-er a-a a-b a-c aaa aab aac aae aam aao aar ab- aba abb abc abe abm abo abr ac- aca acb acc ace acm aco acr aea aeb aec aee aem aeo aer ama amb amc ame amm amo amr aoa aob aoc aoe aom aoo aor ar- ara arb arc are arm aro arr baa bab bac bae bam bao bar bba bbb bbc bbe bbm bbo bbr bca bcb bcc bce bcm bco bcr be- bea beb bec bee bem beo ber bma bmb bmc bme bmm bmo bmr boa bob boc boe bom boo bor bra brb bre brm bro brr c-- caa cab cac cae cam cao car cba cbb cbc cbe cbm cbo cbr cca ccb ccc cce ccm cco ccr ce- cea ceb cec cee cem ceo cer cma cmb cmc cme cmm cmo cmr co- coa cob coc coe com coo cor cra crb crc cre crm cro crr eaa eab eac eae eam eao ear eba ebb ebc ebe ebm ebo ebr ec- eca ecb ecc ece ecm eco ecr eea eeb eec eee eem eeo eer em- ema emb emc eme emm emo emr eo- eoa eob eoc eoe eom eoo eor era erb erc ere erm ero err m-o m-r maa mab mac mae mam mao mar mba mbb mbc mbe mbm mbo mbr mc- mca mcb mcc mce mcm mco mcr mea meb mec mee mem meo mer mma mmb mmc mme mmm mmo mmr moa mob moc moe mom moo mor mra mrb mrc mre mrm mro mrr oaa oab oac oae oam oao oar ob- oba obb obc obe obm obo obr oc- oca ocb occ ocm oco ocr oea oeb oec oee oem oeo oer om- oma omb omc ome omm omo omr oo- ooa oob ooc oom ooo oor or- ora orb orc ore orm oro orr ra- raa rab rac rae ram rao rar rba rbb rbc rbe rbm rbo rbr rca rcb rcc rce rcm rco rcr re- rea reb rec ree rem reo rer rma rmb rmc rme rmm rmo rmr roa rob roc roe rom roo ror rra rrb rrc rrm rrr

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 abb- abba abbb abbe abbo abbr abca abcb abcc abcr abec abee aber abma abmb abmc aboa abob aboo abor 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 amb- amba ambe ambo ambr amca amcc amco amec amee amer amm- amma amme ammo amob amoc amoo amor amra amrc amro aoba aoca aoce aoma aora aorb arab arac arae aram arar arba arbe arc- arca arce arcm arco area arec aree arem areo arma armc arme armm armo aroa arob aroe arom aroo aror arr- arra arrc arre arro arrr 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 bbbb bbcm bbeb 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 bor- bora bore borm boro borr brab brac brae bram brao brca brcb brce brea breb brec bree brem breo brer brmc broa brob broc broe brom broo bror brrm brrr c-bo caaa caab caac caam caba cabe cabo cac- caca cacc cace cacm caco cacr caec caem caer cama camb camc came camm camo caor cara carb carc care carm caro carr cbac cbar cbbc cbca cbcc cbce cbcm cbcr cbea cbec cbee cber cbme cbre cbrm 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 cmaa cmac cmba cmbc cmcc cmea cmec cmmb cmmc cmoc cmra cmrr coba cobb cobe cobo coca coce coco com- coma comb comc come comm como comr coob coom cor- cora corb corc core corm coro corr crab crac cram crar crbc crca crcc crce crcr cre- crea creb crec cree crem creo crmb crmo crob croc croe crom croo cror eaba eaca eacc eaec eama eame eaom eara earb eare earo ebac ebam ebba ebbc ebbo ebbr ebcc eber eboe eboo ebor 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 eeoc eera eerc eero emac emae emam emar emba embe embo embr emcc emco emer emma emme emor emra emre eora eore eram erba erbb erbe erca ercc erce ereb erec erem erer erma ermc erme ermo erob eroc eroe eroo erra errc erre erro maaa maac maam maar maba mabe mabo mac- maca macb macc mace maco macr maee maem maeo maer mama mamc mame mamo maoc maor mar- mara marc mare marm maro marr mbac mbam mbba mbca mcaa mcac mcba mcbc mcca mccc mcmc mcrc mear mebe mebo mec- meca mecc mece meco mecr meem meer mema memc meme memo memr meoc meor mer- mera merb merc mere merm mero mmaa mmab mmac mmar mmcc mmcm mmea mmmc mmmm mmor mmrc moaa moab moac moam moar moba mobb mobe mobo moca moco moea moma mome momo mooa moob mooc mooe moor mora morb more moro mr-c