bbbb bbbs bbdd bd-r bdii bdry bdsd bibb bibi bibs bidi bidr bids bidu biis birb bird biri birr birs biru biry bis- bisd biss bisu bisy biys brds brdy brid bris brrr brrs brsb brsr brud brus bry- bryd bsbd bsrd bssd bubb bubi bubs bubu budb budd budi buds budu budy buid buir buis buiu bur- burb burd buri burr burs buru bury busi buss busu busy buus buyi buys buyu byrd bysb bysi byss bysy byyd dbrs dbss dbus dddd ddry ddss ddub dibb dibs diby didi dids didu didy diii diis dird dirr dirs dis- disd disi diss disy dius diyi diyu drib drrs drub drui drus druu dry- drys dsdr dsri dsrr dssi dub- dubb dubs dubu duby dudd duds dudu duid duir duis duri duru dury dusi dusy duur duyr dybu dydd dyr- dyrb dyri dyru dys- dysi dysr dyss dyur dyyr i-by ibid ibis ibrd ibri ibss ibus ibuy ibyi idid idir idis idss idub idus iiii iiis iirs iisd iisi iisr iisu irby irds iri- irid iris iriy irri irrs irus isbd isdb isds isis isri issi issr isss issu issy isus isys iuds iuiu iusd iuss rbbb rbbr rbbs rbds rbis rbsd rbss rib- ribs ribu riby ridd ridi rids riis riri rirs risd risi riss risu rius rrrr rsbi rsdd rsds rsid rsis rubb rubi rubs rubu ruby rudd rudi ruds rudy ruid ruis rurd ruri rurs ruru rusi russ rusu rusy ruud ruyd ruyi ruys rydy ryis rysy s-ib s-ii sbbs sbds sbsd sbsi sbus sdds sdib sdrs sdry sdss sdsu sibi sibs sibu siby sidd sidi sidr sids sidy siri sirr sirs siru sisd sisi siss sisu sisy siui sius siyi siyu srby srib sris srsd srub ssbr ssby ssdd ssid ssis ssri ssrs sssb sssi ssss sub- subb subd subi subs sudd sudi suds suid suir suis sur- surd suri surr surs suru sury sus- susd susi suss susu susy suus suyi suyr suyu sydi syds syis syrs syry syss ubbi ubid ubii ubir ubis ubud uddi udds udid udir udsd uirr uisd urbi urbs urds urdu urdy urib uris uriu urri urry ursi urss ursu ursy urur urus usbr usbs usds usis ussb ussr usss ussu ussy usui usus uuri uusi uuuu uyir ybbs ybry yidi yids yidu yirb yird yirr yiss yiud ysby ysii yssu ysyb yubu yudu yurd yuri yury yuyu yyyy