-er a-a a-b a-c aaa aab aac aae aam aao aar aax ab- aba abb abc abe abm abo abr abx ac- aca acb acc ace acm aco acr acx aea aeb aec aee aem aeo aer aex ama amb amc ame amm amo amr amx aoa aob aoc aoe aom aoo aor aox ar- ara arb arc are arm aro arr arx ax- axa axe axm axo axr axx baa bab bac bae bam bao bar bax bba bbb bbc bbe bbm bbo bbr bbx bca bcb bcc bce bcm bco bcr bcx be- bea beb bec bee bem beo ber bex bma bmb bmc bme bmm bmo bmr bmx boa bob boc boe bom boo bor box bra brb bre brm bro brr brx bxb bxm bxo bxx c-- caa cab cac cae cam cao car cax cba cbb cbc cbe cbm cbo cbr cbx cca ccb ccc cce ccm cco ccr ccx ce- cea ceb cec cee cem ceo cer cex cma cmb cmc cme cmm cmo cmr cmx co- coa cob coc coe com coo cor cox cra crb crc cre crm cro crr crx cxc cxo cxr cxx eaa eab eac eae eam eao ear eax eba ebb ebc ebe ebm ebo ebr ebx ec- eca ecb ecc ece ecm eco ecr ecx eea eeb eec eee eem eeo eer eex em- ema emb emc eme emm emo emr emx eo- eoa eob eoc eoe eom eoo eor era erb erc ere erm ero err ex- exa exc exe exo exr exx m-o m-r maa mab mac mae mam mao mar max mba mbb mbc mbe mbm mbo mbr mbx mc- mca mcb mcc mce mcm mco mcr mcx mea meb mec mee mem meo mer mex mma mmb mmc mme mmm mmo mmr mmx moa mob moc moe mom moo mor mox mra mrb mrc mre mrm mro mrr mrx mxa mxc mxr oaa oab oac oae oam oao oar oax ob- oba obb obc obe obm obo obr obx oc- oca ocb occ ocm oco ocr ocx oea oeb oec oee oem oeo oer oex om- oma omb omc ome omm omo omr omx oo- ooa oob ooc oom ooo oor oox or- ora orb orc ore orm oro orr orx ox- oxa oxb oxc oxo oxx ra- raa rab rac rae ram rao rar rax rba rbb rbc rbe rbm rbo rbr rbx rca rcb rcc rce rcm rco rcr rcx re- rea reb rec ree rem reo rer rex rma rmb rmc rme rmm rmo rmr rmx roa rob roc roe rom roo ror rox rra rrb rrc rrm rrr rxr xaa xac xam xar xbc xbe xbr xbx xcb xcr xcx xee xem xer xex xma xmc xmm xmo xmr xmx xoa xoc xom xoo xor xox xrc xrx xxo xxx

a-be aaaa aaab aaac aaae aaam aaar aaba aabb aabc aabm aaca aacb aacc aace aacm aaco aacr aaea aaec aaem aama aamb aamc aame aamo aamr aaoe aaoo aara aarc aare aarm aaro abaa abab abac abae abam abar abax abb- abba abbb abbe abbo abbr abca abcb abcc abcr abec abee aber abma abmb abmc aboa abob aboo abor abox abra abrc abro acaa acab acac acae acar acba acca accc acce accm acco ace- acea acec acem acer acma acmc acme acoa acoe acom acor acr- acra acrc acre acrm acro acrr aeac aecb aeer aeom aer- aera aerc aero amaa amac amae amam amar amax amb- amba ambe ambo ambr ambx amca amcc amco amec amee amer amex amm- amma amme ammo amob amoc amoo amor amra amrc amro aoba aoca aoce aoma aora aorb arab arac arae aram arar arax arba arbe arc- arca arce arcm arco area arec aree arem areo arex arma armc arme armm armo aroa arob aroe arom aroo aror arr- arra arrc arre arro arrr axar axce axer axo- axoa axxo ba-x baaa baam baar baba babb babe babm babo babr bac- baca bacc bace baco baer bama bamb bamc bame bamm bar- bara barb barc bare barm baro barr barx bbbb bbcm bbeb bbox bbrc bcaa bcam bcar bcbc bcca bccc bccm bcec bcer bcma bcor bcra beam bear beba bebb bebe bebo beca beeb beem beer bema beme beo- beor bera berc bere berm bero berr bmaa bmce bmoc boab boac boar boba bobb bobe bobo boca boce bocm boco boea boec boee boeo boer boma bomb bome boob booc booe boom boor boox bor- bora bore borm boro borr boxa brab brac brae bram brao brax brca brcb brce brea breb brec bree brem breo brer brex brmc broa brob broc broe brom broo bror brox brrm brrr c-bo caaa caab caac caam caba cabe cabo cac- caca cacc cace cacm caco cacr caec caem caer caex cama camb camc came camm camo camx caor cara carb carc care carm caro carr carx caxa cbac cbar cbax cbbc cbca cbcc cbce cbcm cbcr cbea cbec cbee cber cbme cbox cbre cbrm cbxa ccaa ccab ccac ccam ccar ccba ccbc ccca cccb cccc cccm ccee ccma ccmb ccmc ccmm ccob ccoc ccom ccra ccrc ccre ceac cear ceba cec- ceca cece cecm ceco ceeb ceec ceem cema cemb ceme cemm cemr ceor cer- cera cerc cere cero cexe cmaa cmac cmax cmba cmbc cmbx cmcc cmea cmec cmmb cmmc cmoc cmra cmrr coax coba cobb cobe cobo coca coce coco coex com- coma comb comc come comm como comr coob coom cor- cora corb corc core corm coro corr coxa coxe crab crac cram crar crax crbc crca crcc crce crcr cre- crea creb crec cree crem creo crex crmb crmo crob croc croe crom croo cror cxro cxxx eaba eaca eacc eaec eama eame eaom eara earb eare earo ebac ebam ebba ebbc ebbo ebbr ebcc eber eboe eboo ebor ebox ebro ecaa ecac ecam ecao ecar ecbc ecbe ecca eccb eccc ecce eccm ecco ecem ecma eco- ecra ecrc ecrm ecrr eeca eeea eeee eemo