bbbb bbbs bmts bnrr bnss bntm brns brrm brrr brrs brsb brsr brst bsms bsmt bsns bsrm bssm bsts btrt btss bttb mbbs mbms mbrs mmmm mmms mmst mmts mnbb mntb mntn mrbb mrbm mrbs mrtm mrtn mrts mrtt msmb msmm msms msrb msrt mssm mssr msst mstr msts mtbs mtns mtnt mtrr mtss mtst mttr mtts nmnt nmtb nnmt nnnn nnss nntn nrts nsbm nsmb nsnr nssb nssr nsss nsts ntsb ntss nttm nttr rbbb rbbr rbbs rbms rbss rbst rmbs rmst rnbr rnnt rrrr rsnn rsnr rsts rtms rtns rtss rtts sbbs sbst sbtn smrt smsn smss smtn snns snrs sntr srnn srtr ssbn ssbr ssns ssrm ssrs sssb sssm ssss sstb ssts stbs stms stmt stnn stnr stns strn strs stsm stss sttr tbbs tbrb tbst tmbr tmnt tmtt tnts trmb trms trst trtr tssm tssr tsst tstm tsts ttbb ttms ttss tttt