bbbb bbbs bbcm bcbc bcbs bccc bccm bccs bcms bcsc bcsm bcsn bcss bnss bscs bsms bsns bssc bssm cbbc cbbs cbcc cbcm cbcn cbcs cbms cbsc cbsm cbsn ccbc ccbn cccb cccc cccm cccs ccmb ccmc ccmm ccms ccnb ccnc ccnm ccns ccsn ccss cmbc cmbs cmcc cmcs cmmb cmmc cmmn cmms cmsc cmsn cnbc cnbm cnss csbm cscb cscc cscs csmc cssm mbbs mbcs mbms mcbc mccc mcmc mcss mmcc mmcm mmcs mmmc mmmm mmms mmsc mnbb mscc msmb msmc msmm msms mssm nbbc nbcc nbcs ncbc ncbs nccc nccn nccs ncmm ncnc ncsc ncss nmmc nnmc nnnn nnss nsbm nscc nscs nsmb nsmc nssb nssc nsss sbbs sbcc sbcs sbmc sccc sccm sccs scmc scmm scms scsc scsn smbc smcc smnc smsc smsn smss sncc snns ssbn sscc sscs ssmc ssns sssb sssc sssm ssss