a-be a-fu aaaa aaab aaac aaae aaaf aaba aabb aabc aabt aaca aacb aacc aace aacf aaco aact aacu aaea aaec aafa aafb aafc aaff aaoe aaoo aata aatc aatf aatt abaa abab abac abae abaf abat abau abb- abba abbb abbe abbo abbt abca abcb abcc abcf abct abec abee abet abff aboa abob abof aboo abot abou abta abtu abua abue abuf abut ac-t acaa acab acac acae acat acba acca accc acce accf acco acct accu ace- acea acec acet acfc acfe acft acoa acoe acot acou acta actc acte actf acto actt actu acu- acue acuf acuo acut aeac aeaf aecb aect aeta aetc aetf aeto aett afaa afao afat afca afcb afcc afcu afee afet affa affc affo afft afoa afoe afoo afta aftc afte afua afue aoba aoca aoce aoeu aotc aotf aouf aout at-t ataa atab atac atae atat atca atcc atcf atco atea atec atee atef ateo atfb atfc atfe atob atoc atoe atof atot atta atte atto attu atua atub atuc auaa aube auca auce auct aufc aufe aut- aute auto baaa baaf baat baba babb babe babo babu bac- baca bacc bace baco bact bafc baff bafo baft bata batc bate batf bato batt batu bau- bauf bbau bbbb bbeb bbet bbfc bcaa bcat bcbc bcca bccc bcec bcet bcfc bcof bctc bcuc beaf beat beau beba bebb bebe bebo beca becu beeb beef beet befa befe beff befo beft beo- beof beot beta betc bete beto bett betu bfca bfta bftt boab boac boat boba bobb bobe bobo bobu boca boce boco bocu boea boec boee boef boeo boet bofa bofe boff bofu boob booc booe boof boot bota botb bote boto bott boua boue bouf bout btaa btaf btcc btec btfc btob bttb buat buba bubb bube bubo bubu buca bucc buce buco bucu buea bueu bufc bufe buff bufo but- buta bute buto butt c-bo caaa caab caac caaf caat caba cabe cabf cabo cabu cac- caca cacc cace caco caec caeu cafa cafb cafc cafe caff cafu cat- cata catb catc cate catf cato catt catu cauc cauf cauo caut cbac cbat cbbc cbca cbcc cbce cbct cbcu cbea cbec cbee cbef cbet cbfb cbfc cbot cbta cbtc cbtf ccaa ccab ccac ccaf ccat ccba ccbc ccca cccb cccc cccf cccu ccee ccfa ccfc ccff ccob ccoc cctb cctc cctt ccuc ccut ceac ceat ceba cebu cec- ceca cece ceco cect ceeb ceec cef- cefa cefc ceou cet- ceta cete ceto cfaa cfab cfac cfae cfao cfbc cfbt cfca cfcb cfcf cfco cffb cfoa cfta cftc cfte coat coba cobb cobe cobo cobu coca coce coco coct cocu cofc cofe coff coft coob coof coot cota cotb cotc cote coto cott cotu coua coub coue cout ctab ctae ctba ctca ctcf ctec ctfc ctfo ctot ctta cuau cub- cuba cubb cube cuca cucc cuce cufa cufc cuff cufo cut- cuta cutc cute cuto cutt eaaf eaba eaca eacc eaec eafb eata eate ebac ebba ebbc ebbo ebcc ebfc eboe eboo ecaa ecac ecao ecat ecbc ecbe ecca eccb eccc ecce ecco ecct ecef ecfa ecfc eco- ecot ecou ect- ecta ectc ectf ecto ecua eeca eeea eeee eefa eefe eeoc eeta eetc eete eetu efab efca efco efeo efet effa eft- efta eftu efua eota eotc eoto etat etbc etcc etco etec etee etfa etfb etfc etfe etoe etta ette etto ettu etua euba eubc eufc faaa faac faba fabe fabo fabu faca facc face fact faeb fafa fafc fafe faff fafo fata fatc fate fatf fato fatt faue faut fcab fcat fcba fcca fccf fcot fcto feaf feat feba febo fece fect feeb feet fefc fefe feff fefo feof feta fete fett fetu ffcc ffee ffff fftf foaf foba fobt foca foce foco fofo foof foot fota fote foto fott foua fout ft-c ftea ftfc ftub ftuc fuat fubb fubu fuc- fuca fuct fuet fufc fuff fufu futa fute futo futu o-eo oaau oafc oafo oate obba obbo obea obec obet oboe obot ocab ocac ocat ocbc occa occc occt oce ocee ocef ocet ocfa oct- octa octe octo oec- oeca oecc oeec oeta oeuf off- offa offc offe offo offu ofta ooaa ooba oobe ooff oooo ootb otac otea otee otfc oto- otoe otof otoo otta otte otto ottu ouac ouat oucc ouea oufc oufe ouff out- outa outb oute outo ouu- taa- taaf taat taba tabb tabc tabe tabo tabu taca tacc tace taco tact taec tafa tafc tafe taff tafo taft taoa taou tata tatb tate tato tatt tatu taua taub tauc taue taut tbaf tbca tbcb tbcc tbce tbta tcca tccc tccu tcfc tctc teac teat teba tebo tebu teca teco tect teec teef teet tefc teff teft teta tete teto tett tetu teut tfae tfca tfcu tfeb tfec tfot tftc toab toat toau toba tobe tobo tobt tobu toca toce toco toea toee toet tofa toff tofo toft tofu tooa toof toot tota totc tote toto tott tout ttab ttbb tteo ttfa ttfc ttff ttoe tttt tuae tuao tuat tuba tubb tube tubo tubu tuca tucc tuco tuet tufa tufc tufe tuff tufo tuft tufu tuta tute tuto tutt tutu tuuo uabc uaca uafa uaoc uata uatu uaua ubac ubba ubbe ubbo ubet uboc ubtf ucat ucbc ucca ucea ucfa ucfb ucua ucut ueba uefa ufcu uffa uffe uocc uofa uofo utac utau utec utfo utto uttu uuoc uuta uutf uuuu