bbbb bbbs bblb bbls bffl bffs bfsi bfts bftt bibb bibi bibl bibs biff bifi biis bili bill bils bilt bily bis- bisl biss bist bisy bits bitt biys blbt blis blit blls blss blst blts bly- blys bsff bsfs bsts btss bttb byil byit bylt bysb bysi bysl byss byst bysy byts fbis ffff ffii ffss fftf fibs fiff fifi fift fiii fiil fili fill fils fisi fiss fist fiti fits fitt flii flis flit flts flyi flys flyt fsfi fssf ft-l ftfy ftii ftlb fyfi fyli fyti i-by ibfi ibis ibly ibsf ibss ibtb ibtl ibts ibyi ifbb ifby iffy ifil ifis ifit ifsb iiii iiis iiit iisi iist iitt ilis ilit ill- illi ills illt illy ilts isbl isbt isil isis isit isls isly issf issi isss issy isti ists isty isyl isys itbs itby itif itil itis itll itsf itsi itsy ittf itty lfts libs liff lifl lift liii liis lilb lili lill lils lilt lily lisi liss list lisy litb liti litl lits litt lity liyl llbs llll lsts ltbf ltbl ltib ltsi lyff lyft lyfy lyif lyit lyly lys- lysi lysl lyss lyst lytt lyyf s-ib s-ii sbbs sbsi sbst sfls sfss sfts sibi sibs siby siff sifl sift sify siit sil- silf sili sill sils silt sisi siss sist sisy sit- siti sits sitt sity siyi sl-i slft slib slit slst slts slys ssby ssfl ssis ssit sslt sssb sssf sssi ssss sstb sstl ssts stbs stib stif stil stis stit stlt stsf stsi stss styf styl stys syff syfy syis syl- syli syll syls sylt syss syst sytt tbbs tbil tbit tbst tbyf tfsi tfss tibi tibs tiff tift tiit till tils tilt tily tisb tisi tiss tist titi tits titt tiyi tlli tsfl tsis tssf tssi tsst tsts tsys ttbb ttff ttss tttt ttyl ttys tybi tyff tyft tyl- tyll tyss tyst tyti tytt tyty ybbs yiff yift yili yill yilt yiss yist yiti ylli ylls ysby ysii ysyb yyff yyyy