-er a-a a-b a-c aaa aab aac aad aae aam aao aar ab- aba abb abc abd abe abm abo abr ac- aca acb acc acd ace acm aco acr ad- ada adb adc add ade adm ado adr aea aeb aec aed aee aem aeo aer ama amb amc amd ame amm amo amr aoa aob aoc aod aoe aom aoo aor ar- ara arb arc ard are arm aro arr baa bab bac bad bae bam bao bar bba bbb bbc bbd bbe bbm bbo bbr bca bcb bcc bcd bce bcm bco bcr bda bdb bdc bdd bde bdm bdo bdr be- bea beb bec bed bee bem beo ber bma bmb bmc bmd bme bmm bmo bmr boa bob boc bod boe bom boo bor bra brb brd bre brm bro brr c-- caa cab cac cad cae cam cao car cba cbb cbc cbd cbe cbm cbo cbr cca ccb ccc ccd cce ccm cco ccr cda cdb cdc cdd cde cdm cdo cdr ce- cea ceb cec ced cee cem ceo cer cma cmb cmc cmd cme cmm cmo cmr co- coa cob coc cod coe com coo cor cra crb crc crd cre crm cro crr daa dab dac dad dae dam dao dar dba dbb dbc dbd dbe dbm dbo dbr dca dcb dcc dcd dce dcm dco dcr dda ddb ddc ddd dde ddm ddo ddr de- dea deb dec ded dee dem deo der dma dmb dmc dmd dme dmm dmo dmr doa dob doc dod doe dom doo dor dra drb drc drd dre drm dro drr eaa eab eac ead eae eam eao ear eba ebb ebc ebd ebe ebm ebo ebr ec- eca ecb ecc ecd ece ecm eco ecr ed- eda edb edc edd ede edm edo edr eea eeb eec eed eee eem eeo eer em- ema emb emc emd eme emm emo emr eo- eoa eob eoc eod eoe eom eoo eor era erb erc erd ere erm ero err m-o m-r maa mab mac mad mae mam mao mar mba mbb mbc mbd mbe mbm mbo mbr mc- mca mcb mcc mcd mce mcm mco mcr mda mdb mdc mdd mde mdm mdo mdr mea meb mec med mee mem meo mer mma mmb mmc mmd mme mmm mmo mmr moa mob moc mod moe mom moo mor mra mrb mrc mrd mre mrm mro mrr oaa oab oac oad oae oam oao oar ob- oba obb obc obd obe obm obo obr oc- oca ocb occ ocd ocm oco ocr oda odb odc odd ode odm odo odr oea oeb oec oed oee oem oeo oer om- oma omb omc omd ome omm omo omr oo- ooa oob ooc ood oom ooo oor or- ora orb orc ord ore orm oro orr ra- raa rab rac rad rae ram rao rar rba rbb rbc rbd rbe rbm rbo rbr rca rcb rcc rcd rce rcm rco rcr rda rdb rdc rdd rde rdm rdo rdr re- rea reb rec red ree rem reo rer rma rmb rmc rmd rme rmm rmo rmr roa rob roc rod roe rom roo ror rra rrb rrc rrd rrm rrr

a-be a-do aaaa aaab aaac aaad aaae aaam aaar aaba aabb aabc aabd aabm aaca aacb aacc aacd aace aacm aaco aacr aada aadc aade aaea aaec aaem aama aamb aamc aamd aame aamo aamr aaoe aaoo aara aarc aard aare aarm aaro abaa abab abac abad abae abam abar abb- abba abbb abbe abbo abbr abca abcb abcc abcd abcr abda abdo abec abed abee aber abma abmb abmc aboa abob abod aboo abor abra abrc abro acaa acab acac acad acae acar acba acca accc accd acce accm acco acda acdb acdc acde acdm ace- acea acec aced acem acer acma acmc acme acoa acod acoe acom acor acr- acra acrc acre acrm acro acrr adaa adab adac adad adae adam adao adar adba adbc adcc adda addc addd adde addo addr adea adeb adee adem adeo ader adma admb adme admr adob adoc adod adoe adoo ador adra adre adro aeac aecb aede aeer aeom aer- aera aerc aerd aero amaa amac amad amae amam amar amb- amba ambe ambo ambr amca amcc amco amda amdo amec amed amee amer amm- amma amme ammo amob amoc amod amoo amor amra amrc amro aoba aoca aoce aoma aora aorb arab arac arad arae aram arar arba arbe arc- arca arce arcm arco arda ardc arde ardm ardo area arec ared aree arem areo arma armc armd arme armm armo aroa arob arod aroe arom aroo aror arr- arra arrc arre arro arrr baaa baad baam baar baba babb babe babm babo babr bac- baca bacc bace baco bada badb badd bade bado badr baed baer bama bamb bamc bame bamm bar- bara barb barc bard bare barm baro barr bbad bbbb bbcm bbdd bbdo bbeb bbrc bcaa bcam bcar bcbc bcca bccc bccm bcda bcde bcec bcer bcma bcor bcra bd-r bdbc bddc bdrm bead beam bear beba bebb bebe bebo beca beda bede bedo beeb beed beem beer bema beme beo- beod beor bera berc berd bere berm bero berr bmaa bmce bmdb bmoc boab boac boad boar boba bobb bobe bobo boca boce bocm boco boda bodb bode bodo boea boec boee boeo boer boma bomb bome boob booc bood booe boom boor bor- bora bord bore borm boro borr brab brac brad brae bram brao brca brcb brce brda brdm brdo brea breb brec bred bree brem breo brer brmc broa brob broc brod broe brom broo bror brrm brrr c-bo c-cd caaa caab caac caam caba cabe cabo cac- caca cacc cace cacm caco cacr cada cadc cadd cade cadm cado cadr caec caem caer cama camb camc came camm camo caod caor cara carb carc card care carm caro carr cbac cbar cbbc cbca cbcc cbce cbcm cbcr cbdb cbdc cbdo cbea cbec cbee cber cbme cbrd cbre cbrm