bbb bbf bbl bbs bbt bfb bff bfl bfs bft blb blf bll bls blt bsb bsf bsl bss bst btb btf btl bts btt fbb fbf fbl fbs fbt fff ffl ffs fft flb flf fll fls flt fsb fsf fsl fss fst ftb ftf ftl fts ftt lbb lbf lbl lbs lbt lfb lff lfl lfs lft llb llf lll lls llt lsb lsf lsl lss lst ltb ltf ltl lts ltt sbb sbf sbl sbs sbt sfb sff sfl sfs sft slb slf sll sls slt ss- ssb ssf ssl sss sst stb stf stl sts stt tbb tbf tbl tbs tbt tfb tff tfl tfs tft tlf tll tls tlt tsb tsf tsl tss tst ttb ttf ttl tts ttt

bbbb bbbs bblb bbls bffl bffs bfts bftt blbt blls blss blst blts bsff bsfs bsts btss bttb ffff ffss fftf flts fssf ft-l ftlb lfts llbs llll lsts ltbf ltbl sbbs sbst sfls sfss sfts slft slst slts ssfl sslt sssb sssf ssss sstb sstl ssts stbs stlt stsf stss tbbs tbst tfss tsfl tssf tsst tsts ttbb ttff ttss tttt

ft-lb slsts sssss tbtbt tstlt ttttt

bbbbbb bs-tbs

bbbbbbb sssssss

bbbbbbbb

fllllllll

bbbbbbbbbbbbbbb