a-ii aaaa aaab aaai aaar aaba aabb aabi aaib aaii aara aari aaru abaa abab abai abar abau abb- abba abbb abbi abbr abia abib abir abiu abra abri abua aiai aiba aiia aiib aiir aira airi aiui arab arai arar arau arba arbi aria arib arii arr- arra arri arrr arru arua arub arui auaa aur- aura auri ba-i baaa baar baba babb babi babr babu baia baib bair bar- bara barb bari barr baru bau- baur bbau bbbb biar biba bibb bibi bira birb biri birr biru brab brai brau bria brrr buar buba bubb bubi bubu buir buiu bur- bura burb buri burr buru iaaa iaai iaba iaia iara iaru ibar ibia ibra ibri iiii iira irai irar iri- iria irra irri iuiu iura raab raba rabb rabi rabu raia raii rair raiu rara rarb rari raua raub rbbb rbbr riaa riab riai riau rib- riba ribu riia riri rrrr ruba rubb rubi rubu rura ruri ruru uair uaru uaua ubar ubba ubbi ubii ubir ubra uira uirr urai urau urba urbi uria urib uriu urra urri urur uuri uuuu