a-fu aaaa aaab aaac aaaf aaal aaba aabb aabc aabl aabt aaca aacb aacc aacf aacl aaco aact aacu aafa aafb aafc aaff aafl aala aalc aall aalo aalu aaoo aata aatc aatf aatt abaa abab abac abaf abal abat abau abb- abba abbb abbo abbt abca abcb abcc abcf abcl abct abff abla ablo aboa abob abof abol aboo abot abou abta abtu abua abuf abul abut ac-t acaa acab acac acat acba acbl acca accc accf acco acct accu acfc acfl acft acla aclc aclu acoa acol acot acou acta actc actf actl acto actt actu acu- acuf acul acuo acut afaa afao afat afca afcb afcc afcu affa affc affo afft afla aflc afoa afol afoo afta aftc afua alaa alac alal alao alat alau alb- alba albc albo albu alca alcc alco alfa all- alla alll allo allu aloa aloc alof alol aloo alot alou alta alto alua aluf alut aoba aoca aola aotc aotf aouf aoul aout at-l at-t ataa atab atac atal atat atca atcc atcf atcl atco atfb atfc atla atlo atob atoc atof atol atot atta atto attu atua atub atuc atul auaa auca auct aufc aul- aula aulf aull aulo ault aulu auol aut- auto baaa baaf baal baat baba babb babo babu bac- baca bacc baco bact bafc baff bafo baft bala balc balf ball balo balt balu baol bata batc batf bato batt batu bau- bauf baul bbau bbbb bbfc bblb bcaa bcat bcbc bcca bccc bccl bcfc bcof bctc bcuc bfca bffl bfta bftt blaa blab blac blat blau blbt blcu blfc blob bloc bloo blot blou blub bluf blut boab boac boal boat boba bobb bobo bobu boca boco bocu bofa boff bofu bola boll bolo bolt bolu boob booc boof bool boot bota botb boto bott boua bouf boul bout btaa btaf btcc btcl btfc btla btob bttb bual buat buba bubb bubo bubu buca bucc buco bucu bufc buff bufo bula bulb bull bult bulu buol but- buta buto butt c-bo caaa caab caac caaf caal caat caba cabf cabo cabu cac- caca cacc caco cafa cafb cafc caff cafl cafu cala calc calf call calo calt calu caol cat- cata catb catc catf cato catt catu cauc cauf caul cauo caut cbac cbal cbat cbbc cbca cbcc cbcl cbct cbcu cbfb cbfc cblb cblc cbol cbot cbta cbtc cbtf cbtl ccaa ccab ccac ccaf ccat ccba ccbc ccca cccb cccc cccf cccl cccu ccfa ccfc ccff ccfl ccla cclc ccob ccoc cctb cctc cctl cctt ccuc ccut cfaa cfab cfac cfao cfbc cfbt cfca cfcb cfcf cfcl cfco cffb cfoa cfta cftc cftl clab claf clat clau clob clof cloo clot clou cltb cltc club clut coal coat coba cobb cobo cobu coca coco coct cocu cofc coff coft col- cola colb coll colo colt colu coob coof cool coot cota cotb cotc coto cott cotu coua coub coul cout ctab ctal ctba ctca ctcf ctfc ctfo ctol ctot ctta cuau cub- cuba cubb cuca cucc cufa cufc cuff cufo cula culb culc cull culo cult cut- cuta cutc cuto cutt faaa faac faba fabo fabu faca facc fact fafa fafc faff fafo fala falc fall falo falt falu fata fatc fatf fato fatt faul faut fbla fcab fcal fcat fcba fcca fccf fcot fcto ffcc ffff fftf flab flac flao flat flcl flob floc floo flot flou flub fluf fluo foaf foal foba fobt foca foco fofo fola folc foll folo folt foof fool foot fota foto fott foua foul fout ft-c ft-l ftfc ftlb ftub ftuc fuat fubb fubu fuc- fuca fuct fufc fuff fufu fula full fulu futa futo futu laaa laac laal laat laba labo labu laca lacc lacl laco lact lacu lafb lafc laff laft lala lall lalo lalu laou lata latc lato latt latu laub lauf laul laut lbcc lcac lcat lcbc lcca lccc lcfc lctl lcto lfat lfca lfcc llao llat llcc lllc llll lloa lloc lloo loac loaf loat lob- loba lobb lobo loca locc loco locu lofa loff loft lola loll lolo loob looc loof lool loot lota lotl loto lott loul lout louu ltac ltbf ltbl ltcc ltfc lttc ltuc luau luba luca luff luft lufu lula lull lulu luta luua oaau oafc oafo oall obal obba obbo obla oblu obol obot ocab ocac ocal ocat ocbc occa occc occt ocfa oclc oct- octa octo ocul ofcl off- offa offc offo offu ofla ofta olac olaf olat olba olbo olca olcc olfa olla ollo olof olot olta oltu ooaa ooba ooff oola oolo oooo ootb otac otcl otfc oto- otof otoo otta otto ottu ouac ouat oucc oufc ouff oula oulu out- outa outb outo ouu- taa- taaf taal taat taba tabb tabc tabl tabo tabu taca tacc tacl taco tact tafa tafc taff tafo taft tala talc tall talo talu taoa taou tata tatb tato tatt tatu taua taub tauc taul taut tbaf tbca tbcb tbcc tbta tcca tccc tccu tcfc tctc tcul tfal tfca tfcu tfot tftc tlac tlco toab toal toat toau toba tobo tobt tobu toca toco tofa toff tofo toft tofu tol- tola toll tolo tolt tolu tooa toof tool toot tota totc toto tott toul tout ttab ttbb ttfa ttfc ttff tttt ttul tual tuao tuat tuba tubb tubo tubu tuca tucc tuco tufa tufc tuff tufo tuft tufu tula tull tulo tulu tuta tutl tuto tutt tutu tuuo uabc uaca uafa uaoc uata uatu uaua ubac ubal ubba ubbo ubla ublo uboc ubtf ucal ucat ucbc ucca ucfa ucfb ucla ucua ucut ufcu uffa ulaa ulbc ulcc ulco ulft ulla ullo ulo- uloc ulta ulto ultt ulua ulul uocc uofa uofl uofo uolc utac utal utau utfo utto uttu uulu uuoc uuta uutf uuuu