a-be a-ii aaaa aaab aaae aaai aaba aabb aabi aaea aaib aaii abaa abab abae abai abau abb- abba abbb abbe abbi abee abia abib abie abiu abua abue aebi aiai aiba aiea aiee aiia aiib aiui auaa aube ba-i baaa baba babb babe babi babu baia baib baie bau- bbau bbbb bbeb beau beba bebb bebe bebi beeb beia biba bibb bibe bibi bieb bieu buba bubb bube bubi bubu buea bueu buie buiu eaba eaiu ebba eeea eeee eiei euba eubi i-be iaaa iaai iaba iaea iaia ibea ibia ibie ieie iiie iiii iuiu u-ie uaua ubba ubbe ubbi ubii ueba uuuu