bbbb bbci bbcm bbrc bcbc bccc bcci bccm bcru bcuc bibb bibi bicc bici birb biri birr biru bmci bmic bmir bmmi brcb bric brim brmc brrm brrr bruc brum bubb bubi bubu bucc buci bucu buic buir buiu bum- bumb bur- burb buri burm burr buru cbbc cbcc cbcm cbcr cbcu cbir cbrm ccbc cccb cccc ccci cccm cccu ccic ccii ccim ccir ccmb ccmc ccmm ccrc ccri ccuc cibc cibi cicc cici cicr cicu ciii cimb cimi cimm cimr cirb circ ciri cirm cirr ciuc cmbc cmcc cmii cmir cmmb cmmc cmmi cmri cmrr crbc crbu crcc crcr crib cric crim criu crmb crub crum cub- cubb cubi cucc cuci cucm cui- cuir cum- curb curi curr ibbm ibim ibrc ibri icbc icbm iccb iccc icci iccr iccu icmc icmi icmm icrc icrm icrr icru icub iiii iimc iirc iiuc iium imbi imcb imci imir immi imrc imri imrr irbm ircc ircu iri- iric irmc irrc irri iucc iuiu mbci mbim mcbc mcbi mccc mcci mcic mcii mcmc mcmi mcrc mcri mibc micc mici micr miii mim- mimi mirc miri mirr miru miui mmcc mmci mmcm mmic mmii mmmc mmmm mmrc mr-c mrbb mrbm mrcb mrcc mrmc mrrc mubi muc- mucc mucu muir mumm mumu murc muri murr muru rbbb rbbr rcbc rccb rccc rcic rib- ribu ricc rimi rimm rimu riri rrmc rrrr rrum rubb rubi rubu ruci rumb rumi rumm rurc ruri ruru ubbi ubic ubii ubir ucbc ucci ucmc ucrc uirr umb- umbi umri urbi urci urib uric urim uriu urmi urri urum urur uuri uuuu