-ase a-be a-fu aaaa aaab aaac aaae aaaf aaar aaas aaba aabb aabc aaca aacb aacc aace aacf aacr aacs aacu aaea aaec aaes aafa aafb aafc aaff aara aarc aare aars aaru aasa aasc aase aasf aass aasu aaus abaa abab abac abae abaf abar abas abau abb- abba abbb abbe abbr abbs abca abcb abcc abcf abcr abcs abec abee aber abes abff abra abrc abrs abs- absa abse absf abss absu abua abue abuf abus acaa acab acac acae acar acas acba acca accc acce accf accs accu ace- acea acec acer aces acfc acfe acfs acr- acra acrc acre acrr acrs acsa acsc acse acss acu- acue acuf acur acus aeac aeaf aeas aebs aecb aeer aer- aera aerc aers aesc aess afaa afar afbs afca afcb afcc afcs afcu afee afer afes affa affc affs afr- afra afrc afre afrs afru afsa afsb afsc afua afue afus arab arac arae araf arar aras arau arba arbe arbs arc- arca arce arcs area arec aree aref ares areu arfa arfb arfc arff arfs arfu arr- arra arrc arre arrr arrs arru ars- arsa arsc arse arsu arua arub arue asaa asab asac asae asaf asar asas asau asba asbu asc- asca ascb ascc asce ascr asea asec asee aser ases asfa asra asrc asrs asru assa assc asse assr asss assu asub asue asur asus auaa aube auca auce auer aufc aufe aufs aur- aura aure ausa ause ausu baaa baaf baar baas baba babb babe babr babs babu bac- baca bacc bace bacs baer baes bafc baff bar- bara barb barc bare barf barr bars baru basa basc base basf bass basu bau- bauf baur bbas bbau bbbb bbbs bbeb bbfc bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcec bcer bces bcfc bcra bcrs bcru bcsa bcsc bcss bcuc beaf bear beas beau beba bebb bebe beca becs becu beeb beef beer bees befa befe beff bera berc bere berr bers beru bes- besa bese bess beur bfas bfca bfcs bffs bfsr brab brac brae braf bras brau brca brcb brce brea breb brec bree bref brer bres brfc brfu brrr brrs brsb brsr bruc brue brus bsaa bsac bsas bscs bsea bseb bsec bsee bser bses bsfa bsfc bsff bsfs bsra bssc bsse buar buba bubb bube bubs bubu buca bucc buce bucs bucu buea buer bueu bufc bufe buff bufr bur- bura burb bure burr burs buru busa busc buse buss busu buus caaa caab caac caaf caas caba cabe cabf cabs cabu cac- caca cacc cace cacr caec caer caes caeu cafa cafb cafc cafe caff cafs cafu cara carb carc care carf carr cars casa casb casc case casr cass casu cauc cauf caus cbac cbar cbbc cbbs cbca cbcc cbce cbcr cbcs cbcu cbea cbec cbee cbef cber cbfb cbfc cbre cbsa cbsc cbse cbus ccaa ccab ccac ccaf ccar ccas ccba ccbc ccca cccb cccc cccf cccs cccu ccee ccfa ccfc ccff ccra ccrc ccre ccrf ccrs ccsa ccsf ccss ccuc ccus ceac cear ceas ceba cebs cebu cec- ceca cece cecs ceeb ceec cees cef- cefa cefc cer- cera cerc cere cerf cers cesa cesc cese cesr cess cfaa cfab cfac cfae cfar cfbc cfbr cfbs cfca cfcb cfcf cfcs cffb cffr cfra cfrb cfre cfsa cfse crab crac craf crar cras crau crbc crbu crca crcc crce crcr cre- crea creb crec cree cres creu crfc crfs crsa crss crub crue crus csaa csab csac csar csas csbf cscb cscc csce cscf cscr cscs csea csec csee cser csfc csfr csra csrc csrs cssa csse cssr csua csuf csur csus cuau cub- cuba cubb cube cubs cuca cucc cuce cuer cues cufa cufc cuff cura curb cure curf curr curs cusa cusb cuss cusu eaaf eaba eaca eacc eaec eafb eara earb eare ears easa ease eaus ebac ebba ebbc ebbr ebbs ebcc eber ebes ebfc ebru ebsa ebur ebus ecaa ecac ecar ecbc ecbe ecca eccb eccc ecce ecef eces ecfa ecfc ecfr ecfs ecra ecrc ecrf ecrr ecru ecsa ecsc ecse ecss ecsu ecua ecus eeca eecs eeea eeee eees eefa eefe eera eerc eers eese efab efas efbr efca efes effa effs efsa efua eraf eras erau erba erbb erbe erca ercc erce ereb erec erer eres erfc erfs erra errc erre errs ersa erse erua erub eruc erur erus esab esac esar esas esau esba esbs esca escb esce escr escs escu esea esee eser eses esfs esra essa esse essu esuf esus euba eubc euer eufc eur- eura eurc eure eusa euse faaa faac faas faba fabe fabs fabu faca facc face facs faeb faes fafa fafc fafe faff fara farb farc fare farr fars faru fasa fasc fase fass faue faur fbar fbrs fbus fcab fcar fcas fcba fcbs fcca fccf fces fcra fcsc feaf fear feas feba febs fece feeb feer fees fefc fefe feff fera ferb ferc fere ferr fers feru fesa fese fess feus ffar ffcc ffee ffff ffrr ffsa ffss frab frac frae fras frau frbc frcc frea free fres frfc frsb frsc frub frue fsas fscb fscc fsec fsra fssa fssc fssf fuar fubb fubs fubu fuc- fuca fufc fuff fufu fur- fura fure furr furs fusa fusc fuse fuss fusu raab raaf raas raba rabb rabe rabs rabu rac- raca racc race racs racu raec raef raer raes rafa rafc rafe raff rara rarb rare rarf rars rasa rasc rase rass rasu raua raub rauc raue rauf raus rbaf rbbb rbbr rbbs rbss rcac rcaf rcas rcbc rccb rccc rccs rcfc rcsa rcsc rcss rea- reac reae reaf rear reas reau reba rebb rebe rebs rebu reca recc rece recr recs recu reeb reef rees refe reff refr refs refu rera rere rers reru resa rese ress reue reuf reus reuu rfae rfef rffc rras rrfc rrrr rsaa rsaf rscc rscs rsee rsfc rsre rssa rsua ruas ruba rubb rube rubs rubu ruca ruce ruer rues rufa rufc rufe ruff rura rurc rure