bbbb bbbs bbdd bbpr bd-r bdii bdsd bduf bffs bfpp bfsi bfsr bibb bibi bibs bidi bidr bids bidu biff bifi biis bipp bips bipu birb bird biri birr birs biru bis- bisd bisp biss bisu bprd bpsu brds brfu brid bris brrr brrs brsb brsr brud brup brus bsbd bsff bsfs bspp bspr bsrd bssd bsup bubb bubi bubs bubu budb budd budi buds budu buff bufr buid buif buir buis buiu bups bur- burb burd buri burp burr burs buru busi buss busu buus dbfs dbpd dbpf dbrs dbss dbus dddd ddps ddss ddub dfds dfrf dfri dibb dibp dibs didi dids didu dif- diff difs diii diis dipp dips dipu dird dirr dirs dis- disd disi disp diss dius dpsd dpsu drib drif drip drrs drsp drub drui drup drus druu dsdp dsdr dsif dsip dspf dsps dsri dsrp dsrr dssi dssp dub- dubb dubs dubu dudd duds dudu duff dufu duid duif duir duis duri duru dusi duur fbis fbrs fbsd fbus ffff ffii ffps ffrr ffss fibp fibs fidf fids fiff fifi fiii fipp fips firs fisd fisi fiss fisu fprf frib frid frip fris frpd frps frsb frub fsfi fspf fssf fssp fubb fubs fubu fudd fudi fuff fufu fuid fuir fur- furi furr furs fusd fusi fuss fusu ibfi ibid ibis ibrd ibri ibsf ibss ibus idfp idid idir idis idps idrf idsf idss idub idus ifbb ifid ifis ifps ifrb ifrf ifri ifsb ifsp iiii iiis iipf iirs iisd iisi iisp iisr iisu ipdi ipid ippf ippr ipri ipsi ipsp ipss ipur ipus irbp irdp irds irfu iri- irid irip iris irps irri irrs irsf irsp irus isbd isdb isds isfp isis ispf ispr isps isri isrp issf issi issp issr isss issu isup isus iuds iuiu iupp iusd iuss pbrf pbrs pbsp pdbs pdfs pdpr pdrs pdsd pdss pfff pffr pfis pfps pfui pibb pibi pids piff pifs piip pipi pipp pips piri pirr pirs piru pisd pisi piss pisu pius ppds ppib ppid ppif pppd pppp ppps pprf ppru ppsf ppss ppur prbs prfs pri- prid prif prii pris prpd prps prrd prri prrs prsd prsi prss prud pruf prus pruu psbd psbr psdi psdp psdr psds psfs psid psip psis pspi pspp pspr psps psrd psrp pubs pubu puds pudu puff puid puir puis puiu pupi pups pupu pur- purb puri purp purr purs puru pusd pusi puss rbbb rbbr rbbs rbds rbis rbsd rbsp rbss rdbp rfdi rfds rfid rib- ribs ribu ridd ridi rids riff rifs rifu riif riis ripd ripi ripp ripr rips riri rirs risd risi risp riss risu rius rpdp rpii rpps rrif rrrr rrsp rsbi rsdd rsds rsid rsis rspb rsps rubb rubi rubp rubs rubu rudd rudi rudp ruds ruff ruid ruif ruis rupp rurd ruri rurp rurs ruru rusi russ rusu ruud s-ib s-ii sbbs sbds sbsd sbsi sbsp sbus sdds sdib sdif sdpr sdps sdrs sdsf sdss sdsu sfpd sfss sfsu sibi sibs sibu sidd sidi sidr sids siff sifr sifu sipi sipp sips sirf siri sirp sirr sirs siru sisd sisi siss sisu siui sius spdf spdp spdr spfs spib spip spir spis sppd sppf spps sprd spri sprs spsd spsp spss spud spui spur spus srfi srib sris srps srsd srsp srub ssbr ssdd ssdf ssdp ssfp ssid ssis sspf ssps ssri ssrs sssb sssf sssi ssss sub- subb subd subi subs sudd sudi suds suf- suff sufi sufr sufs sufu suid suir suis sup- supp supr sups sur- surd surf suri surp surr surs suru sus- susd susi susp suss susu suus u-rp ubbi ubid ubii ubir ubis ubud uddi udds udid udir udpd udsd ufip ufpb uipi uirr uisd updf upis uppp uppu upri upsi upup urbi urbs urds urdu urff urfi urib urif uris uriu urri ursi urss ursu urup urur urus usbr usbs usdf usdp usds usfi usfs usif usip usis uspp usps ussb ussf ussr usss ussu usui usus uuri uusi uuuu