-er a-a a-b a-c aaa aab aac aad aae aam aar ab- aba abb abc abd abe abm abr ac- aca acb acc acd ace acm acr ad- ada adb adc add ade adm adr aea aeb aec aed aee aem aer ama amb amc amd ame amm amr ar- ara arb arc ard are arm arr baa bab bac bad bae bam bar bba bbb bbc bbd bbe bbm bbr bca bcb bcc bcd bce bcm bcr bda bdb bdc bdd bde bdm bdr be- bea beb bec bed bee bem ber bma bmb bmc bmd bme bmm bmr bra brb brd bre brm brr c-- caa cab cac cad cae cam car cba cbb cbc cbd cbe cbm cbr cca ccb ccc ccd cce ccm ccr cda cdb cdc cdd cde cdm cdr ce- cea ceb cec ced cee cem cer cma cmb cmc cmd cme cmm cmr cra crb crc crd cre crm crr daa dab dac dad dae dam dar dba dbb dbc dbd dbe dbm dbr dca dcb dcc dcd dce dcm dcr dda ddb ddc ddd dde ddm ddr de- dea deb dec ded dee dem der dma dmb dmc dmd dme dmm dmr dra drb drc drd dre drm drr eaa eab eac ead eae eam ear eba ebb ebc ebd ebe ebm ebr ec- eca ecb ecc ecd ece ecm ecr ed- eda edb edc edd ede edm edr eea eeb eec eed eee eem eer em- ema emb emc emd eme emm emr era erb erc erd ere erm err m-r maa mab mac mad mae mam mar mba mbb mbc mbd mbe mbm mbr mc- mca mcb mcc mcd mce mcm mcr mda mdb mdc mdd mde mdm mdr mea meb mec med mee mem mer mma mmb mmc mmd mme mmm mmr mra mrb mrc mrd mre mrm mrr ra- raa rab rac rad rae ram rar rba rbb rbc rbd rbe rbm rbr rca rcb rcc rcd rce rcm rcr rda rdb rdc rdd rde rdm rdr re- rea reb rec red ree rem rer rma rmb rmc rmd rme rmm rmr rra rrb rrc rrd rrm rrr

a-be aaaa aaab aaac aaad aaae aaam aaar aaba aabb aabc aabd aabm aaca aacb aacc aacd aace aacm aacr aada aadc aade aaea aaec aaem aama aamb aamc aamd aame aamr aara aarc aard aare aarm abaa abab abac abad abae abam abar abb- abba abbb abbe abbr abca abcb abcc abcd abcr abda abec abed abee aber abma abmb abmc abra abrc acaa acab acac acad acae acar acba acca accc accd acce accm acda acdb acdc acde acdm ace- acea acec aced acem acer acma acmc acme acr- acra acrc acre acrm acrr adaa adab adac adad adae adam adar adba adbc adcc adda addc addd adde addr adea adeb adee adem ader adma admb adme admr adra adre aeac aecb aede aeer aer- aera aerc aerd amaa amac amad amae amam amar amb- amba ambe ambr amca amcc amda amec amed amee amer amm- amma amme amra amrc arab arac arad arae aram arar arba arbe arc- arca arce arcm arda ardc arde ardm area arec ared aree arem arma armc armd arme armm arr- arra arrc arre arrr baaa baad baam baar baba babb babe babm babr bac- baca bacc bace bada badb badd bade badr baed baer bama bamb bamc bame bamm bar- bara barb barc bard bare barm barr bbad bbbb bbcm bbdd bbeb bbrc bcaa bcam bcar bcbc bcca bccc bccm bcda bcde bcec bcer bcma bcra bd-r bdbc bddc bdrm bead beam bear beba bebb bebe beca beda bede beeb beed beem beer bema beme bera berc berd bere berm berr bmaa bmce bmdb brab brac brad brae bram brca brcb brce brda brdm brea breb brec bred bree brem brer brmc brrm brrr c-cd caaa caab caac caam caba cabe cac- caca cacc cace cacm cacr cada cadc cadd cade cadm cadr caec caem caer cama camb camc came camm cara carb carc card care carm carr cbac cbar cbbc cbca cbcc cbce cbcm cbcr cbdb cbdc cbea cbec cbee cber cbme cbrd cbre cbrm ccaa ccab ccac ccad ccam ccar ccba ccbc ccca cccb cccc cccm ccdc ccdm ccdr cced ccee ccma ccmb ccmc ccmd ccmm ccra ccrc ccre cd-e cd-r cdaa cdac cdad cdba cdda cddb cddr cdec cder cdma cdre ceac cead cear ceba cec- ceca cece cecm ceda cedd cede ceeb ceec ceem cema cemb ceme cemm cemr cer- cera cerc cerd cere cmaa cmac cmba cmbc cmcc cmda cmdb cmdr cmea cmec cmmb cmmc cmra cmrr crab crac cram crar crbc crca crcc crce crcr crda crdc cre- crea creb crec cred cree crem crmb daab daad daae daam daar daba dabb daca dace dada dade daeb daem daer dama damb dame damm dara darb darc dard dare darr dbar dbcc dcbc dcca dccb dccc dcdb dcma dcra dddd ddrc ddre deac dead deae dear deba debe dec- deca decc decd dece deda dedd dede deeb deed deem deer dem- dema demb demd deme der- dera derb derc dere derm derr dmaa dmab dmac dmae dmba dmcc dmcm dmdc dmea dmrb dmrc draa drab drac drad dram drar drba drbc drca drda drea dred dree drem drra eaba eaca eacc eada eadb eadd eaec eama eame eara earb eard eare ebac ebam ebba ebbc ebbr ebcc ebed eber ecaa ecac ecad ecam ecar ecbc ecbe ecca eccb eccc ecce eccm ecdc eced ecem ecma ecra ecrc ecrm ecrr edac edad edam edar edca edda eddc edde eddm ede- edea edem eder edma edme edra edrm eeca eede eeea eeee eera eerc emac emad emae emam emar emba embd embe embr emcc emer emma emme emra emre erad eram erba erbb erbe erca ercc erce erda erde ereb erec ered erem erer erma ermc erme erra errc erre maaa maac maad maam maar maba mabe mac- maca macb macc macd mace macr mada madb madc madd