bbbb bbbs bbdd bbin bd-r bdii bdin bdsd bibb bibi bibs bidi bidr bids bidu biin biis bin- bind bini binn bins bint binu birb bird biri birn birr birs birt biru bis- bisd biss bist bisu bitd bits bitt bitu bnib bnin bnrr bnss brds brdt brid brin bris brit brns brrr brrs brsb brsr brst brud brun brus brut bsbd bsin bsnd bsns bsrd bssd bsts btdt btrt btss bttb btus bubb bubi bubs bubu budb budd budi buds budu buid buin buir buis buit buiu bunb bund buni bunn buns bunt bunu bur- burb burd buri burn burr burs burt buru busi buss bust busu but- buti buts butt buus dbit dbrn dbrs dbss dbtt dbus dddd ddss ddts ddub dibb dibs didi dids didu diii diis din- dini dinn dins dint dinu dird dirr dirs dirt dis- disd disi diss dist diti dits ditt dius dnis dntt dnus dnut drib drin drit drrs drub drui drus drut druu dsdr dsri dsrr dssi dssn dsst dstn dsts dtnb dtss dub- dubb dubs dubu dudd duds dudu duid duin duir duis duit dunn duns dunt duri durn durt duru dusi dust duts duur duut ibid ibis ibns ibrd ibri ibsn ibss ibtb ibts ibus idid idin idir idis idss idts idub idun idus iiii iiis iiit iirs iisd iisi iisr iist iisu iitr iitt inbd ind- indi inds indu inid inis init inni innr inns innu inri inrs inss inst insu intd inti intn intr ints intu inui inun inus irds iri- irid irin iris irri irrs irti irts irun irus isbd isbn isbt isdb isdn isds isin isis isit isnt isri issi issr isss issu istd isti istr ists isus itbs itin itis itri itrs itsi itsu itur iuds iuiu iusd iuss iust n-ii nbti nddb ndnt ndri ndsi ndss ndut nibi nibs nidd nidi nids niir niit niiu nind nini nins nirs nirt niru nisd nisi niss nist nisu nitb niti nitr nits niur nndb nnit nnnn nnss nntn nrds nrrd nrts nsds nsdt nsin nsis nsnr nsrd nssb nssr nsss nstd nsts nstu nsub ntds ntis ntnd ntnu ntru ntsb ntss ntsu nttr ntui nubi nubs nudd nudi nuin nuit nunn nuns nunt nurd nuri nurn nurr nurs nurt nuru nusi nuss nust nusu nuts nutt nutu rbbb rbbr rbbs rbds rbis rbsd rbss rbst rib- ribs ribu ridd ridi rids riin riis rind rinn riri rirs risd risi riss rist risu riti rits ritt ritu rius rnbr rnds rnin rnnt rntd rnut rrrr rrun rsbi rsdd rsds rsid rsis rsnn rsnr rsts rstu rtdt rtnd rtns rtss rtts rubb rubi rubs rubu rudd rudi ruds ruid ruin ruis ruit rund runi runn runs runt rurd ruri rurs ruru rusi russ rust rusu ruti ruts rutt rutu ruud ruun s-ib s-ii sbbs sbds sbsd sbsi sbst sbtn sbus sdds sdib sdrs sdss sdsu sibi sibs sibu sidd sidi sidr sids siit sind sini sinn sins sint sinu siri sirr sirs sirt siru sisd sisi siss sist sisu sit- sitd siti sitn sits sitt situ siui sius siut snib snid snir snit snns snrs snsd sntr snub snur snus srib sris srni srnn srsd srtr srub ssbn ssbr ssdd ssid ssin ssis ssit ssns ssri ssrs sssb sssi ssss sstb sstd ssts stbd stbs stds stib stid stir stis stit stnd stnn stnr stns strd stri strn strs stru stsi stss sttd sttr stub stud stun stur stus stut sub- subb subd subi subs sudd sudi suds suid suin suir suis suit sun- sunb sund suni sunn suns sunt sunu sur- surd suri surn surr surs surt suru sus- susd susi suss sust susu suti sutu suus tbbs tbit tbrb tbst tddb tdis tdri tdss tibi tibs tibu tidd tids tiit tiiu tind tini tinn tins tint tinu tirb tird tiri tirr tirs tiru tisb tisi tiss tist titi tits titt titu tndd tnts tnut tri- trib trin tris trit trsd trsi trst trtr trub trud trun trus trut truu tsbd tsdb tsid tsin tsis tssi tssr tsst tsts tsui tsun ttbb ttss tttt tubb tubr tubs tubu tudi tudu tuin tuis tuit tuiu tunb tund tuni tunn tuns tunu turb turd turi turn turr turs turt turu tusd tusi tuss tust tuti tuts tutt tutu ubbi ubid ubii ubir ubis ubit ubud uddi udds udid udin udir udsd udts udun uint uirr uisd uist uits unbd undi unds uni- unii unin unir unis unit unni unns unrs uns- unst untb unts unus unut urbi urbs urds urdu urib urin uris uriu urni urns urri ursi urss ursu urts urun urur urus urut usbr usbs usds usdt usin usis usnr usnu ussb ussr usss usst ussu ustb usti usts usui usun usus utid utin utis utri utti uttu uuni uuri uusi uuuu