a-be aaaa aaab aaae aaav aaba aabb aabt aaea aaev aata aatt aava abaa abab abae abat abau abb- abba abbb abbe abbt abee abet abta abtu abua abue abut abva aeta aett aeva at-t ataa atab atae atat atea atee atta atte attu atua atub auaa aube aut- aute auve avab avat avea aveu avva baaa baat baba babb babe babu bata bate batt batu bau- bava bave bavu bbau bbbb bbeb bbet beat beau beav beba bebb bebe beeb beet beta bete bett betu betv btaa bttb buat buba bubb bube bubu buea bueu but- buta bute butt buve eaba eata eate eave ebba eeea eeee eeta eete eetu eeva etat etee etta ette ettu etua euba evae evat evea evet taa- taat taba tabb tabe tabu tata tatb tate tatt tatu tatv taua taub taue taut tava tave tbta teat teba tebu teet teev teta tete tett tetu teut teva ttab ttbb tttt tuae tuat tuba tubb tube tubu tuet tuta tute tutt tutu tuva tvtv uata uatu uatv uaua ubba ubbe ubet ueba utau uttu uuta uuuu uv-a uv-b uvaa uvae uvat uvea uvvu vaat vata vate vatt vatu vaut vava veat veau veba veet veta vete veve vutv vvvv