a-be aaaa aaab aaad aaae aaar aaba aabb aabd aabt aada aade aadt aadu aaea aara aard aare aart aaru aata aatt abaa abab abad abae abar abat abau abb- abba abbb abbe abbr abbt abda abdu abed abee aber abet abra abta abtu abua abud abue abut adaa adab adad adae adar adat adba adda addd adde addr addu adea adeb adee ader adet adra adre adta adua adub adue adur aede aedt aeer aer- aera aerd aeta aetr aett arab arad arae arar arat arau arba arbe arda arde ardu area ared aree aret areu 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 ater atra atre atru atta atte attr attu atua atub atur auaa aube aude auer aur- aura aurd aure aut- aute baaa baad baar baat baba babb babe babr babu bada badb badd bade badr badu baed baer bar- bara barb bard bare barr bart baru bata bate batt batu bau- baud baur bbad bbau bbbb bbdd bbeb bbet bd-r bead bear beat beau beba bebb bebe beda bede bedu beeb beed beer beet bera berd bere berr bert beru beta bete bett betu beur brab brad brae brat brau brda brdt brea breb bred bree brer bret brrr brud brue brut btaa btdt btrt bttb buad buar buat buba bubb bube bubu buda budb budd bude budu buea buer bueu 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 dara darb dard dare darr dart daru data date datr datt datu daub daud daue daur daut dbar dbtt dddd ddre ddub dead deae dear deau deba debe debt debu deda dedd dede dedu deeb deed deer deet der- dera derb dere derr deta dete detr deua deue deur deut draa drab drad drar drat drau drba drda drea dred dree 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 dura dure durt duru duta dute duur duut eaba eada eadb eadd eara earb eard eare eart eata eate ebba ebbr ebed eber ebru ebur edad edar edda edde ede- edea eder edra edru edta edur eede eedu eeea eeee eera eeta eete eetu erad erat erau erba erbb erbe erda erde ereb ered erer eret erra erre erta ertu erua erub erur etat etbr etee eter etra etre etta ette ettu etua euba eude euer eur- eura eure eurt raab raad raat raba rabb rabe rabu rada radd rade radr radt radu raed raer rara rarb rare rata rate ratt ratu raua raub raud raue raut rbbb rbbr rder rea- read reae rear reat reau reba rebb rebe rebu reda redd rede redr redu reeb reed reet rera rerd rere rert reru reta retd rete retr rett reue reut reuu rrad rrat rred rrrr rtdt rtee ruad ruba rubb rube rubu ruda rudd rude rued ruer ruet rura rurd rure ruru ruta rute rutt rutu ruud taa- taar taat taba tabb tabe tabu tada tade taer tara tarb tard tare tarr tart taru tata tatb tate tatr tatt tatu taua taub taue taur taut tbar tbrb tbta tddb tdra tead tear teat teba tebu teda tedd tede teed teer teet ter- tera tere terr teru teta tete tetr tett tetu teut traa trab trad trae trat trau tre- trea tred tree tret treu trra trte trtr trub trud true trut truu ttab ttbb tter tttt tuae tuar tuat tuba tubb tube tubr tubu tude tudu tuer tuet tura turb turd ture turr turt turu tuta tute tutt tutu uart uaru uata uatu uaua ubar ubba ubbe uber ubet ubra ubud udaa udad udar udau udea uder udet udra ueba ueda urad urat urau urba urbe urda urde urdu ure- urea ured uret urra urre urte urur urut utau uter uttu uuta uuuu