a-be a-fu aaaa aaab aaae aaaf aaba aabb aabt aaea aafa aafb aaff aaoe aaoo aata aatf aatt abaa abab abae abaf abat abau abb- abba abbb abbe abbo abbt abee abet abff aboa abob abof aboo abot abou abta abtu abua abue abuf abut aeaf aeta aetf aeto aett afaa afao afat afee afet affa affo afft afoa afoe afoo afta afte afua afue aoba aoeu aotf aouf aout at-t ataa atab atae atat atea atee atef ateo atfb atfe atob atoe atof atot atta atte atto attu atua atub auaa aube aufe aut- aute auto baaa baaf baat baba babb babe babo babu baff bafo baft bata bate batf bato batt batu bau- bauf bbau bbbb bbeb bbet beaf beat beau beba bebb bebe bebo beeb beef beet befa befe beff befo beft beo- beof beot beta bete beto bett betu bfta bftt boab boat boba bobb bobe bobo bobu boea boee boef boeo boet bofa bofe boff bofu boob booe boof boot bota botb bote boto bott boua boue bouf bout btaa btaf btob bttb buat buba bubb bube bubo bubu buea bueu bufe buff bufo but- buta bute buto butt eaaf eaba eafb eata eate ebba ebbo eboe eboo eeea eeee eefa eefe eeta eete eetu efab efeo efet effa eft- efta eftu efua eota eoto etat etee etfa etfb etfe etoe etta ette etto ettu etua euba faaa faba fabe fabo fabu faeb fafa fafe faff fafo fata fate fatf fato fatt faue faut feaf feat feba febo feeb feet fefe feff fefo feof feta fete fett fetu ffee ffff fftf foaf foba fobt fofo foof foot fota fote foto fott foua fout ftea ftub fuat fubb fubu fuet fuff fufu futa fute futo futu o-eo oaau oafo oate obba obbo obea obet oboe obot oeta oeuf off- offa offe offo offu ofta ooaa ooba oobe ooff oooo ootb otea otee oto- otoe otof otoo otta otte otto ottu ouat ouea oufe ouff out- outa outb oute outo ouu- taa- taaf taat taba tabb tabe tabo tabu tafa tafe taff tafo taft taoa taou tata tatb tate tato tatt tatu taua taub taue taut tbaf tbta teat teba tebo tebu teef teet teff teft teta tete teto tett tetu teut tfae tfeb tfot toab toat toau toba tobe tobo tobt tobu toea toee toet tofa toff tofo toft tofu tooa toof toot tota tote toto tott tout ttab ttbb tteo ttfa ttff ttoe tttt tuae tuao tuat tuba tubb tube tubo tubu tuet tufa tufe tuff tufo tuft tufu tuta tute tuto tutt tutu tuuo uafa uata uatu uaua ubba ubbe ubbo ubet ubtf ueba uefa uffa uffe uofa uofo utau utfo utto uttu uuta uutf uuuu