a-be aaaa aaab aaad aaae aaba aabb aabd aabt aada aade aadt aadu aaea aata aatt abaa abab abad abae abat abau abb- abba abbb abbe abbt abda abdu abed abee abet abta abtu abua abud abue abut adaa adab adad adae adat adba adda addd adde addu adea adeb adee adet adta adua adub adue aede aedt aeta aett at-t ataa atab atad atae atat atdt atea ated atee atta atte attu atua atub auaa aube aude aut- aute baaa baad baat baba babb babe babu bada badb badd bade badu baed bata bate batt batu bau- baud bbad bbau bbbb bbdd bbeb bbet bead beat beau beba bebb bebe beda bede bedu beeb beed beet beta bete bett betu btaa btdt bttb buad buat buba bubb bube bubu buda budb budd bude budu buea bueu but- buta bute butt daab daad daae daau daba dabb dabt dabu dada dade dadu daeb daeu data date datt datu daub daud daue daut dbtt dddd ddub dead deae deau deba debe debt debu deda dedd dede dedu deeb deed deet deta dete deua deue deut dtaa dted duaa duab duad duat dub- duba dubb dube dubu duda dudd dude dudu duet duta dute duut eaba eada eadb eadd eata eate ebba ebed edad edda edde ede- edea edta eede eedu eeea eeee eeta eete eetu etat etee etta ette ettu etua euba eude taa- taat taba tabb tabe tabu tada tade tata tatb tate tatt tatu taua taub taue taut tbta tddb tead teat teba tebu teda tedd tede teed teet teta tete tett tetu teut ttab ttbb tttt tuae tuat tuba tubb tube tubu tude tudu tuet tuta tute tutt tutu uata uatu uaua ubba ubbe ubet ubud udaa udad udau udea udet ueba ueda utau uttu uuta uuuu