-er a-a a-b a-c a-t aaa aab aac aae aam aar aas aat ab- aba abb abc abe abm abr abs abt ac- aca acb acc ace acm acr acs act aea aeb aec aee aem aer aes aet ama amb amc ame amm amr ams amt ar- ara arb arc are arm arr ars art as- asa asb asc ase asm asr ass ast at- ata atb atc ate atm atr ats att baa bab bac bae bam bar bas bat bba bbb bbc bbe bbm bbr bbs bbt bca bcb bcc bce bcm bcr bcs bct be- bea beb bec bee bem ber bes bet bma bmb bmc bme bmm bmr bms bmt bra brb bre brm brr brs brt bsa bsb bsc bse bsm bsr bss bst bta btb btc bte btm btr bts btt c-- caa cab cac cae cam car cas cat cba cbb cbc cbe cbm cbr cbs cbt cca ccb ccc cce ccm ccr ccs cct ce- cea ceb cec cee cem cer ces cet cma cmb cmc cme cmm cmr cms cmt cra crb crc cre crm crr crs crt csa csb csc cse csm csr css cst cta ctb ctc cte ctm ctr cts ctt eaa eab eac eae eam ear eas eat eba ebb ebc ebe ebm ebr ebs ebt ec- eca ecb ecc ece ecm ecr ecs ect eea eeb eec eee eem eer ees eet em- ema emb emc eme emm emr ems emt era erb erc ere erm err ers ert es- esa esb esc ese esm esr ess est eta etb etc ete etm etr ets ett m-r maa mab mac mae mam mar mas mat mba mbb mbc mbe mbm mbr mbs mbt mc- mca mcb mcc mce mcm mcr mcs mct mea meb mec mee mem mer mes met mma mmb mmc mme mmm mmr mms mmt mra mrb mrc mre mrm mrr mrs mrt msa msb msc mse msm msr mss mst mta mtb mtc mte mtm mtr mts mtt ra- raa rab rac rae ram rar ras rat rba rbb rbc rbe rbm rbr rbs rbt rca rcb rcc rce rcm rcr rcs rct re- rea reb rec ree rem rer res ret rma rmb rmc rme rmm rmr rms rmt rra rrb rrc rrm rrr rrs rrt rsa rsb rsc rse rsm rsr rss rst rta rtb rtc rte rtm rtr rts rtt saa sab sac sae sam sar sas sat sba sbb sbc sbe sbm sbr sbs sbt sca scb scc sce scm scr scs sct se- sea seb sec see sem ser ses set sma smb smc sme smm smr sms smt sr- sra srb src sre srm srr srs srt ss- ssa ssb ssc sse ssm ssr sss sst sta stb stc ste stm str sts stt taa tab tac tae tam tar tas tat tba tbb tbc tbe tbm tbr tbs tbt tca tcb tcc tce tcm tcr tcs tct te- tea teb tec tee tem ter tes tet tma tmb tmc tme tmm tmr tms tmt tra trb trc tre trm trr trs trt tsa tsb tsc tse tsm tsr tss tst tta ttb ttc tte ttm ttr tts ttt

-ase a-be aaaa aaab aaac aaae aaam aaar aaas aaba aabb aabc aabm aabt aaca aacb aacc aace aacm aacr aacs aact aaea aaec aaem aaes aama aamb aamc aame aamr aams aara aarc aare aarm aars aart aasa aasc aase aasm aass aast aata aatc aatt abaa abab abac abae abam abar abas abat abb- abba abbb abbe abbr abbs abbt abca abcb abcc abcr abcs abct abec abee aber abes abet abma abmb abmc abms abmt abra abrc abrs abs- absa abse abss abta abts ac-t acaa acab acac acae acar acas acat acba acca accc acce accm accs acct ace- acea acec acem acer aces acet acma acmc acme acms acr- acra acrc acre acrm acrr acrs acsa acsc acse acsm acss acst acta actc acte acts actt aeac aeas aebs aecb aect aeer aemt aer- aera aerc aers aesc aess aest aeta aetc aetr aett amaa amac amae amam amar amas amat amb- amba ambe ambr ambs amca amcc amcs amec amee amer ames amet amm- amma amme amra amrc amsa amsc amss amst amta amtc amte amts arab arac arae aram arar aras arat arba arbe arbs arc- arca arce arcm arcs arct area arec aree arem ares aret arma armc arme armm arms armt arr- arra arrc arre arrr arrs arrt ars- arsa arsc arse arst arta artc arte artr arts asaa asab asac asae asam asar asas asat asba asbm asc- asca ascb ascc asce ascr asct asea asec asee asem aser ases aset asma asme asmm asmr asms asmt asra asrc asrm asrs assa assc asse assr asss asst asta astb astc aste astm astr asts at-t ataa atab atac atae atar atas atat atbs atca atcc atcr atcs atea atec atee atem ater ates atm- atma atme atms atra atrc atre atrm atsb atsc atse atst atta atte attr atts baaa baam baar baas baat baba babb babe babm babr babs bac- baca bacc bace bacs bact baer baes bama bamb bamc bame bamm bams bar- bara barb barc bare barm barr bars bart basa basc base bass bast bata batc bate bats batt bbas bbbb bbbs bbcm bbeb bbet bbrc bcaa bcam bcar bcas bcat bcbc bcbs bcca bccc bccm bccs bcec bcer bces bcet bcma bcms bcra bcrs bcsa bcsc bcsm bcss bctc bcts beam bear beas beat beba bebb bebe beca becs beeb beem beer bees beet bema beme bera berc bere berm berr bers bert bes- besa bese besm bess best beta betc bete bets bett bmaa bmce bmtc bmts brab brac brae bram bras brat brca brcb brce brea breb brec bree brem brer bres bret brmc brrm brrr brrs brsb brsr brst brtc bsaa bsac bsam bsas bsat bscs bsea bseb bsec bsee bser bses bset bsms bsmt bsra bsrm bssc