a-be aaaa aaab aaae aaba aabb aabt aaea aata aatt abaa abab abae abaj abat abb- abba abbb abbe abbt abee abet abta aeta aett ajab ajat ajba ajee ajet at-t ataa atab atae atat atea atee atta atte baaa baat baba babb babe baja bata bate batt bbbb bbeb bbet beat beba bebb bebe beeb beej beet beja beta bete bett btaa bttb eaba eata eate ebba eeea eeee eeta eete etat etee etta ette jaba jaja jbaa jeat jebb jebe jeet jeta jetb jete jett taa- taat taba tabb tabe tata tatb tate tatt tbta teat teba teej teet teja teta tete tett ttab ttbb tttt