-er a-a a-b a-c a-t aaa aab aac aae aam aar aat ab- aba abb abc abe abm abr abt ac- aca acb acc ace acm acr act aea aeb aec aee aem aer aet ama amb amc ame amm amr amt ar- ara arb arc are arm arr art at- ata atb atc ate atm atr att baa bab bac bae bam bar bat bba bbb bbc bbe bbm bbr bbt bca bcb bcc bce bcm bcr bct be- bea beb bec bee bem ber bet bma bmb bmc bme bmm bmr bmt bra brb bre brm brr brt bta btb btc bte btm btr btt c-- caa cab cac cae cam car cat cba cbb cbc cbe cbm cbr cbt cca ccb ccc cce ccm ccr cct ce- cea ceb cec cee cem cer cet cma cmb cmc cme cmm cmr cmt cra crb crc cre crm crr crt cta ctb ctc cte ctm ctr ctt eaa eab eac eae eam ear eat eba ebb ebc ebe ebm ebr ebt ec- eca ecb ecc ece ecm ecr ect eea eeb eec eee eem eer eet em- ema emb emc eme emm emr emt era erb erc ere erm err ert eta etb etc ete etm etr ett m-r maa mab mac mae mam mar mat mba mbb mbc mbe mbm mbr mbt mc- mca mcb mcc mce mcm mcr mct mea meb mec mee mem mer met mma mmb mmc mme mmm mmr mmt mra mrb mrc mre mrm mrr mrt mta mtb mtc mte mtm mtr mtt ra- raa rab rac rae ram rar rat rba rbb rbc rbe rbm rbr rbt rca rcb rcc rce rcm rcr rct re- rea reb rec ree rem rer ret rma rmb rmc rme rmm rmr rmt rra rrb rrc rrm rrr rrt rta rtb rtc rte rtm rtr rtt taa tab tac tae tam tar tat tba tbb tbc tbe tbm tbr tbt tca tcb tcc tce tcm tcr tct te- tea teb tec tee tem ter tet tma tmb tmc tme tmm tmr tmt tra trb trc tre trm trr trt tta ttb ttc tte ttm ttr ttt

a-be aaaa aaab aaac aaae aaam aaar aaba aabb aabc aabm aabt aaca aacb aacc aace aacm aacr aact aaea aaec aaem aama aamb aamc aame aamr aara aarc aare aarm aart aata aatc aatt abaa abab abac abae abam abar abat abb- abba abbb abbe abbr abbt abca abcb abcc abcr abct abec abee aber abet abma abmb abmc abmt abra abrc abta ac-t acaa acab acac acae acar acat acba acca accc acce accm acct ace- acea acec acem acer acet acma acmc acme acr- acra acrc acre acrm acrr acta actc acte actt aeac aecb aect aeer aemt aer- aera aerc aeta aetc aetr aett amaa amac amae amam amar amat amb- amba ambe ambr amca amcc amec amee amer amet amm- amma amme amra amrc amta amtc amte arab arac arae aram arar arat arba arbe arc- arca arce arcm arct area arec aree arem aret arma armc arme armm armt arr- arra arrc arre arrr arrt arta artc arte artr at-t ataa atab atac atae atar atat atca atcc atcr atea atec atee atem ater atm- atma atme atra atrc atre atrm atta atte attr baaa baam baar baat baba babb babe babm babr bac- baca bacc bace bact baer bama bamb bamc bame bamm bar- bara barb barc bare barm barr bart bata batc bate batt bbbb bbcm bbeb bbet bbrc bcaa bcam bcar bcat bcbc bcca bccc bccm bcec bcer bcet bcma bcra bctc beam bear beat beba bebb bebe beca beeb beem beer beet bema beme bera berc bere berm berr bert beta betc bete bett bmaa bmce bmtc brab brac brae bram brat brca brcb brce brea breb brec bree brem brer bret brmc brrm brrr brtc btaa btcc btec btrc btrt bttb caaa caab caac caam caat caba cabe cac- caca cacc cace cacm cacr caec caem caer cama camb camc came camm camt cara carb carc care carm carr cart cat- cata catb catc cate catm catt cbac cbar cbat cbbc cbca cbcc cbce cbcm cbcr cbct cbea cbec cbee cber cbet cbme cbre cbrm cbrt cbta cbtc ccaa ccab ccac ccam ccar ccat ccba ccbc ccca cccb cccc cccm ccee ccma ccmb ccmc ccmm ccra ccrc ccre ccrt cctb cctc cctt ceac cear ceat ceba cec- ceca cece cecm cect ceeb ceec ceem cema cemb ceme cemm cemr cer- cera cerc cere cert cet- ceta cete cmaa cmac cmba cmbc cmcc cmea cmec cmmb cmmc cmra cmrr cmta cmtc crab crac cram crar crat crbc crca crcc crce crcr cre- crea creb crec cree crem cret crmb crrt crtc crtm ctab ctae ctba ctca ctec ctma ctrc ctrm ctta eaba eaca eacc eaec eama eame eara earb eare eart eata eate ebac ebam ebba ebbc ebbr ebcc eber ecaa ecac ecam ecar ecat ecbc ecbe ecca eccb eccc ecce eccm ecct ecem ecma ecra ecrc ecrm ecrr ect- ecta ectc eeca eeea eeee eera eerc eeta eetc eete emac emae emam emar emba embe embr emcc emer emet emma emme emra emre emta emte eram erat erba erbb erbe erca ercc erce ereb erec erem erer eret erma ermc erme erra errc erre erta etam etat etbc etbr etcc etec etee etem eter etra etre etrm etta ette maaa maac maam maar maat maba mabe mac- maca macb macc mace macr mact maee maem maer mama mamc mame mar- mara marc mare marm marr mart mata matc mate matr matt mbac mbam mbba mbca mbta mcaa mcac mcat mcba mcbc mcca mccc mcmc mcmt mcrc mctc mear meat mebe mec- meca mecc mece mecr meem meer meet mema memc meme memr mer- mera merb merc mere merm mert met- meta mete mett mmaa mmab mmac mmar mmcc mmcm mmct mmea mmmc mmmm mmrc mr-c mrac mrbb mrbm mrca mrcb mrcc mrce mreb mree mrmc mrrc mrta mrtm mrtt