bbbb bbbs bbcm bcbc bcbs bccc bccm bccs bcms bcsc bcsm bcss bctc bcts bmtc bmts bscs bsms bsmt bssc bssm bsts btcc btcs btss bttb cbbc cbbs cbcc cbcm cbcs cbct cbms cbsc cbsm cbtc ccbc cccb cccc cccm cccs ccmb ccmc ccmm ccms ccss ccst cctb cctc cctt cmbc cmbs cmcc cmcs cmmb cmmc cmms cmsc cmst cmtc csbm cscb cscc cscs csmc cssm cstc cstm csts ctbs ctsc ctss ctts mbbs mbcs mbms mcbc mccc mcmc mcmt mcss mcst mctc mcts mmcc mmcm mmcs mmct mmmc mmmm mmms mmsc mmst mmts mscc msmb msmc msmm msms mssm msst mstc msts mtbc mtbs mtss mtst mtts sbbs sbcc sbcs sbct sbmc sbst sbtc sccc sccm sccs scct scmc scmm scms scsc scst sctc scts smbc smcc smsc smss smtc sscc sscs ssmc sssb sssc sssm ssss sstb sstc ssts stbc stbs stcc stcs stmc stms stmt stsm stss sttc tbbs tbcb tbcc tbst tcbs tccc tctc tcts tmbc tmcc tmcm tmsc tmtt tsbc tscc tsmc tssm tsst tstc tstm tsts ttbb ttms ttss tttt