a-be a-ii aaaa aaab aaae aaai aaar aaba aabb aabi aaea aaib aaii aaoe aaoo aara aare aari aaro aaru abaa abab abae abai abar abau abb- abba abbb abbe abbi abbo abbr abee aber abia abib abie abir abiu aboa abob aboo abor abou abra abri abro abua abue aebi aeer aeio aer- aera aeri aero aiai aiba aibo aiea aiee aiia aiib aiir aioi aira aire airi airo aiui aoba aoeu aora aorb arab arae arai arar arau arba arbe arbi area aree arei areo areu aria arib arie arii ario aroa arob aroe aroi aroo aror arr- arra arre arri arro arrr arru arua arub arue arui auaa aube auer aur- aura aure auri auro ba-i baaa baar baba babb babe babi babo babr babu baer baia baib baie baio bair bar- bara barb bare bari baro barr baru bau- baur bbau bbbb bbeb bear beau beba bebb bebe bebi bebo beeb beer beia beir beo- beor bera bere beri bero berr beru beur biao biar biba bibb bibe bibi bibo bieb bier bieu bio- bioi biou bira birb bire biri biro birr biru boab boai boar boba bobb bobe bobi bobo bobu boea boee boeo boer boi- boie boii boiu boob booe boor bor- bora bore bori boro borr boru boua boue bour brab brae brai brao brau brea breb bree brei breo brer bria brie brio broa brob broe broo bror brou brrr brue buar buba bubb bube bubi bubo bubu buea buer bueu buie buir buiu bur- bura burb bure buri buro burr buru eaba eaiu eara earb eare earo ebba ebbo ebbr eber eboe eboo ebor ebro ebru ebur eeea eeee eera eero eiao eiei eier eiou eira eire eoir eora eore eori erau erba erbb erbe ereb erei erer eria erie erio eriu erob eroe eroi eroo erra erre erro erua erub erur euba eubi euer euoi eur- eura eure euro i-be iaaa iaai iaba iaea iaia iara iare iaru ibar ibea ibia ibie ibra ibri ibro ieie ieio iera iere ieri iiie iiii iiio iioi iioo iira ioba iobi ioee ioii ioio iooi iooo iora iore iori irae irai irao irar irbe iree irer iri- iria irie irio irob irra irre irri iuiu iura o-eo oaau oaer oara oare obai obba obbo obea ober obia obie oboe oboi obor obra obre obri obro oera oere oiba oier oiii oira oire ooaa ooba oobe oobi ooer ooia oooo oora oore orab orae orai orao orar orba orbb orbe orbi orbo orbu ore- orea oreb oreo orer ori- oria orie orio oro- oroe oror orra orri orro orub ouea ouer ouie ouii ouir our- oura oure ouro ouu- raab raba rabb rabe rabi rabo rabu raer raia raie raii rair raiu raob rara rarb rare rari raro raua raub raue rbbb rbbr rea- reae reao rear reau reba rebb rebe rebo rebu reeb reia reii reir reiu reou rera rere reri rero reru reue reuu riaa riab riai riau rib- riba ribe ribo ribu rier rieu riia riou rire riri riue roab roar rob- roba robb robe robi robo robu roea roer roia roio roir roiu roob rooi roor rora rore rori roro roru roua roub roue rrrr ruba rubb rube rubi rubu ruer rura rure ruri ruro ruru u-ie uair uaru uaua ubar ubba ubbe ubbi ubbo uber ubii ubir ubra ueba ueir uira uirr uor- uore urai urao urau urba urbe urbi ure- urea uria urib urie uriu uro- uroa uroo urra urre urri urur uuri uuuu