bbbb bbci bbcm bbeb bbrc bcbc bccc bcci bccm bcec bcer bcie bebb bebe bebi beci beeb beem beer beic beim beir beme berc bere beri berm berr bibb bibe bibi bicc bice bici bieb bier birb bire biri birr bmce bmci bmic bmir bmmi brcb brce breb brec bree brei brem brer bric brie brim brmc brrm brrr cbbc cbcc cbce cbcm cbcr cbec cbee cber cbir cbme cbre cbrm ccbc cccb cccc ccci cccm ccee ccic ccii ccim ccir ccmb ccmc ccmm ccrc ccre ccri cec- cece ceci cecm ceeb ceec ceem ceim cemb ceme cemm cemr cer- cerc cere ceri cibc cibe cibi cicc cici cicr ciee cier ciii cimb cime cimi cimm cimr cirb circ cire ciri cirm cirr cmbc cmcc cmec cmii cmir cmmb cmmc cmmi cmri cmrr crbc crcc crce crcr cre- creb crec cree crei crem crib cric crie crim crmb ebbc ebbr ebcc eber ebic ecbc ecbe eccb eccc ecce ecci eccm ecem ecib ecim ecmi ecrc ecri ecrm ecrr eeee eerc eiec eiei eier eime eimi eire embe embi embr emcc emer emic emii emim emir emme emmi emre erbb erbe ercc erce ereb erec erei erem erer eric erie erim ermc erme errc erre i-be ibbm ibec ibie ibim ibrc ibri icbc icbm iccb iccc icci iccr icec icee icem icer icmc icme icmi icmm icrc icre icrm icrr iecc ieie ieme iere ieri iiie iiii iimc iirc imbe imbi imcb imci imec imer imir imme immi imrc imre imri imrr irbe irbm ircc iree irem irer iri- iric irie irmc irrc irre irri mbci mbim mcbc mcbi mccc mcci mcic mcii mcmc mcmi mcrc mcri mebe mec- mecc mece mecr meem meer meic meir memc meme memr mer- merb merc mere meri merm mibc micc mice mici micr miee miem mier miii mim- mime mimi mirc mire miri mirr mmcc mmci mmcm mmic mmii mmmc mmmm mmrc mr-c mrbb mrbm mrcb mrcc mrce mreb mree mrmc mrrc rbbb rbbr rcbc rccb rccc rcic rebb rebe recc rece reci recm recr reeb reem reii reim reir reme remi rere reri rib- ribe ricc rice riem rier rime rimi rimm rire riri rrmc rrrr