-er a-a a-b a-c a-t aaa aab aac aae aam aar aat aax ab- aba abb abc abe abm abr abt abx ac- aca acb acc ace acm acr act acx aea aeb aec aee aem aer aet aex ama amb amc ame amm amr amt amx ar- ara arb arc are arm arr art arx at- ata atb atc ate atm atr att atx ax- axa axe axm axr axt axx baa bab bac bae bam bar bat bax bba bbb bbc bbe bbm bbr bbt bbx bca bcb bcc bce bcm bcr bct bcx be- bea beb bec bee bem ber bet bex bma bmb bmc bme bmm bmr bmt bmx bra brb bre brm brr brt brx bta btb btc bte btm btr btt btx bxb bxm bxx c-- caa cab cac cae cam car cat cax cba cbb cbc cbe cbm cbr cbt cbx cca ccb ccc cce ccm ccr cct ccx ce- cea ceb cec cee cem cer cet cex cma cmb cmc cme cmm cmr cmt cmx cra crb crc cre crm crr crt crx cta ctb ctc cte ctm ctr ctt ctx cxc cxr cxt cxx eaa eab eac eae eam ear eat eax eba ebb ebc ebe ebm ebr ebt ebx ec- eca ecb ecc ece ecm ecr ect ecx eea eeb eec eee eem eer eet eex em- ema emb emc eme emm emr emt emx era erb erc ere erm err ert eta etb etc ete etm etr ett etx ex- exa exc exe exr ext exx m-r maa mab mac mae mam mar mat max mba mbb mbc mbe mbm mbr mbt mbx mc- mca mcb mcc mce mcm mcr mct mcx mea meb mec mee mem mer met mex mma mmb mmc mme mmm mmr mmt mmx mra mrb mrc mre mrm mrr mrt mrx mta mtb mtc mte mtm mtr mtt mtx mxa mxc mxr ra- raa rab rac rae ram rar rat rax rba rbb rbc rbe rbm rbr rbt rbx rca rcb rcc rce rcm rcr rct rcx re- rea reb rec ree rem rer ret rex rma rmb rmc rme rmm rmr rmt rmx rra rrb rrc rrm rrr rrt rta rtb rtc rte rtm rtr rtt rtx rxr t-x taa tab tac tae tam tar tat tax tba tbb tbc tbe tbm tbr tbt tca tcb tcc tce tcm tcr tct tcx te- tea teb tec tee tem ter tet tex tma tmb tmc tme tmm tmr tmt tmx tra trb trc tre trm trr trt trx tta ttb ttc tte ttm ttr ttt ttx txe txt xaa xac xam xar xat xbc xbe xbr xbx xcb xcr xcx xee xem xer xet xex xma xmc xmm xmr xmt xmx xrc xrt xrx xtc xtm xtr xtx xxx

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 abax 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 aetx amaa amac amae amam amar amat amax amb- amba ambe ambr ambx amca amcc amec amee amer amet amex amm- amma amme amra amrc amta amtc amte arab arac arae aram arar arat arax arba arbe arc- arca arce arcm arct area arec aree arem aret arex arma armc arme armm armt arr- arra arrc arre arrr arrt arta artc arte artr artx at-t at-x ataa atab atac atae atar atat atax atca atcc atcr atea atec atee atem ater atex atm- atma atme atra atrc atre atrm atrx atta atte attr axar axat axce axer ba-x 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 barx bata batc bate batt baxt 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 brax brca brcb brce brea breb brec bree brem brer bret brex brmc brrm brrr brtc btaa btcc btcx btec btex btrc btrt bttb caaa caab caac caam caat caba cabe cac- caca cacc cace cacm cacr caec caem caer caex cama camb camc came camm camt camx cara carb carc care carm carr cart carx cat- cata catb catc cate catm catt caxa cbac cbar cbat cbax cbbc cbca cbcc cbce cbcm cbcr cbct cbea cbec cbee cber cbet cbme cbre cbrm cbrt cbta cbtc cbxa 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 cexe cmaa cmac cmax cmba cmbc cmbx cmcc cmea cmec cmmb cmmc cmra cmrr cmta cmtc crab crac cram crar crat crax crbc crca crcc crce crcr cre- crea creb crec cree crem cret crex crmb crrt crtc crtm ctab ctae ctba ctca ctec ctma ctrc ctrm ctta cxxx 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 eext emac emae emam emar emax emba embe embr emcc