-er a-a a-b a-c aaa aab aac aae aam aar aau ab- aba abb abc abe abm abr abu ac- aca acb acc ace acm acr acu aea aeb aec aee aem aer aeu ama amb amc ame amm amr amu ar- ara arb arc are arm arr aru au- aua aub auc aue aum aur b-u baa bab bac bae bam bar bau bba bbb bbc bbe bbm bbr bbu bca bcb bcc bce bcm bcr bcu be- bea beb bec bee bem ber beu bma bmb bmc bme bmm bmr bmu bra brb bre brm brr bru bua bub buc bue bum bur buu c-- caa cab cac cae cam car cau cba cbb cbc cbe cbm cbr cbu cca ccb ccc cce ccm ccr ccu ce- cea ceb cec cee cem cer ceu cma cmb cmc cme cmm cmr cmu cra crb crc cre crm crr cru cua cub cuc cue cum cur cuu eaa eab eac eae eam ear eau eba ebb ebc ebe ebm ebr ebu ec- eca ecb ecc ece ecm ecr ecu eea eeb eec eee eem eer em- ema emb emc eme emm emr emu era erb erc ere erm err eru eu- eua eub euc eue eur m-r maa mab mac mae mam mar mau mba mbb mbc mbe mbm mbr mbu mc- mca mcb mcc mce mcm mcr mcu mea meb mec mee mem mer meu mma mmb mmc mme mmm mmr mmu mra mrb mrc mre mrm mrr mru mua mub muc mue mum mur muu ra- raa rab rac rae ram rar rau rba rbb rbc rbe rbm rbr rbu rca rcb rcc rce rcm rcr rcu re- rea reb rec ree rem rer reu rma rmb rmc rme rmm rmr rra rrb rrc rrm rrr rru rua rub ruc rue rum rur ruu ua- uaa uab uac uae uam uar uau uba ubb ubc ube ubr ubu uca ucb ucc uce ucm ucr ucu uea ueb uec uee uem uer um- uma umb umc ume umm umr umu ur- ura urb urc ure urm urr uru uua uuc uue uum uur uuu

a-be aaaa aaab aaac aaae aaam aaar aaba aabb aabc aabm aaca aacb aacc aace aacm aacr aacu aaea aaec aaem aama aamb aamc aame aamr aara aarc aare aarm aaru abaa abab abac abae abam abar abau abb- abba abbb abbe abbr abca abcb abcc abcr abec abee aber abma abmb abmc abra abrc abua abue abum acaa acab acac acae acar acba acca accc acce accm accu ace- acea acec acem acer acma acmc acme acmu acr- acra acrc acre acrm acrr acu- acue acum acur aeac aecb aeer aer- aera aerc amaa amac amae amam amar amb- amba ambe ambr ambu amca amcc amec amee amer ameu amm- amma amme ammu amra amrc amua amum amur arab arac arae aram arar arau arba arbe arc- arca arce arcm area arec aree arem areu arma armc arme armm armu arr- arra arrc arre arrr arru arua arub arue arum auaa aube auca auce auer auma aur- aura aure baaa baam baar baba babb babe babm babr babu bac- baca bacc bace baer bama bamb bamc bame bamm bamu bar- bara barb barc bare barm barr baru bau- baum baur bbau bbbb bbcm bbeb bbrc bcaa bcam bcar bcbc bcca bccc bccm bcec bcer bcma bcra bcru bcuc beam bear beau beba bebb bebe beca becu beeb beem beer bema beme bemu bera berc bere berm berr beru beur bmaa bmce brab brac brae bram brau brca brcb brce brea breb brec bree brem brer brmc brrm brrr bruc brue brum buar buba bubb bube bubu buca bucc buce bucu buea buem buer bueu bum- buma bumb bur- bura burb bure burm burr buru caaa caab caac caam caba cabe cabu cac- caca cacc cace cacm cacr caec caem caer caeu cama camb camc came camm cara carb carc care carm carr cauc caum cbac cbar cbbc cbca cbcc cbce cbcm cbcr cbcu cbea cbec cbee cber cbme cbre cbrm ccaa ccab ccac ccam ccar ccba ccbc ccca cccb cccc cccm cccu ccee ccma ccmb ccmc ccmm ccra ccrc ccre ccuc ceac cear ceba cebu cec- ceca cece cecm ceeb ceec ceem cema cemb ceme cemm cemr cemu cer- cera cerc cere cmaa cmac cmba cmbc cmcc cmea cmec cmmb cmmc cmra cmrr crab crac cram crar crau crbc crbu crca crcc crce crcr cre- crea creb crec cree crem creu crmb crub crue crum cuau cub- cuba cubb cube cuca cucc cuce cucm cuer cum- cuma cume cura curb cure curr eaba eaca eacc eaec eama eame eara earb eare ebac ebam ebba ebbc ebbr ebcc eber ebru ebur ecaa ecac ecam ecar ecbc ecbe ecca eccb eccc ecce eccm ecem ecma ecra ecrc ecrm ecrr ecru ecua eeca eeea eeee eera eerc emac emae emam emar emba embe embr emcc emer emeu emma emme emmu emra emre eram erau erba erbb erbe erca ercc erce ereb erec erem erer erma ermc erme erra errc erre erua erub eruc erum erur euba eubc euer eumc eur- eura eurc eure maaa maac maam maar maba mabe mabu mac- maca macb macc mace macr macu maee maem maer mama mamc mame mamu mar- mara marc mare marm marr maru maua maum maur mbac mbam mbba mbca mcaa mcac mcba mcbc mcca mccc mcmc mcrc mear mebe mec- meca mecc mece mecr meem meer mema memc meme memr memu mer- mera merb merc mere merm meru meum mmaa mmab mmac mmar mmcc mmcm mmea mmmc mmmm mmrc mr-c mrac mrbb mrbm mrca mrcb mrcc mrce mreb mree mrmc mrrc muac muar mube muc- mucc muce mucu muee muma mume mumm mumu mura murc mure murr muru raab raam raba rabb rabe rabu rac- raca racc race racu raec raer rama ramb rame ramm ramu rara rarb rare raua raub rauc raue raum rbbb rbbr rcac rcbc rccb rccc rea- reac reae ream rear reau reba rebb