-er a-a a-b a-c aaa aab aac aad aae aam aar aau ab- aba abb abc abd abe abm abr abu ac- aca acb acc acd ace acm acr acu ad- ada adb adc add ade adm adr adu aea aeb aec aed aee aem aer aeu ama amb amc amd ame amm amr amu ar- ara arb arc ard are arm arr aru au- aua aub auc aud aue aum aur b-u baa bab bac bad bae bam bar bau bba bbb bbc bbd bbe bbm bbr bbu bca bcb bcc bcd bce bcm bcr bcu bda bdb bdc bdd bde bdm bdr bdu be- bea beb bec bed bee bem ber beu bma bmb bmc bmd bme bmm bmr bmu bra brb brd bre brm brr bru bua bub buc bud bue bum bur buu c-- caa cab cac cad cae cam car cau cba cbb cbc cbd cbe cbm cbr cbu cca ccb ccc ccd cce ccm ccr ccu cda cdb cdc cdd cde cdm cdr cdu ce- cea ceb cec ced cee cem cer ceu cma cmb cmc cmd cme cmm cmr cmu cra crb crc crd cre crm crr cru cua cub cuc cud cue cum cur cuu daa dab dac dad dae dam dar dau dba dbb dbc dbd dbe dbm dbr dbu dca dcb dcc dcd dce dcm dcr dcu dda ddb ddc ddd dde ddm ddr ddu de- dea deb dec ded dee dem der deu dma dmb dmc dmd dme dmm dmr dmu dra drb drc drd dre drm drr dru dua dub duc dud due dum dur eaa eab eac ead eae eam ear eau eba ebb ebc ebd ebe ebm ebr ebu ec- eca ecb ecc ecd ece ecm ecr ecu ed- eda edb edc edd ede edm edr edu eea eeb eec eed eee eem eer em- ema emb emc emd eme emm emr emu era erb erc erd ere erm err eru eu- eua eub euc eud eue eur m-r maa mab mac mad mae mam mar mau mba mbb mbc mbd mbe mbm mbr mbu mc- mca mcb mcc mcd mce mcm mcr mcu mda mdb mdc mdd mde mdm mdr mdu mea meb mec med mee mem mer meu mma mmb mmc mmd mme mmm mmr mmu mra mrb mrc mrd mre mrm mrr mru mua mub muc mud mue mum mur muu ra- raa rab rac rad rae ram rar rau rba rbb rbc rbd rbe rbm rbr rbu rca rcb rcc rcd rce rcm rcr rcu rda rdb rdc rdd rde rdm rdr rdu re- rea reb rec red ree rem rer reu rma rmb rmc rmd rme rmm rmr rra rrb rrc rrd rrm rrr rru rua rub ruc rud rue rum rur ruu ua- uaa uab uac uad uae uam uar uau uba ubb ubc ube ubr ubu uca ucb ucc ucd uce ucm ucr ucu uda udb udc udd ude udm udr udu uea ueb uec ued uee uem uer um- uma umb umc umd ume umm umr umu ur- ura urb urc urd ure urm urr uru uua uuc uue uum uur uuu

a-be aaaa aaab aaac aaad aaae aaam aaar aaba aabb aabc aabd aabm aaca aacb aacc aacd aace aacm aacr aacu aada aadc aade aadu aaea aaec aaem aama aamb aamc aamd aame aamr aara aarc aard aare aarm aaru abaa abab abac abad abae abam abar abau abb- abba abbb abbe abbr abca abcb abcc abcd abcr abda abdu abec abed abee aber abma abmb abmc abra abrc abua abud abue abum acaa acab acac acad acae acar acba acca accc accd acce accm accu acda acdb acdc acde acdm ace- acea acec aced acem acer acma acmc acme acmu acr- acra acrc acre acrm acrr acu- acue acum acur adaa adab adac adad adae adam adar adba adbc adcc adda addc addd adde addr addu adea adeb adee adem ader adma admb adme admr adra adre adua adub adue adur aeac aecb aede aeer aer- aera aerc aerd amaa amac amad amae amam amar amb- amba ambe ambr ambu amca amcc amda amec amed amee amer ameu amm- amma amme ammu amra amrc amua amud amum amur arab arac arad arae aram arar arau arba arbe arc- arca arce arcm arda ardc arde ardm ardu area arec ared aree arem areu arma armc armd arme armm armu arr- arra arrc arre arrr arru arua arub arud arue arum auaa aube auca auce audc aude auer auma aur- aura aurd aure baaa baad baam baar baba babb babe babm babr babu bac- baca bacc bace bada badb badd bade badr badu baed baer bama bamb bamc bame bamm bamu bar- bara barb barc bard bare barm barr baru bau- baud baum baur bbad bbau bbbb bbcm bbdd bbeb bbrc bcaa bcam bcar bcbc bcca bccc bccm bcda bcde bcec bcer bcma bcra bcru bcuc bd-r bdbc bddc bdrm bead beam bear beau beba bebb bebe beca becu beda bede bedu beeb beed beem beer bema beme bemu bera berc berd bere berm berr beru beur bmaa bmce bmdb brab brac brad brae bram brau brca brcb brce brda brdm brea breb brec bred bree brem brer brmc brrm brrr bruc brud brue brum buad buar buba bubb bube bubu buca bucc buce bucu buda budb budd bude budu buea buem buer bueu bum- buma bumb bur- bura burb burd bure burm burr buru c-cd caaa caab caac caam caba cabe cabu cac- caca cacc cace cacm cacr cada cadc cadd cade cadm cadr cadu caec caem caer caeu cama camb camc came camm cara carb carc card care carm carr cauc caum cbac cbar cbbc cbca cbcc cbce cbcm cbcr cbcu cbdb cbdc cbea cbec cbee cber cbme cbrd cbre cbrm ccaa ccab ccac ccad ccam ccar ccba ccbc ccca cccb cccc cccm cccu ccdc ccdm ccdr cced ccee ccma ccmb ccmc ccmd ccmm ccra ccrc ccre ccuc cd-e cd-r cdaa cdac cdad cdba cdda