bbbb bbbs bbdd bd-r bdii bdry bdsd bibb bibi bibs bidi bidr bids bidu biis birb bird biri birr birs birt biru biry bis- bisd biss bist bisu bisy bitd bits bitt bitu biys brds brdt brdy brid bris brit brrr brrs brsb brsr brst brud brus brut bry- bryd bsbd bsrd bssd bsts btdt btrt btry btss bttb btus bubb bubi bubs bubu budb budd budi buds budu budy buid buir buis buit buiu bur- burb burd buri burr burs burt buru bury busi buss bust busu busy but- buti buts butt buty buus buyi buys buyu byit byrd byrt bysb bysi byss byst bysy byts byyd dbit dbrs dbss dbtt dbus dddd ddry ddss ddts ddub dibb dibs diby didi dids didu didy diii diis dird dirr dirs dirt dis- disd disi diss dist disy diti dits ditt dius diyi diyu drib drit drrs drub drui drus drut druu dry- drys dsdr dsri dsrr dssi dsst dsts dtss dub- dubb dubs dubu duby dudd duds dudu duid duir duis duit duri durt duru dury dusi dust dusy duts duty duur duut duyr dybt dybu dydd dyit dyr- dyrb dyri dyrt dyru dys- dysi dysr dyss dyst dyt- dyty dyur dyyr i-by ibid ibis ibrd ibri ibss ibtb ibts ibus ibuy ibyi idid idir idis idss idts idub idus iiii iiis iiit iirs iisd iisi iisr iist iisu iitr iitt irby irds iri- irid iris iriy irri irrs irti irts irus isbd isbt isdb isds isis isit isri issi issr isss issu issy istd isti istr ists isty isus isys itbs itby itis itri itrs itry itsi itsu itsy itty itur iuds iuiu iusd iuss iust iuty rbbb rbbr rbbs rbds rbis rbsd rbss rbst rib- ribs ribu riby ridd ridi rids riis riri rirs risd risi riss rist risu riti rits ritt ritu rius rrrr rsbi rsdd rsds rsid rsis rsts rstu rtdt rtss rtts rubb rubi rubs rubu ruby rudd rudi ruds rudy ruid ruis ruit rurd ruri rurs ruru rusi russ rust rusu rusy ruti ruts rutt rutu ruty ruud ruyd ruyi ruys rydy ryis rysy rytt ryyt s-ib s-ii sbbs sbds sbsd sbsi sbst sbus sdds sdib sdrs sdry sdss sdsu sibi sibs sibu siby sidd sidi sidr sids sidy siit siri sirr sirs sirt siru sisd sisi siss sist sisu sisy sit- sitd siti sits sitt situ sity siui sius siut siyi siyu srby srib sris srsd srtr srub ssbr ssby ssdd ssid ssis ssit ssri ssrs sssb sssi ssss sstb sstd ssts stbd stbs stds stib stid stir stis stit strd stri strs stru stry stsi stss sttd sttr stub stud stur stus stut stuy styd styr stys sub- subb subd subi subs sudd sudi suds suid suir suis suit sur- surd suri surr surs surt suru sury sus- susd susi suss sust susu susy suti sutu suty suus suyi suyr suyu sydi syds syis syrs syrt syry syss syst sytt tbbs tbit tbrb tbst tddb tdis tdri tdss tibi tibs tibu tidd tids tidy tiit tiiu tirb tird tiri tirr tirs tiru tiry tisb tisi tiss tist titi tits titt titu tiyi tri- trib tris trit trsd trsi trst trtr trub trud trus trut truu try- tryb trys tsbd tsdb tsid tsis tssi tssr tsst tsts tsui tsys ttbb ttss tttt ttyd ttys tubb tubr tubs tubu tudi tudu tuis tuit tuiu turb turd turi turr turs turt turu tury tusd tusi tuss tust tuti tuts tutt tutu tuty tuys tybi tydd tydi tydy tyir tyr- tyrr tyss tyst tytd tyti tytt tyty tyus ubbi ubid ubii ubir ubis ubit ubud uddi udds udid udir udsd udts uirr uisd uist uits urbi urbs urds urdu urdy urib uris uriu urri urry ursi urss ursu ursy urts urur urus urut usbr usbs usds usdt usis ussb ussr usss usst ussu ussy ustb usti usts usui usus utby utid utis utri utti uttu uuri uusi uuuu uyir uyts ybbs ybry ydyt yidi yids yidu yirb yird yirr yiss yist yiti yiud ysby ysii yssu ysyb yubu yudu yuit yurd yuri yurt yury yust yutu yuty yuyu yyyy