a-be aaaa aaab aaad aaae aaba aabb aabd aabt aada aade aadt aaea aage aata aatt abaa abab abad abae abag abat abb- abba abbb abbe abbt abda abed abee abet abgd abta adaa adab adad adae adag adat adba adda addd adde adea adeb adee adet adta aede aedt aega aeta aett agad agag agat agba agda agde agea aged agee aget agga agge agta agte at-t ataa atab atad atae atat atdt atea ated atee atta atte baaa baad baat baba babb babe bada badb badd bade baed baga bage bagg bagt bata bate batt bbad bbbb bbdd bbeb bbet bbga bead beag beat beba bebb bebe beda bede beeb beed beeg beet bega begg beta bete bett btaa btdt bttb daab daad daae daag daba dabb dabt dada dade daeb daga dage dagg data date datt dbag dbtt dddd dead deae deba debe debt deda dedd dede deeb deed deeg deet dega dege deta dete dgeg dgge dtaa dted eaba eada eadb eadd eaga eage eata eate ebba ebed edad edag edda edde ede- edea edge edta eede eeea eeee eega eeta eete egaa egad egae egat egba egbe egea egee eggb egge egta egte etag etat etee etta ette gaba gabb gabe gabt gada gadd gade gaea gaed gaga gage gagg gata gate gatt gbag gbde gddb geab gead geat geba gebe geda gedd gede geed geet gege gegg geta getb gete getg gett ggbt gggg gtaa gtea gtta taa- taag taat taba tabb tabe tada tade tadg taga tage tagg tata tatb tate tatt tbta tddb tead teat teba teda tedd tede teed teet tega tegg tegt teta tete tett ttab ttbb tttt