a-be a-fu aaaa aaab aaac aaae aaaf aaal aaba aabb aabc aabl aaca aacb aacc aace aacf aacl aacu aaea aaec aafa aafb aafc aaff aafl aala aalc aale aall aalu abaa abab abac abae abaf abal abau abb- abba abbb abbe abca abcb abcc abcf abcl abec abee abel abff abla able abua abue abuf abul acaa acab acac acae acba acbl acca accc acce accf accu ace- acea acec acel acfc acfe acfl acla aclc acle aclu acu- acue acuf acul aeac aeaf aecb aecl aela aelc afaa afca afcb afcc afcu afee afel affa affc afla aflc afle afua afue alaa alac alae alal alau alb- alba albc albe albu alca alcc alce alea alec alee alef aleu alfa alfe all- alla alle alll allu alua aluf auaa aube auca auce auel aufc aufe aul- aula aule aulf aull aulu baaa baaf baal baba babb babe babu bac- baca bacc bace bael bafc baff bala balc bale balf ball balu bau- bauf baul bbau bbbb bbeb bbfc bblb bcaa bcbc bcca bccc bccl bcec bcfc bcuc beaf beal beau beba bebb bebe beca becu beeb beef beel befa befe beff bela bele bell belu bfca bffl blaa blab blac blae blau blcu blea bleb blee bleu blfc blub blue bluf bual buba bubb bube bubu buca bucc buce bucu buea buel bueu bufc bufe buff bula bulb bule bull bulu caaa caab caac caaf caal caba cabe cabf cabu cac- caca cacc cace caec caeu cafa cafb cafc cafe caff cafl cafu cala calc cale calf call calu cauc cauf caul cbac cbal cbbc cbca cbcc cbce cbcl cbcu cbea cbec cbee cbef cbfb cbfc cblb cblc ccaa ccab ccac ccaf ccba ccbc ccca cccb cccc cccf cccl cccu ccee ccel ccfa ccfc ccff ccfl ccla cclc ccuc ceac ceal ceba cebu cec- ceca cece ceeb ceec ceel cef- cefa cefc cel- cela celc cele celf cell cfaa cfab cfac cfae cfbc cfca cfcb cfcf cfcl cffb clab claf clau clea clec clee clef cleu club clue cuau cub- cuba cubb cube cuca cucc cuce cufa cufc cuff cula culb culc cule cull e-cl e-la eaaf eaba eaca eacc eaec eafb eala ealc eale ebac ebal ebba ebbc ebcc ebel ebfc ebla ebul ecaa ecac ecal ecbc ecbe ecca eccb eccc ecce eccl ecef ecfa ecfc ecla ecua eeca eeea eeee eefa eefe eefl eele efab efca effa efla efua el-b elab elac elal elba elbe elbu elca elcb elce elea elec elee elef elfa elfc elfe ella elle ellu elue elul euba eubc eufc eula eule faaa faac faba fabe fabu faca facc face faeb fafa fafc fafe faff fala falc fale fall falu faue faul fbla fble fcab fcal fcba fcca fccf feaf feal feba fece feeb feel fefc fefe feff fela fele felf fell ffcc ffee ffff flab flac flae flcl flea flee flub flue fluf fubb fubu fuc- fuca fuel fufc fuff fufu fula fule full fulu laaa laac laal laba labe labu laca lacc lace lacl lacu lael lafb lafc lafe laff lala lale lall lalu laub laue lauf laul lbcc lcac lcbc lcca lccc lcce lcfc le-u leaa leaf leal leau leba lebu leca lece leea leef leel lefa lefe leff lela lele lell lelu leuc lfca lfcc llcc llef lleu lllc llll luau luba lube luca luce luef lufe luff lufu lula lule lull lulu luua uabc uaca uafa uaua ubac ubal ubba ubbe ubla uble ucal ucbc ucca ucea ucel ucfa ucfb ucla ucua ueba uefa uele uell ufcu ufel uffa uffe ulaa ulae ulbc ulcc ulea uleb ulee ulfe ulla ulle ulua ulul uulu uuuu