bbbb bbbs bblb bbls bffl bffs bfpp bfsi bfts bftt bibb bibi bibl bibs biff bifi biis bili bill bils bilt bipp bips bis- bisl bisp biss bist bits bitt blbt blip blis blit blls blsp blss blst blts bpfl bptf bpti bsff bsfs bspp bsts btbp btlp btps btss bttb fbis ffff ffii ffps ffss fftf fibp fibs fiff fifi fift fiii fiil fili fill fils fipp fips fisi fiss fist fiti fits fitt flii flip flis flit flts fsfi fspf fssf fssp ft-l ftii ftlb ftps ibfi ibis ibsf ibss ibtb ibtl ibts ifbb ifil ifis ifit ifps ifsb ifsp iiii iiis iiit iipf iisi iisp iist iitt ilis ilit ill- illi illp ills illt ilts ipil ippf ipsi ipsp ipss ipts isbl isbt isfp isil isis isit isls ispf isps issf issi issp isss isti istp ists itbs itif itil itis itll itsf itsi itsp ittf lftp lfts libs liff lifl lift liii liis lilb lili lill lils lilt lip- lipb lipi lipl lipp lips lisi lisp liss list litb liti litl lits litt llbs llll llps lpfp lpft lppl lpss lptb lspl lssp lsts ltbf ltbl ltib ltps ltsi ltsp pbil pbsp pfff pfft pfis pfit pfli pfps pibb pibi piff pifs piip pil- pili pill pils pilt pipi pipp pips pisi piss pist pitf piti pits pitt plff plib plif plip plis plit plpp plsi plss pltf pltt ppib ppif ppli pppp ppps ppsf ppss ppts pptt psbt psfs psil psip psis pspi pspp psps psst psts ptbl s-ib s-ii sbbs sbsi sbsp sbst sfls sfss sftp sfts sibi sibs siff sifl sift siit sil- silf sili sill sils silt sipi sipp sips sipt sisi siss sist sit- siti sits sitt sl-i slbp slft slib slip slit sllp slpi slpp slps slst slts spfs spib spip spis spit splp spls sppf spps spsp spss spst sptb spts ssfl ssfp ssis ssit sslp sslt sspf sspl ssps sspt sssb sssf sssi ssss sstb sstl sstp ssts stbs stib stif stil stip stis stit stlt stpf stpp stps stsf stsi stss tbbs tbil tbit tbsp tbst tbtp tfpt tfsi tfss tftp tibi tibs tiff tift tiit till tils tilt tip- tipi tipp tips tipt tisb tisi tiss tist titi titp tits titt tlli tpls tppp tptp tsfl tsis tsps tspt tssf tssi tsst tsts ttbb ttff ttss tttt