a-be a-fu aaaa aaab aaac aaad aaae aaaf aaal aaba aabb aabc aabd aabl aaca aacb aacc aacd aace aacf aacl aacu aada aadc aade aadu aaea aaec aafa aafb aafc aafd aaff aafl aala aalc aald aale aall aalu abaa abab abac abad abae abaf abal abau abb- abba abbb abbe abca abcb abcc abcd abcf abcl abda abdu abec abed abee abel abff abla able abua abud abue abuf abul acaa acab acac acad acae acba acbl acca accc accd acce accf accu acda acdb acdc acde acdf ace- acea acec aced acel acfc acfd acfe acfl acla aclc acle aclu acu- acue acuf acul adaa adab adac adad adae adal adba adbc adcc adda addc addd adde addl addu adea adeb adee adel adfa adfc adfl adle adua adub adue aeac aeaf aecb aecl aede aela aelc afaa afad afca afcb afcc afcu afdb afdc afdl afee afel affa affc afla aflc afle afua afud afue alaa alac alad alae alal alau alb- alba albc albe albu alca alcc alce ald- alda alde aldl alea alec aled alee alef aleu alfa alfe all- alla alle alll allu alua aluf auaa aube auca auce audc aude auel aufc aufe aul- aula auld aule aulf aull aulu baaa baad baaf baal baba babb babe babu bac- baca bacc bace bada badb badd bade badu baed bael bafc baff bala balc bald bale balf ball balu bau- baud bauf baul bbad bbau bbbb bbdd bbeb bbfc bblb bcaa bcbc bcca bccc bccl bcda bcde bcec bcfc bcuc bdbc bddc bdle bduf bead beaf beal beau beba bebb bebe beca becu beda bede bedl bedu beeb beed beef beel befa befe beff bela beld bele bell belu bfca bffl blaa blab blac blad blae blau blcu bldc blea bleb bled blee bleu blfc blub blud blue bluf buad bual buba bubb bube bubu buca bucc buce bucu buda budb budd bude budl budu buea buel bueu bufc bufe buff bula bulb buld bule bull bulu c-cd caaa caab caac caaf caal caba cabe cabf cabu cac- caca cacc cace cada cadc cadd cade cadu caec caeu cafa cafb cafc cafe caff cafl cafu cala calc cald cale calf call calu cauc cauf caul cbac cbal cbbc cbca cbcc cbce cbcl cbcu cbdb cbdc cbea cbec cbee cbef cbfb cbfc cblb cblc ccaa ccab ccac ccad ccaf ccba ccbc ccca cccb cccc cccf cccl cccu ccdc ccdf cced ccee ccel ccfa ccfc ccfd ccff ccfl ccla cclc ccuc cd-e cdaa cdac cdad cdba cdbf cdda cddb cddl cdec cdef cdfa cdfe ceac cead ceal ceba cebu cec- ceca cece ceda cedd cede cedu ceeb ceec ceel cef- cefa cefc cel- cela celc cele celf cell cfaa cfab cfac cfae cfbc cfca cfcb cfcf cfcl cfda cffb clab clad claf clau clcd cldc clea clec cled clee clef cleu club clud clue cuau cub- cuba cubb cube cuca cucc cuce cuda cude cued cufa cufc cuff cula culb culc culd cule cull daab daad daae daal daau daba dabb dabu daca dace dada dade dadu daeb daeu dafa dafc dafe daff dala dale dalf dall dalu daub daud daue dbcc dbfc dcbc dcca dccb dccc dccl dccu dcdb dcfc dddd ddlc ddub deac dead deae deaf deal deau deba debe debu dec- deca decc decd dece decl deda dedd dede dedu deeb deed deef deel defe deff dela deld dele delf dell deua deue deul dfaf dfcc dfcu dffa dlab dlbd duaa duab duad dual dub- duba dubb dubc dube dubu duca duce duda dudd dude dudu duel dufc duff dufu dula dulc dule dull dulu duul e-cl e-la eaaf eaba eaca eacc eada eadb eadd eaec eafb eala ealc eald eale ebac ebal ebba ebbc ebcc ebed ebel ebfc ebla ebul ecaa ecac ecad ecal ecbc ecbe ecca eccb eccc ecce eccl ecdc ecdf ecdl eced ecef ecfa ecfc ecla ecua edac edad edca edda eddc edde ede- edea edel edfa edfl edfu edla edle educ eeca eede eedu eeea eeee eefa eefe eefl eele efab efca efda effa efla efua el-b elab elac elad elal elba elbe elbu elca elcb elce elda elde elea elec eled elee elef elfa elfc elfe ella elle ellu elue elul euba eubc eucd eude eufc eula eule faaa faac faad faba fabd fabe fabu faca facc face fada fadd fade faeb fafa fafc fafe faff fala falc fald fale fall falu faud faue faul fbla fble fcab fcal fcba fcca fccf fcda fdca fead feaf feal feba fece feda fede feeb feed feel fefc fefe feff fela feld fele felf fell feud ffcc ffee ffff flab flac flad flae flcl flea fled flee flub flud flue fluf fuad fubb fubu fuc- fuca fuda fudd fude fuel fufc fuff fufu fula fule full fulu laaa laac laad laal laba labe labu laca lacc lace lacl lacu lada ladd lade ladu lael lafb lafc lafe laff lala lald lale lall lalu laub laud laue lauf laul lbcc lcac lcad lcbc lcca lccc lcce lcdd lcfc ldcf le-u leaa lead leaf leal leau leba lebd lebu leca lece leda lede leea leed leef leel lefa lefe leff lela lele lell lelu leuc leud lfca lfcc llcc lldb lldc llef lleu lllc llll llud luau luba lube luca luce luda ludd lude lued luef lufe luff lufu lula lule lull lulu luua uabc uaca uafa uald uaua ubac ubal ubba ubbe ubla uble ubud ucad ucal ucbc ucca ucdc ucdd ucea ucel ucfa ucfb ucla ucua udaa udad udal udau udbc udca udea udel ueba ueda uefa uele uell ufcu ufel uffa uffe ulaa ulad ulae ulbc ulcc ulde ulea uleb ulee ulfe ulla ulle ulua ulul uulu uuuu