-er a-a a-b a-c aaa aab aac aae aaj aak aar aas ab- aba abb abc abe abj abk abr abs ac- aca acb acc ace acj ack acr acs aea aeb aec aee aej aek aer aes aja ajb ajc aje ajj ajk ajr ajs aka akb akc ake akj akk akr aks ar- ara arb arc are arj ark arr ars as- asa asb asc ase asj ask asr ass baa bab bac bae baj bak bar bas bba bbb bbc bbe bbk bbr bbs bca bcb bcc bce bcj bck bcr bcs be- bea beb bec bee bek ber bes bja bjc bjj bjk bjr bjs bka bkb bkc bke bkk bkr bks bra brb bre brj brk brr brs bsa bsb bsc bse bsj bsk bsr bss c-- c-j caa cab cac cae caj cak car cas cba cbb cbc cbe cbj cbk cbr cbs cca ccb ccc cce ccj cck ccr ccs ce- cea ceb cec cee cej cek cer ces cja cjb cjc cjk cjr cjs cka ckb ckc cks cra crb crc cre crj crk crr crs csa csb csc cse csj csk csr css eaa eab eac eae eaj eak ear eas eba ebb ebc ebe ebj ebk ebr ebs ec- eca ecb ecc ece ecj eck ecr ecs eea eeb eec eee eek eer ees eja ejc eka ekb ekc eke ekr eks era erb erc ere erk err ers es- esa esb esc ese esk esr ess jaa jab jac jae jaj jak jar jas jba jbc jbj jbk jbr jbs jca jcb jcc jce jck jcr jcs jea jeb jec jee jej jek jer jes jja jjb jjc jjj jjk jjr jjs jka jkb jkk jkr jks jra jrb jrc jrk jrr jrs jsa jsb jsc jse jsj jsk jsr jss ka- kaa kab kac kae kaj kak kar kas kba kbb kbc kbe kbk kbr kbs kca kcb kcc kce kck kcr kcs ke- kea keb kec kee kek ker kes kjb kjc kje kjr kjs kkb kkc kke kkk kkr kks kra krc krk krr krs ksa ksb ksc kse ksk ksr kss ra- raa rab rac rae raj rak rar ras rba rbb rbc rbe rbk rbr rbs rca rcb rcc rce rcj rcr rcs re- rea reb rec ree rek rer res rja rjc rjk rjr rkb rkc rke rkk rks rra rrb rrc rrk rrr rrs rsa rsb rsc rse rsj rsk rsr rss saa sab sac sae saj sak sar sas sba sbb sbc sbe sbj sbk sbr sbs sca scb scc sce scj sck scr scs se- sea seb sec see sej sek ser ses sja sjb sjc sje sjj sjk sjr sjs sk- ska skb skc ske skj skk skr sks sr- sra srb src sre srj srk srr srs ss- ssa ssb ssc sse ssj ssk ssr sss

-ase a-ak a-be aaaa aaab aaac aaae aaar aaas aaba aabb aabc aaca aacb aacc aace aack aacr aacs aaea aaec aaes aaka aake aara aarc aare aars aasa aasc aase aass abaa abab abac abae abaj abak abar abas abb- abba abbb abbe abbr abbs abca abcb abcc abcr abcs abec abee aber abes abjs abra abrc abrs abs- absa abse abss acaa acab acac acae acar acas acba acca accc acce accs ace- acea acec acek acer aces acke acks acr- acra acrc acre acrr acrs acsa acsc acse acss aeac aeas aebs aecb aeer aeka aer- aera aerc aers aesc aess ajab ajac ajak ajar ajas ajba ajee ajka ajss akaa akae akar akas akca akee aker akes akka akr- akra akre aksa arab arac arae arak arar aras arba arbe arbs arc- arca arce arcs area arec aree arek ares arja arje arka arke arks arr- arra arrc arre arrk arrr arrs ars- arsa arsc arse arsk asaa asab asac asae asak asar asas asba asc- asca ascb ascc asce ascj ascr asea asec asee asek aser ases asja aska aske askr asks asra asrc asrs assa assc asse assk assr asss baaa baak baar baas baba babb babe babr babs bac- baca bacc bace back bacs baek baer baes baja bajs bak- baka bake bakr baks bar- bara barb barc bare bark barr bars basa basc base bask bass bbas bbbb bbbs bbeb bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcec bcer bces bcra bcrs bcsa bcsc bcss beak bear beas beba bebb bebe beca beck becs beeb beej beek beer bees beja beka beke beks bera berc bere berk berr bers bes- besa bese besk bess bjcc bjec brab brac brae braj brak bras brca brcb brce brea breb brec bree brek brer bres brje brka brkb brrr brrs brsb brsr bsaa bsac bsas bscs bsea bseb bsec bsee bser bses bsra bssc bsse caaa caab caac caas caba cabe cabs cac- caca cacc cace cack cacr caec caer caes caja caka cake cara carb carc care carj cark carr cars casa casb casc case cask casr cass cbac cbar cbbc cbbs cbca cbcc cbce cbcr cbcs cbea cbec cbee cber cbka cbkj cbkr cbre cbrj cbsa cbsc cbse ccaa ccab ccac ccar ccas ccba ccbc ccca cccb cccc cccs ccee ccra ccrc ccre ccrs ccsa ccss ceac cear ceas ceba cebs cec- ceca cece cecs ceeb ceec cees ceja cejc ceke cer- cera cerc cere cers cesa cesc cese cesr cess cjar cjbc cjbk cjca cjcb cjcj cjcs cjrb cjrc cjrj cjrs cjsb cjss ckac ckbc ckbe ckck ckcs cker ckjr ckjs ckrc cksa cksb crab crac craj crar cras crbc crca crcc crce crcr cre- crea creb crec cree cres crkc crsa crss csaa csab csac csak csar csas cscb cscc csce cscr cscs csea csec csee cser cska csks csra csrc csrs cssa csse cssr eaba eaca eacc eaec eara earb eare ears easa ease ebac ebba ebbc ebbr ebbs ebcc eber ebes ebsa ecaa ecac ecar ecbc ecbe ecca eccb eccc ecce eces ecjs ecka ecks ecra ecrc ecrr ecsa