a-ak a-be aaaa aaab aaad aaae aaba aabb aabd aabt aada aade aadt aaea aaka aake aata aatk aatt abaa abab abad abae abak abat abb- abba abbb abbe abbt abda abed abee abet abta adaa adab adad adae adak adat adba adda addd adde adea adeb adee adet adta aede aedt aeka aeta aett akaa akae aked akee akka akte at-t ataa atab atad atae atak atat atdt atea ated atee atka atkt atta atte baaa baad baak baat baba babb babe bada badb badd bade baed baek bak- baka bake bakt bata bate batt bbad bbbb bbdd bbeb bbet bead beak beat beba bebb bebe beda bede beeb beed beek beet beka beke beta bete bett btaa btdt btek bttb daab daad daae daba dabb dabt dada dade daeb daka dake data date datt dbtt dddd dead deae deak deba debe debt deda dedd dede deeb deed deek deet dek- deka deke deta dete detk dkba dtaa dted dtek eaba eada eadb eadd eata eate ebba ebed edad edda edde ede- edea edta eede eeea eeee eeka eeke eeta eete eka- ekab ekeb eked ekek eket ekka ekta etak etat etee etka etta ette kaaa kaab kaak kaat kaba kabb kabd kabe kad- kada kadd kade kadt kaet kaka kake kakk kakt kat- kata katb katd kate katk katt kbaa kbab kbad kbae kbak kbat kbba kbbb kbbd kbbe kbbk kbbt kbdb kbde kbeb kbed kbee kbek kbet kbkb kbkk kbta kbtb kbte kbtk kbtt kdaa kdab kdad kdae kdak kdat kdbb kddb kddd kddk kdeb kdet kdka kdkb kdkd kdkk kdkt kdta kdtd kea- kead keak keat keba kebb kebe kebt keda kedb kedd kede kedt keed keek keet keka kekb keke ket- keta ketd kete ketk kett kkaa kkat kkba kkbb kkbd kkbe kkbt kkda kkdd kkdt kkea kked kkkk kktk ktaa ktae ktak ktat ktba ktbb ktbt ktdb ktdd ktde ktdk ktea kted ktee ktek ktkb ktke ktkk ktkt kttk kttt taa- taat taba tabb tabe tada tade taka take takk takt tata tatb tate tatt tbta tddb tead teak teat teba teda tedd tede tedk teed teek teet teka teke teta tete tett ttab ttbb tttt