bbbb bbbs bbpr bbrg bggs bgst bibb bibi bibs bigb bigg bigs bigt bigu biis bipp bips bipu birb birg biri birr birs birt biru bis- bisp biss bist bisu bits bitt bitu bpsu bpti brig bris brit brrr brrs brsb brsr brst brug brup brus brut bsgs bspp bspr bsts bsup btbp btps btrt btss bttb btus bubb bubi bubs bubu bugg bugi bugs buir buis buit buiu bups bur- burb burg buri burp burr burs burt buru busi buss bust busu but- buti buts butt buus gbbs ggbt gggg ggss gibb gibs gigg gigi gigs giis gipi gipp gips girg giri girr girs girt giru giss gist gits giur gius gpgp gpip gprp gprs gpsg gpsi gpss grbr grib grig grip gris grit grps grrr grrs grss grub grug grui grur grus grut gsis gspt gstr gsur gtbr gtip gubb gubi gubs gubu gugb gugg gugi gugu guib guis gups gurb gurg guri gurr gurs gurt guru gusb guss gust guti guts gutt gutu guus ibis ibri ibss ibtb ibts ibus iggs igis igri igsp igus iiii iiis iiit iirs iisi iisp iisr iist iisu iitr iitt ippr ipri ipsi ipsp ipss ipts ipur ipus iput irbp irgs iri- irig irip iris irps irri irrs irsg irsp irti irtp irts irus isbt isis isit ispr isps isrg isri isrp issi issp issr isss issu isti istp istr ists isup isus itbs itgs itis itri itrs itsi itsp itsu itup itur iugs iuiu iupp iuss iust pbrs pbsp pgib pgpu pgss pgup pibb pibi pigb pigg pigp pigs pigt pigu piip pipi pipp pips pirg piri pirr pirs piru pisg pisi piss pist pisu piti pitr pits pitt pitu pius ppgi ppib ppig pppp ppps ppru ppss ppts pptt ppur prbs prgs pri- prig prii pris prps prri prrs prsi prss prti prtp prtr prus prut pruu psbr psbt psgi psgr psip psis pspi pspp pspr psps psrp psst psts pstu ptgs ptui pubs pubu pugs pugu puig puir puis puit puiu pupi pups pupu pur- purb purg puri purp purr purs puru pusi puss pust put- puti puts putt putu rbbb rbbr rbbs rbis rbsp rbss rbst rgbi rgit rgtr rgts rib- ribs ribu rigg rigi rigs rigu riis ripi ripp ripr rips ript riri rirs risi risp riss rist risu riti rits ritt ritu rius rpgs rpii rpps rpts rrrr rrsp rsbi rsgb rsis rspb rsps rstp rsts rstu rtgs rtps rtss rttp rtts rubb rubi rubp rubs rubu rugg rugi rugs ruis ruit rupp rupt ruri rurp rurs ruru rusi russ rust rusu ruti ruts rutt rutu s-ib s-ii sbbs sbig sbsi sbsp sbst sbus sggg sggs sgps sgss sgts sibi sibs sibu sigg sigi sigs siit sipi sipp sips sipt siri sirp sirr sirs sirt siru sisi siss sist sisu sit- siti sits sitt situ siui sius siut spgb spgt spib spig spip spir spis spit spps spri sprs spsp spss spst sptb sptr spts spug spui spur spus sput srgb srib sris srps srpt srsp srtp srtr srub ssbr ssgs ssgt ssis ssit ssps sspt ssrg ssri ssrs sssb sssi ssss sstb sstp ssts stbs stgr stib stig stip stir stis stit stpp stps stri strs stru stsi stss sttr stub stug stup stur stus stut sub- subb subg subi subs sug- sugg sugi suig suir suis suit sup- supp supr sups supt sur- surg suri surp surr surs surt suru sus- susi susp suss sust susu suti sutu suus tbbs tbgs tbit tbrb tbsp tbst tbtp tgts tibi tibs tibu tigi tigr tigs tiit tiiu tip- tipi tipp tips tipt tipu tirb tiri tirr tirs tiru tisb tisi tiss tist titi titp tits titt titu tpbg tpir tppp tppr tprs tptp tptr tput tri- trib trig trip tris trit trpg trpp trps trsi trst trtr trub trug trus trut truu tsgt tsig tsis tsps tspt tssg tssi tssr tsst tsts tsui tsup ttbb ttss tttt tubb tubr tubs tubu tugg tugs tugu tuig tuis tuit tuiu tupi tups tupu turb turg turi turp turr turs turt turu tusi tuss tust tuti tuts tutt tutu u-rp ubbi ubii ubir ubis ubit uggs uggt ugis ugri ugur uguu uipi uirr uist uits upis uppp uppu upri upsi upup urbi urbs urgi urgu urib uris uriu urri ursi urss ursu urts urup urur urus urut usbr usbs usgp usip usis uspp usps ussb ussr usss usst ussu ustb usti ustp usts usui usus utis utri utti uttu utug uuri uusi uuuu