bbbb bbci bbcm bbrc bcbc bccc bcci bccm bcit bctc bibb bibi bicc bici birb biri birr birt bitc bitt bmci bmic bmir bmmi bmtc brcb bric brim brit brmc brrm brrr brtc btcc btrc btrt bttb cbbc cbcc cbcm cbcr cbct cbir cbit cbrm cbrt cbtc ccbc cccb cccc ccci cccm ccic ccii ccim ccir ccmb ccmc ccmm ccrc ccri ccrt cctb cctc cctt cibc cibi cicc cici cicr cict ciii ciit cimb cimi cimm cimr cirb circ ciri cirm cirr cirt citb citi citt cmbc cmcc cmii cmir cmmb cmmc cmmi cmri cmrr cmtc crbc crcc crcr crib cric crim crit crmb crrt crtc crtm ctbi ctic ctrc ctrm ibbm ibim ibrc ibri ibtb ibtc icbc icbm iccb iccc icci iccr icct icmc icmi icmm icmt icrc icrm icrr icrt iiii iiit iimc iirc iitm iitr iitt imbi imcb imci imir imit immi immt imrc imri imrr irbm ircc iri- iric irmc irrc irri irti itcm itic itim itri mbci mbim mcbc mcbi mccc mcci mcic mcii mcit mcmc mcmi mcmt mcrc mcri mctc mibc micc mici micr mict miii miit mim- mimi mirc miri mirr mirt mit- mitb mitc miti mitm mitt mmcc mmci mmcm mmct mmic mmii mmmc mmmm mmrc mr-c mrbb mrbm mrcb mrcc mrmc mrrc mrtm mrtt mtbc mtcr mtrc mtrr mttr rbbb rbbr rcbc rccb rccc rcic rctc rcti rib- ricc rict rimi rimm riri riti ritt rrmc rrrr rtcc rtcm rtmc rtmi tbcb tbcc tbit tbrb tccc tctc tibi ticc tiit timi timm tirb tiri tirr titc titi titt tmbc tmbr tmcc tmcm tmtt trcc tri- trib tric trim trit trmb trmi trtc trtr ttbb ttim tttt