a-be aaaa aaab aaae aaav aaba aabb aabt aaea aaev aaoe aaoo aata aatt aava abaa abab abae abat abau abb- abba abbb abbe abbo abbt abee abet aboa abob aboo abot abou abov abta abtu abua abue abut abva aeta aeto aett aeva aoba aoeu aout at-t ataa atab atae atat atea atee ateo atob atoe atot atta atte atto attu atua atub auaa aube aut- aute auto auve avab avao avat avea aveo aveu avot avou avva avvo baaa baat baba babb babe babo babu bata bate bato batt batu bau- bava bave bavu bbau bbbb bbeb bbet beat beau beav beba bebb bebe bebo beeb beet beo- beot beta bete beto bett betu betv bevo boab boat boba bobb bobe bobo bobu boea boee boeo boet boob booe boot bota botb bote boto bott boua boue bout bova bove bovo btaa btob bttb buat buba bubb bube bubo bubu buea bueu but- buta bute buto butt buve eaba eata eate eave ebba ebbo eboe eboo eeea eeee eeta eete eetu eeva eota eoto etat etee etoe etta ette etto ettu etua etvo euba evae evat evea evet evoe evoo o-eo oaau oate obba obbo obea obet oboe obot oeta ooaa ooba oobe oooo ootb otea otee oto- otoe otoo otov otta otte otto ottu ouat ouea out- outa outb oute outo ouu- ovee ovet ovo- ovoo ovot taa- taat taba tabb tabe tabo tabu taoa taou tata tatb tate tato tatt tatu tatv taua taub taue taut tava tave tavo tbta teat teba tebo tebu teet teev teta tete teto tett tetu teut teva toab toat toau toba tobe tobo tobt tobu toea toee toet tooa toot tota tote toto tott tout touv tova tove tovo ttab ttbb tteo ttoe tttt tuae tuao tuat tuba tubb tube tubo tubu tuet tuta tute tuto tutt tutu tuuo tuva tvtv uata uatu uatv uaua ubba ubbe ubbo ubet ueba uovo utau utto uttu uuta uuuu uv-a uv-b uvaa uvae uvat uvea uvvu vaat vata vate vato vatt vatu vaut vava veat veau veba veet veta vete veto veve vevo voat voet voeu voot vota vote voto voue vout vutv vvob vvvv