a-be aaaa aaab aaae aaba aabb aabt aaea aage aata aatt abaa abab abae abag abat abb- abba abbb abbe abbt abee abet abta aega aeta aett agag agat agba agea agee aget agga agge agta agte at-t ataa atab atae atat atea atee atta atte baaa baat baba babb babe baga bage bagg bagt bata bate batt bbbb bbeb bbet bbga beag beat beba bebb bebe beeb beeg beet bega begg beta bete bett btaa bttb eaba eaga eage eata eate ebba eeea eeee eega eeta eete egaa egae egat egba egbe egea egee eggb egge egta egte etag etat etee etta ette gaba gabb gabe gabt gaea gaga gage gagg gata gate gatt gbag geab geat geba gebe geet gege gegg geta getb gete getg gett ggbt gggg gtaa gtea gtta taa- taag taat taba tabb tabe taga tage tagg tata tatb tate tatt tbta teat teba teet tega tegg tegt teta tete tett ttab ttbb tttt