-er a-a a-b a-c aaa aab aac aae aag aam aar ab- aba abb abc abe abg abm abr ac- aca acb acc ace acg acm acr aea aeb aec aee aeg aem aer ag- aga agb agc age agg agm agr ama amb amc ame amg amm amr ar- ara arb arc are arg arm arr baa bab bac bae bag bam bar bba bbb bbc bbe bbg bbm bbr bca bcb bcc bce bcg bcm bcr be- bea beb bec bee beg bem ber bga bgb bgc bge bgg bgm bgr bma bmb bmc bme bmg bmm bmr bra brb bre brg brm brr c-- caa cab cac cae cag cam car cba cbb cbc cbe cbg cbm cbr cca ccb ccc cce ccg ccm ccr ce- cea ceb cec cee ceg cem cer cga cgb cgc cge cgg cgm cgr cma cmb cmc cme cmg cmm cmr cra crb crc cre crg crm crr eaa eab eac eae eag eam ear eba ebb ebc ebe ebg ebm ebr ec- eca ecb ecc ece ecg ecm ecr eea eeb eec eee eeg eem eer ega egb egc ege egg egm egr em- ema emb emc eme emg emm emr era erb erc ere erg erm err gaa gab gac gae gag gam gar gba gbc gbe gbg gbm gbr gca gcb gcc gce gcg gcm gcr ge- gea geb gec gee geg gem ger gga ggb ggc ggg ggm ggr gma gmb gmc gme gmg gmm gmr gra grb grc gre grg grm grr m-r maa mab mac mae mag mam mar mba mbb mbc mbe mbg mbm mbr mc- mca mcb mcc mce mcg mcm mcr mea meb mec mee meg mem mer mga mgb mgc mge mgm mgr mma mmb mmc mme mmg mmm mmr mra mrb mrc mre mrg mrm mrr ra- raa rab rac rae rag ram rar rba rbb rbc rbe rbg rbm rbr rca rcb rcc rce rcg rcm rcr re- rea reb rec ree reg rem rer rga rgb rgc rge rgg rgr rma rmb rmc rme rmg rmm rmr rra rrb rrc rrg rrm rrr

a-be aaaa aaab aaac aaae aaam aaar aaba aabb aabc aabm aaca aacb aacc aace aacm aacr aaea aaec aaem aage aama aamb aamc aame aamr aara aarc aare aarm abaa abab abac abae abag abam abar abb- abba abbb abbe abbr abca abcb abcc abcr abec abee aber abma abmb abmc abra abrc acaa acab acac acae acag acar acba acca accc acce accm ace- acea acec acem acer acga acgr acma acmc acme acmg acr- acra acrc acre acrm acrr aeac aecb aeer aega aer- aera aerc agac agag agam agar agba agca agcc agce agea agee agem ager agga agge agma agmc agme agra agre amaa amac amae amag amam amar amb- amba ambe ambr amca amcc amec amee amer amga amm- amma amme amra amrc arab arac arae arag aram arar arba arbe arc- arca arce arcm area arec aree areg arem arga argb arge arma armc arme armm arr- arra arrc arre arrg arrr baaa baam baar baba babb babe babm babr bac- baca bacc bace baer baga bage bagg bama bamb bamc bame bamm bar- bara barb barc bare barg barm barr bbbb bbcm bbeb bbga bbgm bbmg bbrc bbrg bcaa bcam bcar bcbc bcbg bcca bccc bccm bcec bcer bcma bcra beag beam bear beba bebb bebe beca beeb beeg beem beer bega begg bema beme bera berc bere berg berm berr bgca bmaa bmag bmce brab brac brae brag bram brca brcb brce brea breb brec bree breg brem brer brmc brrm brrr caaa caab caac caam caba cabe cabg cac- caca cacc cace cacm cacr caec caem caer caga cage cagg cagr cama camb camc came camm cara carb carc care carm carr cbac cbar cbbc cbca cbcc cbce cbcm cbcr cbea cbec cbee cber cbga cbgb cbme cbre cbrm ccaa ccab ccac ccag ccam ccar ccba ccbc ccca cccb cccc cccm ccee ccga ccgc ccma ccmb ccmc ccmm ccra ccrc ccre ccrg ceac cear ceba cec- ceca cece cecm ceeb ceec ceem cege cema cemb ceme cemm cemr cer- cera cerc cere cgac cgcc cgcg cger cgmc cmaa cmac cmba cmbc cmcc cmea cmec cmmb cmmc cmra cmrr crab crac crag cram crar crbc crca crcc crce crcr cre- crea creb crec cree creg crem crmb eaba eaca eacc eaec eaga eage eama eame eara earb eare ebac ebam ebba ebbc ebbr ebcc eber ecaa ecac ecam ecar ecbc ecbe ecca eccb eccc ecce eccm ecem ecma ecra ecrc ecrm ecrr eeca eeea eeee eega eera eerc eerg egaa egae egar egba egbe egcc egcg egcr egea egec egee egem eger eggb egge egma egra egre emac emae emag emam emar emba embe embr emcc emer emma emme emra emre eram erba erbb erbe erca ercc erce ereb erec erem erer erg- erga ergg erma ermc erme erra errc erre gaar gaba gabb gabe gabr gace gaea gaec gaer gaga gage gagg gam- gama gamb game gamm gara garb gare garg garm garr gbag gbmc gc-c gcaa gcbc gccc gcma gcmc gcrg geab gear geba gebe geca gece geer gege gegg gem- gema gemm gemr gera gerb gere germ gggg gmac gmer gmme gmmr grab grac grae gram grbr grcc grce grea greb grec gree greg grem grrr maaa maac maag maam maar maba mabe mac- maca macb macc mace macr maee maem maer maga mage magg mama mamc mame mar- mara marc mare marg marm marr mbac mbam mbba mbca mcaa mcac mcba mcbc mcca mccc mcga mcmc mcrc meag mear mebe mec- meca mecc mece mecr meem meer meg- mega mege megg megr mema memc meme memr mer- mera merb merc mere merm mgam mger mgga mgrm mmaa mmab mmac mmar mmcc mmcg mmcm mmea mmmc mmmm mmrc mr-c mrac mrbb mrbm mrca mrcb mrcc mrce mreb mree mreg mrmc mrrc raab raag raam raba rabb rabe rac- raca racc race raec raeg