ttab ttbb tteo tter ttfa ttff ttoe tttt tuae tuao tuar tuat tuba tubb tube tubo tubr tubu tuer tuet tufa tufe tuff tufo tuft tufu tuor tura turb ture turf turo turr turt turu tuta tute tuto tutt tutu tuuo uafa uart uaru uata uatu uaua ubar ubba ubbe ubbo uber ubet ubra ubtf ueba uefa ufer uffa uffe ufra uofa uofo uor- uore urao urat urau urba urbe ure- urea uret urfa urfe urff urft uro- uroa uroo urra urre