bbbb bbci bbcm bbdd bbrc bcbc bccc bcci bccm bcru bcuc bd-r bdbc bddc bdii bdmi bdrm bibb bibi bicc bici bidi bidr bidu birb bird biri birr biru bmci bmdb bmic bmir bmmi brcb brdm bric brid brim brmc brrm brrr bruc brud brum bubb bubi bubu bucc buci bucu budb budd budi budu buic buid buir buiu bum- bumb bur- burb burd buri burm burr buru c-cd cbbc cbcc cbcm cbcr cbcu cbdb cbdc cbdi cbid cbir cbrd cbrm ccbc cccb cccc ccci cccm cccu ccdc ccdi ccdm ccdr ccic ccid ccii ccim ccir ccmb ccmc ccmd ccmm ccrc ccri ccuc cd-r cddb cddr cdic cdii cibc cibi cicc cici cicr cicu cidc cidi cidr ciid ciii cimb cimd cimi cimm cimr cirb circ ciri cirm cirr ciuc cmbc cmcc cmdb cmdr cmii cmir cmmb cmmc cmmi cmri cmrr crbc crbu crcc crcr crdc crib cric crim criu crmb crub crud crum cub- cubb cubi cucc cuci cucm cudi cui- cuir cum- curb curd curi curr dbcc dcbc dccb dccc dcci dccu dcdb dcii dcim dcmi dcmu dddd ddrc ddub dibb dici didi didu diii dimi dimm dimu dird dirr dmcc dmcm dmdc dmrb dmrc drbc drib dric drub drui drum druu dub- dubb dubc dubu dudd dudu duid duir dumb dumi dumm duri duru duur ibbm ibid ibim ibrc ibrd ibri icbc icbd icbm iccb iccc icci iccr iccu icdc icdd icmc icmi icmm icrc icrm icrr icru icub idbm idcr iddm idic idid idir idrc idub iicd iiii iimc iirc iiuc iium imbi imcb imci imdb imdi imid imir immi imrc imri imrr irbm ircc ircd ircu irdc iri- iric irid irmc irrc irri iucc iuiu mbci mbdb mbim mcbc mcbi mccc mccd mcci mcdc mcdd mcdi mcic mcii mcmc mcmi mcrc mcrd mcri mdcc mdci mddm mdic mdii mdmc mdrc mdud mibc micc micd mici micr mid- midi miii mim- mimd mimi mirc mird miri mirr miru miui mmcc mmcd mmci mmcm mmdb mmdc mmdi mmic mmii mmmc mmmd mmmm mmrc mr-c mrbb mrbm mrcb mrcc mrdd mrmc mrmd mrrc mrud mubi muc- mucc mucu mudd mudi mudu muid muir mumm mumu murc murd muri murr muru rbbb rbbr rcbc rccb rccc rcdc rcic rcid rcrd rdbm rdcm rib- ribu ricc ridc ridd ridi rimi rimm rimu riri rrmc rrrr rrum rubb rubi rubu ruci rudd rudi ruid rumb rumi rumm rurc rurd ruri ruru ruud ubbi ubic ubid ubii ubir ubud ucbc ucci ucdc ucdd ucmc ucrc udbc uddi udic udid udim udir udmc uirr umb- umbi umri urbi urci urdu urib uric urim uriu urmi urri urum urur uuri uuuu