a-be a-fu aaaa aaab aaae aaaf aaba aabb aabt aaea aafa aafb aaff aata aatf aatt abaa abab abae abaf abat abau abb- abba abbb abbe abbt abee abet abff abta abtu abua abue abuf abut aeaf aeta aetf aett afaa afat afee afet affa afft afta afte afua afue at-t ataa atab atae atat atea atee atef atfb atfe atta atte attu atua atub auaa aube aufe aut- aute baaa baaf baat baba babb babe babu baff baft bata bate batf batt batu bau- bauf bbau bbbb bbeb bbet beaf beat beau beba bebb bebe beeb beef beet befa befe beff beft beta bete bett betu bfta bftt btaa btaf bttb buat buba bubb bube bubu buea bueu bufe buff but- buta bute butt eaaf eaba eafb eata eate ebba eeea eeee eefa eefe eeta eete eetu efab efet effa eft- efta eftu efua etat etee etfa etfb etfe etta ette ettu etua euba faaa faba fabe fabu faeb fafa fafe faff fata fate fatf fatt faue faut feaf feat feba feeb feet fefe feff feta fete fett fetu ffee ffff fftf ftea ftub fuat fubb fubu fuet fuff fufu futa fute futu taa- taaf taat taba tabb tabe tabu tafa tafe taff taft tata tatb tate tatt tatu taua taub taue taut tbaf tbta teat teba tebu teef teet teff teft teta tete tett tetu teut tfae tfeb ttab ttbb ttfa ttff tttt tuae tuat tuba tubb tube tubu tuet tufa tufe tuff tuft tufu tuta tute tutt tutu uafa uata uatu uaua ubba ubbe ubet ubtf ueba uefa uffa uffe utau uttu uuta uutf uuuu