-ing bbbb bbbs bbin bbng bbpr bbrg bggs bgst bgun bibb bibi bibs bigb bigg bign bigs bigt bigu biin biis bin- bing bini binn bins bint binu bipp bips bipu birb birg biri birn birr birs birt biru bis- bisp biss bist bisu bits bitt bitu bnib bnin bnpp bnrr bnss bpsu bpti brig brin bris brit brns brrr brrs brsb brsr brst brug brun brup brus brut bsgs bsin bsns bspp bspr bsts bsup btbp btps btrt btss bttb btus bubb bubi bubs bubu bugg bugi bugs buin buir buis buit buiu bunb bung buni bunn buns bunt bunu bups bur- burb burg buri burn burp burr burs burt buru busi buss bust busu but- buti buts butt buus gbbs ggbt gggg ggrn ggss gibb gibs gigg gigi gign gigs giis ging gini ginn gins ginu gipi gipp gips girg giri girn girr girs girt giru giss gist gits giur gius gnib gnin gnip gnit gnps gnrr gnti gntp gnus gpgp gpip gprp gprs gpsg gpsi gpss grbr grib grig grin grip gris grit grni grps grrr grrs grss grub grug grui grun grur grus grut gsis gspt gstr gsur gtbr gtip gubb gubi gubs gubu gugb gugg gugi gugu guib guin guis gung gunn guns gunt gups gurb gurg guri gurn gurr gurs gurt guru gusb guss gust guti guts gutt gutu guus ibis ibns ibri ibsn ibss ibtb ibts ibus iggs igis igni igns ignu igri igsp igus iiii iiis iiit iirs iisi iisp iisr iist iisu iitr iitt ings inig inis init inni innr inns innu inp- inpi inpp inpt inri inrs insp inss inst insu intg inti intn intp intr ints intu inui inun inup inus ipin ippr ipri ipsi ipsp ipss ipts ipur ipus iput irbp irgs iri- irig irin irip iris irps irri irrs irsg irsp irti irtp irts irun irus isbn isbt isin isis isit isnt ispr isps isrg isri isrp issi issp issr isss issu isti istp istr ists isup isus itbs itgs itin itis itri itrs itsi itsp itsu itup itur iugs iuiu iupp iuss iust n-ii n-up nbpp nbps nbsp nbti ngns ngri ngsn ngtn ngts ngur nguu nibi nibs nigg nigs nigt niip niir niit niiu ning nini nins nipr nips nipt nirs nirt niru nisi nisp niss nist nisu nitb niti nitr nits niur nngn nnit nnnn nnpi nnpr nnss nntn npin npri nprt npss nptn nrpn nrps nrsp nrts nsin nsis nsnr nspi nsps nssb nssp nssr nsss nstp nsts nstu nsub ntis ntnu ntru ntsb ntss ntsu nttr ntui nubi nubs nugs nuin nuit nung nunn nuns nunt nups nuri nurn nurp nurr nurs nurt nuru nusi nuss nust nusu nuts nutt nutu pbrs pbsp pgib pgpu pgss pgup pibb pibi pigb pigg pign pigp pigs pigt pigu piip ping pini pinn pinp pins pint pinu pipi pipp pips pirg piri pirn pirr pirs piru pisg pisi piss pist pisu piti pitr pits pitt pitu pius pnin pnpp pntr pnup ppgi ppib ppig pppn pppp ppps ppru ppss pptn ppts pptt ppur prbs prgs pri- prig prii prin pris prnp prps prri prrs prsi prss prti prtp prtr prus prut pruu psbr psbt psgi psgr psip psis psni psnr pspi pspp pspr psps psrp psst psts pstu ptgs ptui pubs pubu pugs pugu puig puin puir puis puit puiu pung puns punt punu 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 riin riis ring rinn ripi ripp ripr rips ript riri rirs risi risp riss rist risu riti rits ritt ritu rius rnbr rngs rnin rnnt rnsp rntp rnut rpgs rpii rppn rpps rptn rpts rrrr rrsp rrun rsbi rsgb rsis rsnn rsnr rspb rsps rstp rsts rstu rtgs rtns rtps rtss rttp rtts rubb rubi rubp rubs rubu rugg rugi rugs ruin ruis ruit rung runi runn runs runt rupp rupt ruri rurp rurs ruru rusi russ rust rusu ruti ruts rutt rutu ruun s-ib s-ii sbbs sbig sbsi sbsp sbst sbtn sbus sggg sggs sgps sgss sgts sibi sibs sibu sigg sigi sign sigs siit sing sini sinn sinp sins sint sinu sipi sipp sips sipt siri sirp sirr sirs sirt siru sisi siss sist sisu sit- siti sitn sits sitt situ siui sius siut snib snig snip snir snit snns snpg snpp snrs sntr snub snug snur snus spgb spgt spib spig spin spip spir spis spit spns spps spri sprs spsp spss spst sptb sptr spts spug spui spun spur spus sput srgb srib sris srni srnn srps srpt srsp srtp srtr srub ssbn ssbr ssgs ssgt ssin ssis ssit ssns ssps sspt ssrg ssri ssrs sssb sssi ssss sstb sstp ssts stbs stgr stib stig stip stir stis stit stng stnn stnr stns stpp stps stri strn strs stru stsi stss sttr stub stug stun stup stur stus stut sub- subb subg subi subs sug- sugg sugi suig suin suir suis suit sun- sunb sung suni sunn suns sunt sunu sup- supp supr sups supt sur- surg suri surn 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 ting tini tinn tins tint tinu tip- tipi tipp tips tipt tipu tirb tiri tirr tirs tiru tisb tisi tiss tist titi titp tits titt titu tngs tnsp tnts tnut tpbg tpir tppp tppr tprs tptp tptr tput tri- trib trig trin trip tris trit trng trpg trpn trpp trps trsi trst trtr trub trug trun trus trut truu tsgt tsig tsin tsis tspn tsps tspt tssg tssi tssr tsst tsts tsui tsun tsup ttbb ttss tttt tubb tubr tubs tubu tugg tugs tugu tuig tuin tuis tuit tuiu tunb tung tuni tunn tuns tunu tupi tups tupu turb turg turi turn turp turr turs turt turu tusi tuss tust tuti