-er a-a a-b aaa aab aae aag aak aar aas ab- aba abb abe abg abk abr abs aea aeb aee aeg aek aer aes ag- aga agb age agg agk agr ags aka akb ake akg akk akr aks ar- ara arb are arg ark arr ars as- asa asb ase asg ask asr ass baa bab bae bag bak bar bas bba bbb bbe bbg bbk bbr bbs be- bea beb bee beg bek ber bes bga bgb bge bgg bgk bgr bgs bka bkb bke bkg bkk bkr bks bra brb bre brg brk brr brs bsa bsb bse bsg bsk bsr bss eaa eab eae eag eak ear eas eba ebb ebe ebg ebk ebr ebs eea eeb eee eeg eek eer ees ega egb ege egg egr egs eka ekb eke ekg ekr eks era erb ere erg erk err ers es- esa esb ese esg esk esr ess gaa gab gae gag gak gar gas gba gbe gbg gbk gbr gbs ge- gea geb gee geg gek ger ges gga ggb ggg ggr ggs gka gkb gks gra grb gre grg grk grr grs gsa gsb gse gsg gsk gsr gss ka- kaa kab kae kag kak kar kas kba kbb kbe kbk kbr kbs ke- kea keb kee keg kek ker kes kga kgb kgs kkb kke kkk kkr kks kra krg krk krr krs ksa ksb kse ksg ksk ksr kss ra- raa rab rae rag rak rar ras rba rbb rbe rbg rbk rbr rbs re- rea reb ree reg rek rer res rga rgb rge rgg rgk rgr rgs rkb rke rkg rkk rks rra rrb rrg rrk rrr rrs rsa rsb rse rsg rsk rsr rss saa sab sae sag sak sar sas sba sbb sbe sbg sbk sbr sbs se- sea seb see seg sek ser ses sga sgb sge sgg sgk sgr sgs sk- ska skb ske skg skk skr sks sr- sra srb sre srg srk srr srs ss- ssa ssb sse ssg ssk ssr sss

-ase a-ak a-be aaaa aaab aaae aaar aaas aaba aabb aaea aaes aage aaka aake aara aare aars aasa aase aass abaa abab abae abag abak abar abas abb- abba abbb abbe abbr abbs abee aber abes abra abrs abs- absa abse abss aeas aebs aeer aega aeka aer- aera aers aess agag agar agas agba agea agee ager ages agga agge agra agre agsa agsg akaa akae akar akas akee akeg aker akes akka akr- akra akre aksa arab arae arag arak arar aras arba arbe arbs area aree areg arek ares arga argb arge args arka arke arks arr- arra arre arrg arrk arrr arrs ars- arsa arse arsk asaa asab asae asag asak asar asas asba asea asee asek aser ases asge aska aske askr asks asra asrg asrs assa asse assk assr asss baaa baak baar baas baba babb babe babr babs baek baer baes baga bage bagg bags bak- baka bake bakr baks bar- bara barb bare barg bark barr bars basa base bask bass bbas bbbb bbbs bbeb bbga bbrg beag beak bear beas beba bebb bebe beeb beeg beek beer bees bega begg begs beka beke beks bera bere berg berk berr bers bes- besa bese besk bess bggs brab brae brag brak bras brea breb bree breg brek brer bres brka brkb brrr brrs brsb brsr bsaa bsas bsea bseb bsee bseg bser bses bsgs bsra bsse eaba eaga eage eara earb eare ears easa ease ebba ebbr ebbs eber ebes ebsa eeea eeee eees eega eegs eeka eeke eeks eera eerg eers eese eesk egaa egae egar egas egba egbe egea egee eger eggb egge eggs egks egra egre egss eka- ekab ekeb ekek eker ekes ekgs ekka eras erba erbb erbe ereb erer eres erg- erga ergg ergs erke erks erra erre errs ersa erse esab esag esar esas esba esbs esea esee esek eser eses eska eske esks esra essa esse essg gaar gaas gaba gabb gabe gabr gabs gaea gaer gaes gaga gage gagg gags gara garb gare garg garr gars gasa gasb gase gask gasr gass gbag gbas gbbs geab gear geas geba gebe geek geer gees gege gegg gera gerb gere gers gesg gesk gess gggg ggss grab grae gras grbr grea greb gree greg gres grrr grrs grss gsab gsea gskb gsse kaaa kaab kaag kaak kaar kaas kaba kabb kabe kabg kabr kaer kaes kag- kaga kagb kage kagg kagr kags kaka kake kakk kaks kara karb kare karg kark karr kars kas- kasa kasb kase kask kasr kass kbaa kbab kbae kbak kbar kbas kbba kbbb kbbe kbbg kbbk kbbr kbbs kbeb kbee kbek kber kbes kbga kbgb kbge kbgg kbgr kbkb kbkg kbkk kbkr kbra kbrb kbre kbrg kbrk kbsa kbsb kbsg kbsk kbsr kbss kea- keag keak kear keas keba kebb kebe kebr keek keer kees kega kege kegg kegk kegr kegs keka kekb keke keks ker- kera kerb kere kerk kerr kers kesa kesb kesk kesr kess kgab kgak kgas kgba kgbb kgbr kgeb kgga kggg kggr kgks kgra kgrb kgre kgrg kgrk kgrr kgrs kgsr kkaa kkag kkar kkba kkbb kkbe kkbg kkbr kkbs kkea kkeg kkgb kkgr kkkk kkrb kkre kkrk kkrr kkrs kksa kkse kksr kkss krab krae krag krak krar kras krba krbb krbe krbg krbk krbr krea kreb kree krek kres krgs krka krke krkk krkr krks krrb krre krrg krrk krrr krrs krsa krse krsk krsr krss ksab ksak ksar ksas ksba ksbr ksbs ksea ksee kseg ksek kser ksgg ksgr kska kskb kske kskg kskk kskr ksks ksra ksrb ksrg ksrr ksrs kssa ksse kssr ksss raab raag raak raas raba rabb rabe rabk rabs raeg raer raes raga rage ragg rags raka rake rakk rara rarb rare rark rars rasa rase rask rass rbbb rbbr rbbs rbss rea- reae reak rear reas reba rebb rebe rebk rebs reeb reek rees rega rege regr regs reka reke reks rera rere rerg rers resa