bbbb bbbs bbdd bblb bbls bd-r bdii bdls bdsd bibb bibi bibl bibs bidi bidr bids biis bild bili bill bils birb bird biri birl birr birs bis- bisd bisl biss bldr blir blis blls blss brds brid bril bris brls brrr brrs brsb brsr bsbd bsdl bsrd bssd dbls dbrs dbss dddd ddss dibb dibs didi dids diii diis dili dill dils dird dirl dirr dirs dis- disd disi diss dlbd dlib dlii dlil dlis dlrs drib dril drrs dsdr dsls dsri dsrr dssi ibid ibis ibrd ibri ibss idid idil idir idis idli idls idss iiii iiis iirs iisd iisi iisr ilir ilis ill- illd illi ills irds iri- irid iril iris irlb irri irrs isbd isbl isdb isds isil isis isls isri issi issr isss lbds lblr lbrs ldls ldrs libr libs lidb lidl lids liii liir liis lilb lili lill lils lird liri lirl lirr lirs lisd lisi liss llbs lldb llds llll lrdd lrds lrrr ls-r lsds lsid lssr rbbb rbbr rbbs rbds rbis rbsd rbsl rbss rib- ribs ridd ridi rids riis rill riri rirs risd risi riss rlds rlls rrrr rsbi rsdd rsdl rsds rsid rsis rssl s-ib s-ii sbbs sbds sbsd sbsi sdds sdib sdls sdrs sdsl sdss sibi sibs sidd sidi sidr sids sil- sild sili sill sils siri sirr sirs sisd sisi siss sl-i slds slib slid slir slrs srib sris srsd ssbr ssdd ssid ssis ssri ssrl ssrs sssb sssi ssss