a-be aaaa aaab aaae aaba aabb aabt aaea aata aatt abaa abab abae abat abau abb- abba abbb abbe abbt abee abet abta abtu abua abue abut aeta aett aqu- aqua aque at-t ataa atab atae ataq atat atea atee atta atte attu atua atub auaa aube aut- aute baaa baat baba babb babe babu baqa baqt bata bate batt batu bau- bbau bbbb bbbq bbeb bbet beat beau beba bebb bebe beeb beet beqa beta bete bett betu bque btaa bttb buat buba bubb bube bubq bubu buea bueu buqa but- buta bute butt eaba eata eate ebba eeea eeee eeta eete eetu equ- equa eque etat etee etta ette ettu etua euba q-be qqqq quaa quab quae quat quba qube quee quet qutb qute quu- taa- taat taba tabb tabe tabu taqa taqu tata tatb tate tatt tatu taua taub taue taut tbta teat teba tebu teet teta tete tett tetu teut ttab ttbb tttt tuae tuat tuba tubb tube tubu tuet tuta tute tutt tutu uata uatu uaua ubba ubbe ubet ueba uqat utau uttu utuq uuta uuuu