-er a-a a-b aaa aab aae aaf aak aar aas ab- aba abb abe abf abk abr abs aea aeb aee aef aek aer aes af- afa afb afe aff afk afr afs aka akb ake akk akr aks ar- ara arb are arf ark arr ars as- asa asb ase asf ask asr ass baa bab bae baf bak bar bas bba bbb bbe bbf bbk bbr bbs be- bea beb bee bef bek ber bes bfa bfb bfe bff bfr bfs bka bkb bke bkf bkk bkr bks bra brb bre brf brk brr brs bsa bsb bse bsf bsk bsr bss eaa eab eae eaf eak ear eas eba ebb ebe ebf ebk ebr ebs eea eeb eee eef eek eer ees ef- efa efb efe eff efr efs eka ekb eke ekf ekr eks era erb ere erf erk err ers es- esa esb ese esf esk esr ess faa fab fae faf fak far fas fba fbb fbe fbf fbk fbr fbs fea feb fee fef fek fer fes ffa ffe fff ffk ffr ffs fka fkb fkf fkk fra frb fre frf frk frr frs fsa fsb fse fsf fsk fsr fss ka- kaa kab kae kaf kak kar kas kba kbb kbe kbf kbk kbr kbs ke- kea keb kee kef kek ker kes kfa kff kfs kkb kke kkk kkr kks kra krf krk krr krs ksa ksb kse ksf ksk ksr kss ra- raa rab rae raf rak rar ras rba rbb rbe rbf rbk rbr rbs re- rea reb ree ref rek rer res rfa rfb rfe rff rfk rfr rfs rkb rke rkf rkk rks rra rrb rrf rrk rrr rrs rsa rsb rse rsf rsk rsr rss saa sab sae saf sak sar sas sba sbb sbe sbf sbk sbr sbs se- sea seb see sef sek ser ses sfa sfb sfe sff sfk sfr sfs sk- ska skb ske skf skk skr sks sr- sra srb sre srf srk srr srs ss- ssa ssb sse ssf ssk ssr sss

-ase a-ak a-be aaaa aaab aaae aaaf aaar aaas aaba aabb aaea aaes aafa aafb aaff aaka aake aara aare aars aasa aase aasf aass abaa abab abae abaf abak abar abas abb- abba abbb abbe abbr abbs abee aber abes abff abra abrs abs- absa abse absf abss aeaf aeas aebs aeer aeka aer- aera aers aess afaa afak afar afbs afee afek afer afes affa affs afka afkr afr- afra afre afrs afsa afsb akaa akae akar akas akee aker akes akka akr- akra akre aksa arab arae araf arak arar aras arba arbe arbs area aree aref arek ares arfa arfb arff arfs arka arke arks arr- arra arre arrk arrr arrs ars- arsa arse arsk asaa asab asae asaf asak asar asas asba asea asee asek aser ases asfa aska aske askr asks asra asrs assa asse assk assr asss baaa baaf baak baar baas baba babb babe babr babs baek baer baes baff bak- baka bake bakr baks bar- bara barb bare barf bark barr bars basa base basf bask bass bbas bbbb bbbs bbeb beaf beak bear beas beba bebb bebe beeb beef beek beer bees befa befe beff beka beke beks bera bere berk berr bers bes- besa bese besk bess bfas bffs bfsr brab brae braf brak bras brea breb bree bref brek brer bres brka brkb brrr brrs brsb brsr bsaa bsas bsea bseb bsee bser bses bsfa bsff bsfs bsra bsse eaaf eaba eafb eara earb eare ears easa ease ebba ebbr ebbs eber ebes ebsa eeea eeee eees eefa eefe eeka eeke eeks eera eers eese eesk efab efas efbr efes effa effs efke efsa eka- ekab ekeb ekek eker ekes ekka eraf eras erba erbb erbe ereb erer eres erfs erke erks erra erre errs ersa erse esab esar esas esba esbs esea esee esek eser eses esfs eska eske esks esra essa esse f--k faaa faas faba fabe fabs faeb faes fafa fafe faff fake fara farb fare fark farr fars fasa fase fass fbar fbrs feaf feak fear feas feba febs feeb feek feer fees fefe feff feke fera ferb fere ferk ferr fers fesa fese fess ffar ffee ffff ffrr ffsa ffss fkab frab frae frak fras frea free fres frsb fsas fsra fssa fssf kaaa kaab kaaf kaak kaar kaas kaba kabb kabe kabf kabr kaer kaes kafa kafe kaff kafr kafs kaka kake kakk kaks kara karb kare karf kark karr kars kas- kasa kasb kase kasf kask kasr kass kbaa kbab kbae kbak kbar kbas kbba kbbb kbbe kbbf kbbk kbbr kbbs kbeb kbee kbef kbek kber kbes kbfb kbff kbfk kbfr kbfs kbkb kbkf kbkk kbkr kbra kbrb kbre kbrf kbrk kbsa kbsb kbsk kbsr kbss kea- keak kear keas keba kebb kebe kebr keef keek keer kees kefa kefb keff kefr kefs keka kekb keke keks ker- kera kerb kere kerf kerk kerr kers kesa kesb kesk kesr kess kfab kfar kfbk kfeb kfer kffa kffb kfff kffk kfka kfkb kfra kfre kfrr kfrs kfsa kfse kfsk kfsr kkaa kkar kkba kkbb kkbe kkbr kkbs kkea kkfr kkfs kkkk kkrb kkre kkrf kkrk kkrr kkrs kksa kkse kksf kksr kkss krab krae krak krar kras krba krbb krbe krbk krbr krea kreb kree kref krek kres krfe krff krfs krka krke krkk krkr krks krrb krre krrf krrk krrr krrs krsa krse krsf krsk krsr krss ksab ksaf ksak ksar ksas ksba ksbr ksbs ksea ksee ksek kser ksfa ksfb ksfe ksfr kska kskb kske kskf kskk kskr ksks ksra ksrb ksrf ksrr ksrs kssa ksse kssr ksss raab raaf raak raas raba rabb rabe rabk rabs raef raer raes rafa rafe raff raka rake rakk rara rarb rare rarf rark rars rasa rase rask rass rbaf rbbb rbbr rbbs rbss rea- reae reaf reak rear reas reba rebb rebe rebk rebs reeb reef reek rees refe reff refr refs reka reke reks rera rere rers resa rese