a-be a-fu aaaa aaab aaad aaae aaaf aaar aaba aabb aabd aabt aada aade aadt aadu aaea aafa aafb aafd aaff aara aard aare aart aaru aata aatf aatt abaa abab abad abae abaf abar abat abau abb- abba abbb abbe abbr abbt abda abdu abed abee aber abet abff abra abta abtu abua abud abue abuf abut adaa adab adad adae adar adat adba adda addd adde addr addu adea adeb adee ader adet adfa adra adre adta adua adub adue adur aeaf aede aedt aeer aer- aera aerd aeta aetf aetr aett afaa afad afar afat afdb afee afer afet affa afft afr- afra afre afru afta afte afua afud afue arab arad arae araf arar arat arau arba arbe arda arde ardf ardu area ared aree aref aret areu arfa arfb arff arft arfu arr- arra arre arrr arrt arru arta arte artr arua arub arud arue arut at-t ataa atab atad atae atar atat atdt atea ated atee atef ater atfb atfe atra atre atru atta atte attr attu atua atub atur auaa aube aude auer aufe aur- aura aurd aure aut- aute baaa baad baaf baar baat baba babb babe babr babu bada badb badd bade badr badu baed baer baff baft bar- bara barb bard bare barf barr bart baru bata bate batf batt batu bau- baud bauf baur bbad bbau bbbb bbdd bbeb bbet bd-r bduf bead beaf bear beat beau beba bebb bebe beda bede bedu beeb beed beef beer beet befa befe beff beft bera berd bere berr bert beru beta bete bett betu beur bfta bftt brab brad brae braf brat brau brda brdt brea breb bred bree bref brer bret brfu brrr brud brue brut btaa btaf btdt btrt bttb buad buar buat buba bubb bube bubu buda budb budd bude budu buea buer bueu bufe buff bufr bur- bura burb burd bure burr burt buru but- buta bute butt daab daad daae daar daau daba dabb dabt dabu dada dade dadu daeb daer daeu dafa dafe daff daft dara darb dard dare darf darr dart daru data date datr datt datu daub daud daue daur daut dbar dbtt dddd ddre ddub dead deae deaf dear deau deba debe debt debu deda dedd dede dedu deeb deed deef deer deet defe deff deft der- dera derb dere derf derr deta dete detr deua deue deur deut dfaf dfdt dfer dffa dfrf dftr draa drab drad draf drar drat drau drba drda drea dred dree dref dret drra drua drub drue drut druu dtaa dted duaa duab duad duar duat dub- duba dubb dube dubu duda dudd dude dudu duer duet duff dufu dura dure durt duru duta dute duur duut eaaf eaba eada eadb eadd eafb eara earb eard eare eart eata eate ebba ebbr ebed eber ebru ebur edad edar edda edde ede- edea eder edfa edfu edra edru edta edur eede eedu eeea eeee eefa eefe eera eeta eete eetu efab efbr efda efet effa eft- efta eftu efua erad eraf erat erau erba erbb erbe erda erde erdf ereb ered erer eret erft erra erre erta ertu erua erub erur etat etbr etee eter etfa etfb etfe etra etre etta ette ettu etua euba eude euer eur- eura eure eurt faaa faad faba fabd fabe fabu fada fadd fade faeb fafa fafe faff fara farb fard fare farr fart faru fata fate fatf fatt faud faue faur faut fbar fead feaf fear feat feba feda fede feeb feed feer feet fefe feff fera ferb ferd fere ferr fert feru feta fete fetr fett fetu feud ffar ffee ffff ffrr fftf frab frad frae frat frau frea fred free fret frta frub frue ftea fter ftub fuad fuar fuat fubb fubu fuda fudd fude fuet fuff fufu fur- fura fure furr furt futa fute futu raab raad raaf raat raba rabb rabe rabu rada radd rade radr radt radu raed raef raer rafa rafe raff raft rara rarb rare rarf rata rate ratf ratt ratu raua raub raud raue rauf raut rbaf rbbb rbbr rder rdfa rea- read reae reaf rear reat reau reba rebb rebe rebu reda redd rede redr redu reeb reed reef reet refd refe reff refr reft refu rera rerd rere rert reru reta retd rete retr rett reue reuf reut reuu rfae rfef rrad rrat rred rrrr rtbf rtdt rtee rtfb ruad ruba rubb rube rubu ruda rudd rude rued ruer ruet rufa rufe ruff ruft rura rurd rure ruru ruta rute rutt rutu ruud taa- taaf taar taat taba tabb tabe tabu tada tade taer tafa tafe taff taft tara tarb tard tare tarf tarr tart taru tata tatb tate tatr tatt tatu taua taub taue taur taut tbaf tbar tbrb tbta tddb tdff tdra tead tear teat teba tebu teda tedd tede teed teef teer teet teff teft ter- tera tere terf terr teru teta tete tetr tett tetu teut tfae tfeb traa trab trad trae traf trat trau tre- trea tred tree tref tret treu trfd trfr trra trte trtr trub trud true trut truu ttab ttbb tter ttfa ttff tttt tuae tuar tuat tuba tubb tube tubr tubu tude tudu tuer tuet tufa tufe tuff tuft tufu tura turb turd ture turf turr turt turu tuta tute tutt tutu uafa uart uaru uata uatu uaua ubar ubba ubbe uber ubet ubra ubtf ubud udaa udad udar udau udea uder udet udra ueba ueda uefa ufer uffa uffe ufra urad urat urau urba urbe urda urde urdu ure- urea ured uret urfa urfe urff urft urra urre urte urur urut utau uter uttu uuta uutf uuuu