a-be a-ii aaaa aaab aaae aaai aaar aaba aabb aabi aaea aaib aaii aara aare aari aaru abaa abab abae abai abar abau abb- abba abbb abbe abbi abbr abee aber abia abib abie abir abiu abra abri abua abue aebi aeer aer- aera aeri aiai aiba aiea aiee aiia aiib aiir aira aire airi aiui arab arae arai arar arau arba arbe arbi area aree arei areu aria arib arie arii arr- arra arre arri arrr arru arua arub arue arui auaa aube auer aur- aura aure auri ba-i baaa baar baba babb babe babi babr babu baer baia baib baie bair bar- bara barb bare bari barr baru bau- baur bbau bbbb bbeb bear beau beba bebb bebe bebi beeb beer beia beir bera bere beri berr beru beur biar biba bibb bibe bibi bieb bier bieu bira birb bire biri birr biru brab brae brai brau brea breb bree brei brer bria brie brrr brue buar buba bubb bube bubi bubu buea buer bueu buie buir buiu bur- bura burb bure buri burr buru eaba eaiu eara earb eare ebba ebbr eber ebru ebur eeea eeee eera eiei eier eira eire erau erba erbb erbe ereb erei erer eria erie eriu erra erre erua erub erur euba eubi euer eur- eura eure i-be iaaa iaai iaba iaea iaia iara iare iaru ibar ibea ibia ibie ibra ibri ieie iera iere ieri iiie iiii iira irae irai irar irbe iree irer iri- iria irie irra irre irri iuiu iura raab raba rabb rabe rabi rabu raer raia raie raii rair raiu rara rarb rare rari raua raub raue rbbb rbbr rea- reae rear reau reba rebb rebe rebu reeb reia reii reir reiu rera rere reri reru reue reuu riaa riab riai riau rib- riba ribe ribu rier rieu riia rire riri riue rrrr ruba rubb rube rubi rubu ruer rura rure ruri ruru u-ie uair uaru uaua ubar ubba ubbe ubbi uber ubii ubir ubra ueba ueir uira uirr urai urau urba urbe urbi ure- urea uria urib urie uriu urra urre urri urur uuri uuuu