a-be aaaa aaab aaae aaam aaba aabb aabm aaea aaem aama aamb aame abaa abab abae abaj abam abb- abba abbb abbe abee abma abmb ajab ajam ajba ajee amaa amae amaj amam amb- amba ambe amee amm- amma amme baaa baam baba babb babe babm baja bama bamb bame bamm bbbb bbeb beam beba bebb bebe beeb beej beem beja bema beme bmaa bmaj eaba eama eame ebam ebba eeea eeee emae emaj emam emba embe emma emme jaba jaja jama jamb jbaa jebb jebe jeem jema jemm jjam maaa maam maba mabe maee maem maja mama mame mbam mbba mebe meem meja meje mema meme mmaa mmab mmea mmjb mmmm