a-be a-do a-fu aaaa aaab aaad aaae aaaf aaar aaba aabb aabd aada aade aadu aaea aafa aafb aafd aaff aaoe aaoo aara aard aare aaro aaru abaa abab abad abae abaf abar abau abb- abba abbb abbe abbo abbr abda abdo abdu abed abee aber abff aboa abob abod abof aboo abor abou abra abro abua abud abue abuf adaa adab adad adae adao adar adba adda addd adde addo addr addu adea adeb adee adeo ader adfa adob adod adoe adoo ador adra adre adro adua adub adue adur aeaf aede aeer aer- aera aerd aero afaa afad afao afar afdb afee afer affa affo afoa afoe afoo afor afr- afra afre afro afru afua afud afue aoba aoeu aora aorb aouf arab arad arae araf arar arau arba arbe arda arde ardf ardo ardu area ared aree aref areo areu arfa arfb arff arfu aroa arob arod aroe aroo aror arr- arra arre arro arrr arru arua arub arud arue auaa aube aude audo auer aufe aur- aura aurd aure auro baaa baad baaf baar baba babb babe babo babr babu bada badb badd bade bado badr badu baed baer baff bafo bar- bara barb bard bare barf baro barr baru bau- baud bauf baur bbad bbau bbbb bbdd bbdo bbeb bd-r bduf bead beaf bear beau beba bebb bebe bebo beda bede bedo bedu beeb beed beef beer befa befe beff befo beo- beod beof beor bera berd bere bero berr beru beur boab boad boar boba bobb bobe bobo bobu boda bodb bode bodo bodu boea boee boef boeo boer bofa bofd bofe boff bofu boob bood booe boof boor bor- bora bord bore borf boro borr boru boua boud boue bouf bour brab brad brae braf brao brau brda brdo brea breb bred bree bref breo brer brfu broa brob brod broe broo bror brou brrr brud brue buad buar buba bubb bube bubo bubu buda budb budd bude budo budu buea buer bueu bufe buff bufo bufr bur- bura burb burd bure buro burr buru d-bo daab daad daae daar daau daba dabb dabo dabu dada dade dado dadu daeb daer daeu dafa dafe daff dafo daou dara darb dard dare darf daro darr daru daub daud daue daur dbar dbfo dddd ddre ddub dead deae deaf dear deau deba debe debu deda dedd dede dedo dedu deeb deed deef deer defe deff defo deor der- dera derb dere derf dero derr deua deue deur dfaf dfer dffa dfoe dfrf doab doae doar doba dobb dobe dobu dod- doda dodd dode dodo doea doer doff doob dood doof door dora dord dore dorf doro dorr doru doub doud doue douf dour draa drab drad draf drar drau drba drda drea dred dree dref drob drod drof drou drra drua drub drue druu duaa duab duad duar dub- duba dubb dube dubu duda dudd dude dudo dudu duer duff dufu duo- dura dure duro duru duur eaaf eaba eada eadb eadd eafb eara earb eard eare earo ebba ebbo ebbr ebed eber eboe eboo ebor ebro ebru ebur edad edar edda edde eddo ede- edea eder edfa edfu edod edou edra edru edur eede eedu eeea eeee eefa eefe eera eero efab efbr efda efeo effa efor efua eode eora eore erad eraf erau erba erbb erbe erda erde erdf ereb ered erer erob erod eroe eroo erra erre erro erua erub erur euba eude euer eur- eura eure euro faaa faad faba fabd fabe fabo fabu fada fadd fade fado faeb fafa fafe faff fafo fara farb fard fare faro farr faru faud faue faur fbar fdoa fead feaf fear feba febo feda fede feeb feed feer fefe feff fefo feod feof fera ferb ferd fere fero ferr feru feud ffar ffee ffff ffrr foad foaf foar foba foda fode foed foer fofo food foof for- fora forb ford fore foro forr foua foud four frab frad frae frau frea fred free freo frob froe frou frub frue fuad fuar fubb fubu fuda fudd fude fuff fufu fuor fur- fura fure furo furr o-eo oaau oade oaer oafo oara oare obad obba obbo obea obed ober oboe obor obra obre obro odbo odda oddd odea oded odeo oder odoo odor odou odra odur oedo oera oere oeuf ofdr ofer off- offa offe offo offr offu ofor ofra ofre ooaa ooba oobe ooda ooer ooff oooo oora oord oore orab orad orae orao orar orba orbb orbe orbo orbu orda orde ordo ordu ore- orea oreb ored oreo orer orfe orff orfu oro- oroe orof oror orra orro orub ouad oude ouea oued ouer oufe ouff our- oura oure ouro ouu- raab raad raaf raba rabb rabe rabo rabu rada radd rade rado radr radu raed raef raer rafa rafe raff raob rara rarb rare rarf raro raua raub raud raue rauf rbaf rbbb rbbr rder rdfa rea- read reae reaf reao rear reau reba rebb rebe rebo rebu reda redd rede redo redr redu reeb reed reef refd refe reff refr refu reod reof reou rera rerd rere rero reru reue reuf reuu rfae rfef roab road roaf roar rob- roba robb robe robo robu roda rodd rode rodo roea roed roer rofe roff rofo roob rood roof roor rora rore roro roru roua roub roud roue rouf rrad rred rrrr ruad ruba rubb rube rubu ruda rudd rude rudo rued ruer rufa rufe ruff rufo rura rurd rure ruro ruru ruud uafa uaru uaua ubar ubba ubbe ubbo uber ubod ubra ubud udaa udad udar udau udea uder udoo udra ueba ueda uefa ufer uffa uffe ufra uofa uofo uor- uore urad urao urau urba urbe urda urde urdu ure- urea ured urfa urfe urff uro- uroa uroo urra urre urur uuuu