-ase a-ak a-be aaaa aaab aaac aaae aaaf aaar aaas aaba aabb aabc aaca aacb aacc aace aacf aack aacr aacs aaea aaec aaes aafa aafb aafc aaff aaka aake aara aarc aare aars aasa aasc aase aasf aass abaa abab abac abae abaf abak abar abas 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 acaa acab acac acae acar acas acba acca accc acce accf accs ace- acea acec acek acer aces acfc acfe acfs acke acks acr- acra acrc acre acrr acrs acsa acsc acse acss aeac aeaf aeas aebs aecb aeer aeka aer- aera aerc aers aesc aess afaa afak afar afbs afca afcb afcc afcs afee afek afer afes affa affc affs afka afkr afr- afra afrc afre afrs afsa afsb afsc akaa akae akar akas akca akee aker akes akka akr- akra akre aksa arab arac arae araf arak arar aras arba arbe arbs arc- arca arce arcs area arec aree aref arek ares arfa arfb arfc arff arfs arka arke arks arr- arra arrc arre arrk arrr arrs ars- arsa arsc arse arsk asaa asab asac asae asaf asak asar asas asba asc- asca ascb ascc asce ascr asea asec asee asek aser ases asfa aska aske askr asks asra asrc asrs assa assc asse assk assr asss baaa baaf baak baar baas baba babb babe babr babs bac- baca bacc bace back bacs baek baer baes bafc baff bak- baka bake bakr baks bar- bara barb barc bare barf bark barr bars basa basc base basf bask bass bbas bbbb bbbs bbeb bbfc bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcec bcer bces bcfc bcra bcrs bcsa bcsc bcss beaf beak bear beas beba bebb bebe beca beck becs beeb beef beek beer bees befa befe beff beka beke beks bera berc bere berk berr bers bes- besa bese besk bess bfas bfca bfcs bffs bfsr brab brac brae braf brak bras brca brcb brce brea breb brec bree bref brek brer bres brfc brka brkb brrr brrs brsb brsr bsaa bsac bsas bscs bsea bseb bsec bsee bser bses bsfa bsfc bsff bsfs bsra bssc bsse caaa caab caac caaf caas caba cabe cabf cabs cac- caca cacc cace cack cacr caec caer caes cafa cafb cafc cafe caff cafs caka cake cara carb carc care carf cark carr cars casa casb casc case cask casr cass cbac cbar cbbc cbbs cbca cbcc cbce cbcr cbcs cbea cbec cbee cbef cber cbfb cbfc cbka cbkr cbre cbsa cbsc cbse ccaa ccab ccac ccaf ccar ccas ccba ccbc ccca cccb cccc cccf cccs ccee ccfa ccfc ccff ccra ccrc ccre ccrf ccrs ccsa ccsf ccss ceac cear ceas ceba cebs cec- ceca cece cecs ceeb ceec cees cef- cefa cefc ceke 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 ckac ckbc ckbe ckck ckcs cker ckfr ckrc cksa cksb crab crac craf crar cras crbc crca crcc crce crcr cre- crea creb crec cree cres crfc crfs crkc crsa crss csaa csab csac csak csar csas csbf cscb cscc csce cscf cscr cscs csea csec csee cser csfc csfr cska csks csra csrc csrs cssa csse cssr eaaf eaba eaca eacc eaec eafb eara earb eare ears easa ease ebac ebba ebbc ebbr ebbs ebcc eber ebes ebfc ebsa ecaa ecac ecar ecbc ecbe ecca eccb eccc ecce ecef eces ecfa ecfc ecfr ecfs ecka ecks ecra ecrc ecrf ecrr ecsa ecsc ecse ecss eeca eecs eeea eeee eees eefa eefe eeka eeke eeks eera eerc eers eese eesk efab efas efbr efca efes effa effs efke efsa eka- ekab ekeb ekek eker ekes ekfc ekka eraf eras erba erbb erbe erca ercc erce ereb erec erer eres erfc erfs erke erks erra errc erre errs ersa erse esab esac esar esas esba esbs esca escb esce escr escs esea esee esek eser eses esfs eska eske esks esra essa esse f--k faaa faac faas faba fabe fabs faca facc face fack facs faeb faes fafa fafc fafe faff fake fara farb farc fare fark farr fars fasa fasc fase fass fbar fbrs fcab fcar fcas fcba fcbs fcca fccf fces fcra fcsc feaf feak fear feas feba febs fece feck feeb feek feer fees fefc fefe feff feke fera ferb ferc fere ferk ferr fers fesa fese fess ffar ffcc ffee ffff ffrr ffsa ffss fkab frab frac frae frak fras frbc frcc frea free fres frfc frsb frsc fsas fscb fscc fsck fsec fsra fssa fssc fssf kaaa kaab kaaf kaak kaar kaas kaba kabb kabc kabe kabf kabr kacb kacc kace kacs kaer kaes kafa kafc kafe kaff kafr kafs kaka kakc kake kakk kaks kara karb kare karf kark karr kars kas- kasa kasb kasc kase kasf kask kasr kass kbaa kbab kbac kbae kbak kbar kbas kbba kbbb kbbc kbbe kbbf kbbk kbbr kbbs kbca kbcb kbce kbck kbcr kbcs kbeb kbec kbee kbef kbek kber kbes kbfb kbfc kbff kbfk kbfr kbfs kbkb kbkf kbkk kbkr kbra kbrb kbrc kbre kbrf kbrk kbsa kbsb kbsk kbsr kbss kcaa kcab kcac kcar kcas kcba kcbc kcbf kcbk kcbr kcbs kcca kccb kccc kcck kccr kcea kceb kcec kcee kcfa kcfb kcfc kckc kckf kckk kckr kcrc kcrr kcrs kcsa kcsb kcsc kcse kcsf kcsr kcss kea- keak kear keas keba kebb kebc kebe kebr keca keck kecr keef keek keer kees kefa kefb kefc keff kefr kefs keka kekb kekc keke keks ker- kera kerb kerc kere kerf kerk kerr kers kesa kesb kesc kesk kesr kess kfab kfac kfar kfbc kfbk kfcf kfcr kfcs kfeb kfer kffa kffb kfff kffk kfka kfkb kfra kfrc kfre kfrr kfrs kfsa kfse kfsk kfsr kkaa kkac kkar kkba kkbb kkbe kkbr kkbs kkcb kkck kkcr kkcs kkea kkfr kkfs