-er a-a a-b a-c a-t aaa aab aac aae aar aas aat ab- aba abb abc abe abr abs abt ac- aca acb acc ace acr acs act aea aeb aec aee aer aes aet ar- ara arb arc are arr ars art as- asa asb asc ase asr ass ast at- ata atb atc ate atr ats att baa bab bac bae bar bas bat bba bbb bbc bbe bbr bbs bbt bca bcb bcc bce bcr bcs bct be- bea beb bec bee ber bes bet bra brb bre brr brs brt bsa bsb bsc bse bsr bss bst bta btb btc bte btr bts btt c-- caa cab cac cae car cas cat cba cbb cbc cbe cbr cbs cbt cca ccb ccc cce ccr ccs cct ce- cea ceb cec cee cer ces cet cra crb crc cre crr crs crt csa csb csc cse csr css cst cta ctb ctc cte ctr cts ctt eaa eab eac eae ear eas eat eba ebb ebc ebe ebr ebs ebt ec- eca ecb ecc ece ecr ecs ect eea eeb eec eee eer ees eet era erb erc ere err ers ert es- esa esb esc ese esr ess est eta etb etc ete etr ets ett ra- raa rab rac rae rar ras rat rba rbb rbc rbe rbr rbs rbt rca rcb rcc rce rcr rcs rct re- rea reb rec ree rer res ret rra rrb rrc rrr rrs rrt rsa rsb rsc rse rsr rss rst rta rtb rtc rte rtr rts rtt saa sab sac sae sar sas sat sba sbb sbc sbe sbr sbs sbt sca scb scc sce scr scs sct se- sea seb sec see ser ses set sr- sra srb src sre srr srs srt ss- ssa ssb ssc sse ssr sss sst sta stb stc ste str sts stt taa tab tac tae tar tas tat tba tbb tbc tbe tbr tbs tbt tca tcb tcc tce tcr tcs tct te- tea teb tec tee ter tes tet tra trb trc tre trr trs trt tsa tsb tsc tse tsr tss tst tta ttb ttc tte ttr tts ttt

-ase a-be aaaa aaab aaac aaae aaar aaas aaba aabb aabc aabt aaca aacb aacc aace aacr aacs aact aaea aaec aaes aara aarc aare aars aart aasa aasc aase aass aast aata aatc aatt abaa abab abac abae abar abas abat abb- abba abbb abbe abbr abbs abbt abca abcb abcc abcr abcs abct abec abee aber abes abet abra abrc abrs abs- absa abse abss abta abts ac-t acaa acab acac acae acar acas acat acba acca accc acce accs acct ace- acea acec acer aces acet acr- acra acrc acre acrr acrs acsa acsc acse acss acst acta actc acte acts actt aeac aeas aebs aecb aect aeer aer- aera aerc aers aesc aess aest aeta aetc aetr aett arab arac arae arar aras arat arba arbe arbs arc- arca arce arcs arct area arec aree ares aret arr- arra arrc arre arrr arrs arrt ars- arsa arsc arse arst arta artc arte artr arts asaa asab asac asae asar asas asat asba asc- asca ascb ascc asce ascr asct asea asec asee aser ases aset asra asrc asrs assa assc asse assr asss asst asta astb astc aste astr asts at-t ataa atab atac atae atar atas atat atbs atca atcc atcr atcs atea atec atee ater ates atra atrc atre atsb atsc atse atst atta atte attr atts baaa baar baas baat baba babb babe babr babs bac- baca bacc bace bacs bact baer baes bar- bara barb barc bare barr bars bart basa basc base bass bast bata batc bate bats batt bbas bbbb bbbs bbeb bbet bbrc bcaa bcar bcas bcat bcbc bcbs bcca bccc bccs bcec bcer bces bcet bcra bcrs bcsa bcsc bcss bctc bcts bear beas beat beba bebb bebe beca becs beeb beer bees beet bera berc bere berr bers bert bes- besa bese bess best beta betc bete bets bett brab brac brae bras brat brca brcb brce brea breb brec bree brer bres bret brrr brrs brsb brsr brst brtc bsaa bsac bsas bsat bscs bsea bseb bsec bsee bser bses bset bsra bssc bsse bsts btaa btcc btcs btec btrc btrt btss bttb caaa caab caac caas caat caba cabe cabs cac- caca cacc cace cacr caec caer caes cara carb carc care carr cars cart casa casb casc case casr cass cast cat- cata catb catc cate cats catt cbac cbar cbat cbbc cbbs cbca cbcc cbce cbcr cbcs cbct cbea cbec cbee cber cbet cbre cbrt cbsa cbsc cbse cbta cbtc ccaa ccab ccac ccar ccas ccat ccba ccbc ccca cccb cccc cccs ccee ccra ccrc ccre ccrs ccrt ccsa ccss ccst cctb cctc cctt ceac cear ceas ceat ceba cebs cec- ceca cece cecs cect ceeb ceec cees cer- cera cerc cere cers cert cesa cesc cese cesr cess cest cet- ceta cete cets crab crac crar cras crat crbc crca crcc crce crcr cre- crea creb crec cree cres cret crrt crsa crss crst crtc crts csaa csab csac csar csas csat cscb cscc csce cscr cscs csea csec csee cser cset csra csrc csrs cssa csse cssr csta cstc cstr csts ctab ctae ctba ctbs ctca ctec ctrc ctrs ctsa ctsc ctss ctta ctts eaba eaca eacc eaec eara earb eare ears eart easa ease east eata eate eats ebac ebba ebbc ebbr ebbs ebcc eber ebes ebsa ecaa ecac ecar ecat ecbc ecbe ecca eccb eccc ecce ecct eces ecra ecrc ecrr ecsa ecsc ecse ecss ect- ecta ectc ects eeca eecs eeea eeee eees eera eerc eers eese eeta eetc eete eets eras erat erba erbb erbe erca ercc erce ereb erec erer eres eret erra errc erre errs ersa erse erst erta erts esab esac esar esas esat esba esbs esca escb esce escr escs esea esee eser eses eset esra essa esse esst esta estc