-ing bbbb bbbs bbin bbng bbpr bbrg bggs bgun bibb bibi bibs bigb bigg bign bigs bigu biin biis bin- bing bini binn bins binu bipp bips bipu birb birg biri birn birr birs biru bis- bisp biss bisu bnib bnin bnpp bnrr bnss bpsu brig brin bris brns brrr brrs brsb brsr brug brun brup brus bsgs bsin bsns bspp bspr bsup bubb bubi bubs bubu bugg bugi bugs buin buir buis buiu bunb bung buni bunn buns bunu bups bur- burb burg buri burn burp burr burs buru busi buss busu buus gbbs gggg ggrn ggss gibb gibs gigg gigi gign gigs giis ging gini ginn gins ginu gipi gipp gips girg giri girn girr girs giru giss giur gius gnib gnin gnip gnps gnrr gnus gpgp gpip gprp gprs gpsg gpsi gpss grbr grib grig grin grip gris grni grps grrr grrs grss grub grug grui grun grur grus gsis gsur gubb gubi gubs gubu gugb gugg gugi gugu guib guin guis gung gunn guns gups gurb gurg guri gurn gurr gurs guru gusb guss guus ibis ibns ibri ibsn ibss ibus iggs igis igni igns ignu igri igsp igus iiii iiis iirs iisi iisp iisr iisu ings inig inis inni innr inns innu inp- inpi inpp inri inrs insp inss insu inui inun inup inus ipin ippr ipri ipsi ipsp ipss ipur ipus irbp irgs iri- irig irin irip iris irps irri irrs irsg irsp irun irus isbn isin isis ispr isps isrg isri isrp issi issp issr isss issu isup isus iugs iuiu iupp iuss n-ii n-up nbpp nbps nbsp ngns ngri ngsn ngur nguu nibi nibs nigg nigs niip niir niiu ning nini nins nipr nips nirs niru nisi nisp niss nisu niur nngn nnnn nnpi nnpr nnss npin npri npss nrpn nrps nrsp nsin nsis nsnr nspi nsps nssb nssp nssr nsss nsub nubi nubs nugs nuin nung nunn nuns nups nuri nurn nurp nurr nurs nuru nusi nuss nusu pbrs pbsp pgib pgpu pgss pgup pibb pibi pigb pigg pign pigp pigs pigu piip ping pini pinn pinp pins pinu pipi pipp pips pirg piri pirn pirr pirs piru pisg pisi piss pisu pius pnin pnpp pnup ppgi ppib ppig pppn pppp ppps ppru ppss ppur prbs prgs pri- prig prii prin pris prnp prps prri prrs prsi prss prus pruu psbr psgi psgr psip psis psni psnr pspi pspp pspr psps psrp pubs pubu pugs pugu puig puin puir puis puiu pung puns punu pupi pups pupu pur- purb purg puri purp purr purs puru pusi puss rbbb rbbr rbbs rbis rbsp rbss rgbi rib- ribs ribu rigg rigi rigs rigu riin riis ring rinn ripi ripp ripr rips riri rirs risi risp riss risu rius rnbr rngs rnin rnsp rpgs rpii rppn rpps rrrr rrsp rrun rsbi rsgb rsis rsnn rsnr rspb rsps rubb rubi rubp rubs rubu rugg rugi rugs ruin ruis rung runi runn runs rupp ruri rurp rurs ruru rusi russ rusu ruun s-ib s-ii sbbs sbig sbsi sbsp sbus sggg sggs sgps sgss sibi sibs sibu sigg sigi sign sigs sing sini sinn sinp sins sinu sipi sipp sips siri sirp sirr sirs siru sisi siss sisu siui sius snib snig snip snir snns snpg snpp snrs snub snug snur snus spgb spib spig spin spip spir spis spns spps spri sprs spsp spss spug spui spun spur spus srgb srib sris srni srnn srps srsp srub ssbn ssbr ssgs ssin ssis ssns ssps ssrg ssri ssrs sssb sssi ssss sub- subb subg subi subs sug- sugg sugi suig suin suir suis sun- sunb sung suni sunn suns sunu sup- supp supr sups sur- surg suri surn surp surr surs suru sus- susi susp suss susu suus u-rp ubbi ubii ubir ubis uggs ugis ugni ugri ugur uguu uipi uirr ungp ungu uni- unii unin unir unis unni unns unps unrs uns- unsg unus upin upis upnp uppp uppu upri upsi upup urbi urbs urgi urgu urib urin uris uriu urni urns urri ursi urss ursu urun urup urur urus usbr usbs usgp usin usip usis usnr usnu uspp usps ussb ussr usss ussu usui usun usus uuni uuri uusi uuuu