bbbb bbbs bbdd bblb bbls bdii bdls bdsd bibb bibi bibl bibs bidi bids biis bild bili bill bils bilt bis- bisd bisl biss bist bitd bits bitt blbt blis blit blls blss blst blts bsbd bsdl bssd bsts btdt btss bttb dbit dbls dbss dbtt dddd ddss ddts dibb dibs didi dids diii diis dili dill dils dis- disd disi diss dist diti dits ditt dlbd dlib dlii dlil dlis dlit dlst dsls dssi dsst dsts dtss ibid ibis ibss ibtb ibtl ibts idid idil idis idli idls idss idts iiii iiis iiit iisd iisi iist iitt ilis ilit ill- illd illi ills illt ilts isbd isbl isbt isdb isds isil isis isit isls issi isss istd isti ists itbs itil itis itll itsi lbds ldls libs lidb lidl lids liii liis lilb lili lill lils lilt lisd lisi liss list litb litd liti litl lits litt llbs lldb llds llll lsds lsid lsts ltbl ltds ltib ltsi s-ib s-ii sbbs sbds sbsd sbsi sbst sdds sdib sdls sdlt sdsl sdss sibi sibs sidd sidi sids siit sil- sild sili sill sils silt sisd sisi siss sist sit- sitd siti sits sitt sl-i slds slib slid slit slst slts ssdd ssid ssis ssit sslt sssb sssi ssss sstb sstd sstl ssts stbd stbs stds stib stid stil stis stit stld stlt stsi stss sttd tbbs tbil tbit tbst tddb tdil tdis tdls tdss tibi tibs tidd tids tiit tild till tils tilt tisb tisi tiss tist titi tits titt tlli tsbd tsdb tsid tsis tssi tsst tsts ttbb ttss tttt