a-be aaaa aaab aaae aaar aaav aaba aabb aabt aaea aaev aaoe aaoo aara aare aaro aart aaru aata aatt aava abaa abab abae abar abat abau abb- abba abbb abbe abbo abbr abbt abee aber abet aboa abob aboo abor abot abou abov abra abro abta abtu abua abue abut abva aeer aer- aera aero aeta aeto aetr aett aeva aoba aoeu aora aorb aort aout arab arae arar arat arau arba arbe area aree areo aret areu arev aroa arob aroe aroo aror arr- arra arre arro arrr arrt arru arta arte arto artr artv arua arub arue arut arva arve arvo at-t ataa atab atae atar atat atea atee ateo ater atob atoe ator atot atra atre atro atru atta atte atto attr attu atua atub atur auaa aube auer aur- aura aure auro aut- aute auto auve avab avao avar avat avea aveo aver aveu avor avot avou avra avre avro avur avva avvo baaa baar baat baba babb babe babo babr babu baer bar- bara barb bare baro barr bart baru bata bate bato batt batu bau- baur bava bave bavu bbau bbbb bbeb bbet bear beat beau beav beba bebb bebe bebo beeb beer beet beo- beor beot bera bere bero berr bert beru beta bete beto bett betu betv beur bevo boab boar boat boba bobb bobe bobo bobu boea boee boeo boer boet boob booe boor boot bor- bora bore boro borr bort boru bota botb bote boto bott boua boue bour bout bova bove bovo brab brae brao brat brau brav brea breb bree breo brer bret brev broa brob broe broo bror brot brou brrr brue brut bruv btaa btob btor btrt bttb buar buat buba bubb bube bubo bubu buea buer bueu bur- bura burb bure buro burr burt buru but- buta bute buto butt buve eaba eara earb eare earo eart eata eate eave ebba ebbo ebbr eber eboe eboo ebor ebro ebru ebur eeea eeee eera eero eeta eete eetu eeva eora eore eota eoto erat erau erba erbb erbe ereb erer eret erev erob eroe eroo erra erre erro erta ertu erua erub erur eruv erve etat etbr etee eter etoe etra etre etro etta ette etto ettu etua etvo euba euer eur- eura eure euro eurt evae evar evat evea ever evet evoe evoo evra evre o-eo oaau oaer oara oare oate obba obbo obea ober obet oboe obor obot obra obre obro oera oere oeta ooaa ooba oobe ooer oooo oora oore oort ootb orab orae orao orar orat orav orba orbb orbe orbo orbu ore- orea oreb oreo orer oro- oroe oror orot orra orro orta orte orto orub orve orvr otar otea otee oter oto- otoe otoo otor otov otra otre otro otta otte otto ottu otur ouat ouea ouer our- oura oure ouro ourt out- outa outb oute outo ouu- ovar ovee over ovet ovo- ovoo ovot ovra ovre raab raat raba rabb rabe rabo rabu raer raob rara rarb rare raro rata rate rato ratt ratu raua raub raue raut rava rave rbbb rbbr rea- reae reao rear reat reau reba rebb rebe rebo rebu reeb reet reev reot reou rera rere rero rert reru reta rete reto retr rett reue reut reuu reva reve revo roab roar roat rob- roba robb robe robo robt robu roea roer roet roev roob roor root rora rore roro rort roru rota rote roto rotr rott roua roub roue rout rova rove rovo rrat rrrr rtee rtva rtve ruba rubb rube rubu ruer ruet rura rure ruro ruru ruta rute ruto rutt rutu ruve ruvu rver taa- taar taat taba tabb tabe tabo tabu taer taoa taor taou tara tarb tare taro tarr tart taru tata tatb tate tato tatr tatt tatu tatv taua taub taue taur taut tava tave tavo tbar tbrb tbta tear teat teba tebo tebu teer teet teev teor ter- tera tere tero terr teru teta tete teto tetr tett tetu teut teva toab toat toau toba tobe tobo tobt tobu toea toee toer toet tooa toor toot tora tore toro torr tort toru torv tota tote toto totr tott tour tout touv tova tove tovo traa trab trae trao trat trau trav tre- trea tree treo tret treu trev troa troe troo trot trou trra trte trtr trub true trut truu ttab ttbb tteo tter ttoe tttt tuae tuao tuar tuat tuba tubb tube tubo tubr tubu tuer tuet tuor tura turb ture turo turr turt turu tuta tute tuto tutt tutu tuuo tuva tver tvro tvrr tvtv uart uaru uata uatu uatv uaua ubar ubba ubbe ubbo uber ubet ubra ueba uor- uore uovo urao urat urau urba urbe ure- urea uret uro- uroa uroo urra urre urte urur urut urva urve utau uter utor utto uttu uuta uuuu uv-a uv-b uvaa uvae uvat uvea uver uvvu vaar vaat vara vare varr vart varu vata vate vato vatt vatu vaut vava vear veat veau veba veer veet veor ver- vera verb vere vero vert veta vete veto vetr veur veve vevo voar voat voer voet voeu voor voot vor- vora vore voro vort voru vota vote voto voue vour vout vrav vrba vreo vret vrot vrto vurb vurt vutv vver vvob vvvv