-er a-a a-b a-c aaa aab aac aae aam aar aas aax ab- aba abb abc abe abm abr abs abx ac- aca acb acc ace acm acr acs acx aea aeb aec aee aem aer aes aex ama amb amc ame amm amr ams amx ar- ara arb arc are arm arr ars arx as- asa asb asc ase asm asr ass asx ax- axa axe axm axr axs axx baa bab bac bae bam bar bas bax bba bbb bbc bbe bbm bbr bbs bbx bca bcb bcc bce bcm bcr bcs bcx be- bea beb bec bee bem ber bes bex bma bmb bmc bme bmm bmr bms bmx bra brb bre brm brr brs brx bsa bsb bsc bse bsm bsr bss bsx bxb bxm bxx c-- caa cab cac cae cam car cas cax cba cbb cbc cbe cbm cbr cbs cbx cca ccb ccc cce ccm ccr ccs ccx ce- cea ceb cec cee cem cer ces cex cma cmb cmc cme cmm cmr cms cmx cra crb crc cre crm crr crs crx csa csb csc cse csm csr css csx cxc cxr cxs cxx eaa eab eac eae eam ear eas eax eba ebb ebc ebe ebm ebr ebs ebx ec- eca ecb ecc ece ecm ecr ecs ecx eea eeb eec eee eem eer ees eex em- ema emb emc eme emm emr ems emx era erb erc ere erm err ers es- esa esb esc ese esm esr ess esx ex- exa exc exe exr exs exx m-r maa mab mac mae mam mar mas max mba mbb mbc mbe mbm mbr mbs mbx mc- mca mcb mcc mce mcm mcr mcs mcx mea meb mec mee mem mer mes mex mma mmb mmc mme mmm mmr mms mmx mra mrb mrc mre mrm mrr mrs mrx msa msb msc mse msm msr mss msx mxa mxc mxr mxs ra- raa rab rac rae ram rar ras rax rba rbb rbc rbe rbm rbr rbs rbx rca rcb rcc rce rcm rcr rcs rcx re- rea reb rec ree rem rer res rex rma rmb rmc rme rmm rmr rms rmx rra rrb rrc rrm rrr rrs rsa rsb rsc rse rsm rsr rss rsx rxr rxs saa sab sac sae sam sar sas sax sba sbb sbc sbe sbm sbr sbs sbx sca scb scc sce scm scr scs scx se- sea seb sec see sem ser ses sex sma smb smc sme smm smr sms smx sr- sra srb src sre srm srr srs srx ss- ssa ssb ssc sse ssm ssr sss ssx sxc sxm sxs xaa xac xam xar xas xbc xbe xbr xbx xcb xcr xcx xee xem xer xes xex xma xmc xmm xmr xms xmx xrc xrx xsa xsb xsc xsm xss xxx

-ase a-be aaaa aaab aaac aaae aaam aaar aaas aaba aabb aabc aabm aaca aacb aacc aace aacm aacr aacs aaea aaec aaem aaes aama aamb aamc aame aamr aams aara aarc aare aarm aars aasa aasc aase aasm aass abaa abab abac abae abam abar abas abax abb- abba abbb abbe abbr abbs abca abcb abcc abcr abcs abec abee aber abes abma abmb abmc abms abra abrc abrs abs- absa abse abss acaa acab acac acae acar acas acba acca accc acce accm accs ace- acea acec acem acer aces acma acmc acme acms acr- acra acrc acre acrm acrr acrs acsa acsc acse acsm acss aeac aeas aebs aecb aeer aer- aera aerc aers aesc aess amaa amac amae amam amar amas amax amb- amba ambe ambr ambs ambx amca amcc amcs amec amee amer ames amex amm- amma amme amra amrc amsa amsc amss arab arac arae aram arar aras arax arba arbe arbs arc- arca arce arcm arcs area arec aree arem ares arex arma armc arme armm arms arr- arra arrc arre arrr arrs ars- arsa arsc arse asaa asab asac asae asam asar asas asba asbm asc- asca ascb ascc asce ascr ascx asea asec asee asem aser ases asma asme asmm asmr asms asmx asra asrc asrm asrs assa assc asse assr asss axar axce axer axes axse ba-x baaa baam baar baas baba babb babe babm babr babs bac- baca bacc bace bacs baer baes bama bamb bamc bame bamm bams bar- bara barb barc bare barm barr bars barx basa basc base bass bbas bbbb bbbs bbcm bbeb bbrc bcaa bcam bcar bcas bcbc bcbs bcca bccc bccm bccs bcec bcer bces bcma bcms bcra bcrs bcsa bcsc bcsm bcss beam bear beas beba bebb bebe beca becs beeb beem beer bees bema beme bera berc bere berm berr bers bes- besa bese besm bess bmaa bmce brab brac brae bram bras brax brca brcb brce brea breb brec bree brem brer bres brex brmc brrm brrr brrs brsb brsr bsaa bsac bsam bsas bscs bsea bseb bsec bsee bser bses bsms bsra bsrm bssc bsse bssm caaa caab caac caam caas caba cabe cabs cac- caca cacc cace cacm cacr caec caem caer caes caex cama camb camc came camm cams camx cara carb carc care carm carr cars carx casa casb casc case casm casr cass caxa cbac cbar cbax cbbc cbbs cbca cbcc cbce cbcm cbcr cbcs cbea cbec cbee cber cbme cbms cbre cbrm cbsa cbsc cbse cbsm cbxa ccaa ccab ccac ccam ccar ccas ccba ccbc ccca cccb cccc cccm cccs ccee ccma ccmb ccmc ccmm ccms ccra ccrc ccre ccrs ccsa ccss ceac cear ceas ceba cebs cec- ceca cece cecm cecs ceeb ceec ceem cees cema cemb ceme cemm cemr cems cer- cera cerc cere cers cesa cesc cese cesr cess cexe cmaa cmac cmas cmax cmba cmbc cmbs cmbx cmcc cmcs cmea cmec cmes cmmb cmmc cmms cmra cmrr cmrs cmsa cmsc cmse crab crac cram crar cras crax crbc crca crcc crce crcr cre- crea creb crec cree crem cres crex crmb crms crsa crss csaa csab csac csar csas csbm