a-be a-fu aaaa aaab aaac aaae aaaf aaar aaba aabb aabc aabt aaca aacb aacc aace aacf aacr aact aacu aaea aaec aafa aafb aafc aaff aara aarc aare aart aaru aata aatc aatf aatt abaa abab abac abae abaf abar abat abau abb- abba abbb abbe abbr abbt abca abcb abcc abcf abcr abct abec abee aber abet abff abra abrc abta abtu abua abue abuf abut ac-t acaa acab acac acae acar acat acba acca accc acce accf acct accu ace- acea acec acer acet acfc acfe acft acr- acra acrc acre acrr acta actc acte actf actt actu acu- acue acuf acur acut aeac aeaf aecb aect aeer aer- aera aerc aeta aetc aetf aetr aett afaa afar afat afca afcb afcc afcu afee afer afet affa affc afft afr- afra afrc afre afru afta aftc afte afua afue arab arac arae araf arar arat arau arba arbe arc- arca arce arct area arec aree aref aret areu arfa arfb arfc arff arft arfu arr- arra arrc arre arrr arrt arru arta artc arte artr arua arub arue arut at-t ataa atab atac atae atar atat atca atcc atcf atcr atea atec atee atef ater atfb atfc atfe atra atrc atre atru atta atte attr attu atua atub atuc atur auaa aube auca auce auct auer aufc aufe aur- aura aure aut- aute baaa baaf baar baat baba babb babe babr babu bac- baca bacc bace bact baer bafc baff baft bar- bara barb barc bare barf barr bart baru bata batc bate batf batt batu bau- bauf baur bbau bbbb bbeb bbet bbfc bbrc bcaa bcar bcat bcbc bcca bccc bcec bcer bcet bcfc bcra bcru bctc bcuc beaf bear beat beau beba bebb bebe beca becu beeb beef beer beet befa befe beff beft bera berc bere berr bert beru beta betc bete bett betu beur bfca bfta bftt brab brac brae braf brat brau brca brcb brce brea breb brec bree bref brer bret brfc brfu brrr brtc bruc brue brut btaa btaf btcc btec btfc btrc btrt bttb buar buat buba bubb bube bubu buca bucc buce bucu buea buer bueu bufc bufe buff bufr bur- bura burb bure burr burt buru but- buta bute butt caaa caab caac caaf caat caba cabe cabf cabu cac- caca cacc cace cacr caec caer caeu cafa cafb cafc cafe caff cafu cara carb carc care carf carr cart cat- cata catb catc cate catf catt catu cauc cauf caut cbac cbar cbat cbbc cbca cbcc cbce cbcr cbct cbcu cbea cbec cbee cbef cber cbet cbfb cbfc cbre cbrt cbta cbtc cbtf ccaa ccab ccac ccaf ccar ccat ccba ccbc ccca cccb cccc cccf cccu ccee ccfa ccfc ccff ccra ccrc ccre ccrf ccrt cctb cctc cctt ccuc ccut ceac cear ceat ceba cebu cec- ceca cece cect ceeb ceec cef- cefa cefc cer- cera cerc cere cerf cert cet- ceta cete cfaa cfab cfac cfae cfar cfbc cfbr cfbt cfca cfcb cfcf cffb cffr cfra cfrb cfre cfrt cfta cftc cfte cftr crab crac craf crar crat crau crbc crbu crca crcc crce crcr cre- crea creb crec cree cret creu crfc crrt crtc crtf crub crue crut ctab ctae ctba ctca ctcf ctec ctfc ctrc ctta cuau cub- cuba cubb cube cuca cucc cuce cuer cufa cufc cuff cura curb cure curf curr curt cut- cuta cutc cute cutt eaaf eaba eaca eacc eaec eafb eara earb eare eart eata eate ebac ebba ebbc ebbr ebcc eber ebfc ebru ebur ecaa ecac ecar ecat ecbc ecbe ecca eccb eccc ecce ecct ecef ecfa ecfc ecfr ecra ecrc ecrf ecrr ecru ect- ecta ectc ectf ecua eeca eeea eeee eefa eefe eera eerc eeta eetc eete eetu efab efbr efca efet effa eft- efta eftu efua eraf erat erau erba erbb erbe erca ercc erce ereb erec erer eret erfc erft erra errc erre erta ertu erua erub eruc erur etat etbc etbr etcc etec etee eter etfa etfb etfc etfe etra etre etta ette ettu etua euba eubc euer eufc eur- eura eurc eure eurt faaa faac faba fabe fabu faca facc face fact faeb fafa fafc fafe faff fara farb farc fare farr fart faru fata fatc fate fatf fatt faue faur faut fbar fcab fcar fcat fcba fcca fccf fcra feaf fear feat feba fece fect feeb feer feet fefc fefe feff fera ferb ferc fere ferr fert feru feta fete fetr fett fetu ffar ffcc ffee ffff ffrr fftf frab frac frae frat frau frbc frcc frea free fret frfc frta frub frue ft-c ftea fter ftfc ftub ftuc fuar fuat fubb fubu fuc- fuca fuct fuet fufc fuff fufu fur- fura fure furr furt futa fute futu raab raaf raat raba rabb rabe rabu rac- raca racc race ract racu raec raef raer rafa rafc rafe raff raft rara rarb rare rarf rata rate ratf ratt ratu raua raub rauc raue rauf raut rbaf rbbb rbbr rcac rcaf rcbc rccb rccc rcet rcfc rctc rea- reac reae reaf rear reat reau reba rebb rebe rebu reca recc rece recr rect recu reeb reef reet refe reff refr reft refu rera rere rert reru reta rete retr rett reue reuf reut reuu rfae rfef rffc rftc rrat rrfc rrrr rtbf rtca rtcc rtce rtee rtfb rtfc ruba rubb rube rubu ruca ruce ruct ruer ruet rufa rufc rufe ruff ruft rura rurc rure ruru ruta rute rutt rutu taa- taaf taar taat taba tabb tabc tabe tabu taca tacc tace tact taec taer tafa tafc tafe taff taft tara tarb tarc tare tarf tarr tart taru tata tatb tate tatr tatt tatu taua taub tauc taue taur taut tbaf tbar tbca tbcb tbcc tbce tbrb tbta tcca tccc tccu tcfc tctc teac tear teat teba tebu teca tecr tect teec teef teer teet tefc teff teft ter- tera terc tere terf terr teru teta tete tetr tett tetu teut tfae tfca tfcu tfeb tfec tftc traa trab trac trae traf