bbbb bbbs bbdd bbpr bd-r bdii bdsd bibb bibi bibs bidi bidr bids bidu biis bipp bips bipu birb bird biri birr birs birt biru bis- bisd bisp biss bist bisu bitd bits bitt bitu bprd bpsu bpti brds brdt brid bris brit brrr brrs brsb brsr brst brud brup brus brut bsbd bspp bspr bsrd bssd bsts bsup btbp btdt btps btrt btss bttb btus bubb bubi bubs bubu budb budd budi buds budu buid buir buis buit buiu bups bur- burb burd buri burp burr burs burt buru busi buss bust busu but- buti buts butt buus dbit dbpd dbrs dbss dbtt dbus dddd ddps ddss ddts ddub dibb dibp dibs didi dids didu diii diis dipp dips dipt dipu dird dirr dirs dirt dis- disd disi disp diss dist diti dits ditt dius dpdt dpsd dpst dpsu dpts drib drip drit drrs drsp drub drui drup drus drut druu dsdp dsdr dsip dsps dspt dsri dsrp dsrr dssi dssp dsst dsts dtdp dtss dttp dub- dubb dubs dubu dudd duds dudu duid duir duis duit duri durt duru dusi dust dutp duts duur duut ibid ibis ibrd ibri ibss ibtb ibts ibus idid idir idis idps idss idtp idts idub idus iiii iiis iiit iirs iisd iisi iisp iisr iist iisu iitr iitt ipdi ipid ippr ipri ipsi ipsp ipss ipts ipur ipus iput irbp irdp irds iri- irid irip iris irps irri irrs irsp irti irtp irts irus isbd isbt isdb isds isis isit ispr isps isri isrp issi issp issr isss issu istd isti istp istr ists isup isus itbs itis itri itrs itsi itsp itsu itup itur iuds iuiu iupp iusd iuss iust pbrs pbsp pdbs pdpr pdrs pdsd pdss pibb pibi pids piip pipi pipp pips piri pirr pirs piru pisd pisi piss pist pisu piti pitr pits pitt pitu pius ppds ppib ppid pppd pppp ppps ppru ppss ppts pptt ppur prbs pri- prid prii pris prpd prps prrd prri prrs prsd prsi prss prti prtp prtr prud prus prut pruu psbd psbr psbt psdi psdp psdr psds psid psip psis pspi pspp pspr psps psrd psrp psst psts pstu ptpd ptrd ptsd ptui pubs pubu puds pudu puid puir puis puit puiu pupi pups pupu pur- purb puri purp purr purs puru pusd pusi puss pust put- puti puts putt putu rbbb rbbr rbbs rbds rbis rbsd rbsp rbss rbst rdbp rib- ribs ribu ridd ridi rids riis ripd ripi ripp ripr rips ript riri rirs risd risi risp riss rist risu riti rits ritt ritu rius rpdp rpii rpps rptd rpts rrrr rrsp rsbi rsdd rsds rsid rsis rspb rsps rstp rsts rstu rtdt rtps rtss rttp rtts rubb rubi rubp rubs rubu rudd rudi rudp ruds ruid ruis ruit rupp rupt rurd ruri rurp rurs ruru rusi russ rust rusu ruti ruts rutt rutu ruud s-ib s-ii sbbs sbds sbsd sbsi sbsp sbst sbus sdds sdib sdpr sdps sdrs sdss sdsu sibi sibs sibu sidd sidi sidr sids siit sipi sipp sips sipt siri sirp sirr sirs sirt siru sisd sisi siss sist sisu sit- sitd siti sits sitt situ siui sius siut spdp spdr spdt spib spip spir spis spit sppd spps sprd spri sprs spsd spsp spss spst sptb sptr spts spud spui spur spus sput srib sris srps srpt srsd srsp srtp srtr srub ssbr ssdd ssdp ssid ssis ssit ssps sspt ssri ssrs sssb sssi ssss sstb sstd sstp ssts stbd stbs stds stib stid stip stir stis stit stpd stpp stps strd stri strs stru stsi stss sttd sttr stub stud stup stur stus stut sub- subb subd subi subs sudd sudi suds suid suir suis suit sup- supp supr sups supt sur- surd suri surp surr surs surt suru sus- susd susi susp suss sust susu suti sutu suus tbbs tbit tbrb tbsp tbst tbtp tddb tdis tdri tdss tibi tibs tibu tidd tids tiit tiiu tip- tipi tipp tips tipt tipu tirb tird tiri tirr tirs tiru tisb tisi tiss tist titi titp tits titt titu tpdu tpir tppd tppp tppr tprs tptp tptr tput tri- trib trip tris trit trpp trps trsd trsi trst trtr trub trud trus trut truu tsbd tsdb tsid tsis tsps tspt tssi tssr tsst tsts tsui tsup ttbb ttss tttt tubb tubr tubs tubu tudi tudu tuis tuit tuiu tupi tups tupu turb turd turi turp turr turs turt turu tusd tusi tuss tust tuti tuts tutt tutu u-rp ubbi ubid ubii ubir ubis ubit ubud uddi udds udid udir udpd udsd udts uipi uirr uisd uist uits upis uppp uppu upri upsi upup urbi urbs urds urdu urib uris uriu urri ursi urss ursu urts urup urur urus urut usbr usbs usdp usds usdt usip usis uspp usps ussb ussr usss usst ussu ustb usti ustp usts usui usus utid utis utpd utri utti uttu uuri uusi uuuu