a-be aaaa aaab aaad aaae aaar aaav aaba aabb aabd aada aade aadu aaea aaev aara aard aare aaru aava abaa abab abad abae abar abau abb- abba abbb abbe abbr abda abdu abed abee aber abra abua abud abue abva abvd adaa adab adad adae adar adba adda addd adde addr addu adea adeb adee ader adra adre adua adub adue adur advb aede aeer aer- aera aerd aeva arab arad arae arar arau arba arbe arda arde ardu area ared aree areu arev arr- arra arre arrr arru arua arub arud arue arva arve auaa aube aude auer aur- aura aurd aure auve avab avar avda avea aver aveu avra avre avur avva baaa baad baar baba babb babe babr babu bada badb badd bade badr badu baed baer bar- bara barb bard bare barr baru bau- baud baur bava bave bavu bbad bbau bbbb bbdd bbeb bd-r bdav bead bear beau beav beba bebb bebe beda bede bedu beeb beed beer bera berd bere berr beru beur brab brad brae brau brav brda brea breb bred bree brer brev brrr brud brue bruv buad buar buba bubb bube bubu buda budb budd bude budu buea buer bueu bur- bura burb burd bure burr buru buvd buve bvdu daab daad daae daar daau daba dabb dabu dada dade dadu daeb daer daeu dara darb dard dare darr daru daub daud daue daur dava dave dbar dddd ddre ddub dead deae dear deau deba debe debu deda dedd dede dedu deeb deed deer deev der- dera derb dere derr derv deua deue deur deva deve draa drab drad drar drau drba drda drea dred dree drev drra drua drub drue druu druv duaa duab duad duar dub- duba dubb dube dubu duda dudd dude dudu duer dura dure duru duur duva duve dvar dvda dvdr dvra eaba eada eadb eadd eara earb eard eare eave ebba ebbr ebed eber ebru ebur edad edar edda edde ede- edea eder edra edru edur edve eede eedu eeea eeee eera eeva erad erau erba erbb erbe erda erde ereb ered erer erev erra erre erua erub erur eruv erve euba eude euer eur- eura eure evae evar evdb evea ever evra evre raab raad raba rabb rabe rabu rada radd rade radr radu raed raer rara rarb rare raua raub raud raue rava rave rbbb rbbr rder rdev rea- read reae rear reau reba rebb rebe rebu reda redd rede redr redu reeb reed reev rera rerd rere reru reue reuu reva revd reve rrad rred rrrr ruad ruba rubb rube rubu ruda rudd rude rued ruer rura rurd rure ruru ruud ruve ruvu rved rver uaru uaua ubar ubba ubbe uber ubra ubud udaa udad udar udau udea uder udev udra ueba ueda urad urau urba urbe urda urde urdu ure- urea ured urra urre urur urva urve uuuu uv-a uv-b uvaa uvae uvda uvea uver uvrd uvvu vaad vaar vada vade vadu vara vard vare varr varu vaud vava vder vdre vdub vear veau veba veda vede veer ver- vera verb verd vere veur veve vrav vrba vred vuda vudu vurb vver vvvv