-ing bbbb bbbs bbin bbng bbrg bggs bgun bibb bibi bibs bigb bigg bign bigs bigu biin biis bin- bing bini binn bins binu birb birg biri birn birr birs biru bis- biss bisu bnib bnin bnrr bnss brig brin bris brns brrr brrs brsb brsr brug brun brus bsgs bsin bsns bubb bubi bubs bubu bugg bugi bugs buin buir buis buiu bunb bung buni bunn buns bunu bur- burb burg buri burn burr burs buru busi buss busu buus gbbs gggg ggrn ggss gibb gibs gigg gigi gign gigs giis ging gini ginn gins ginu girg giri girn girr girs giru giss giur gius gnib gnin gnrr gnus grbr grib grig grin gris grni 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 gurb gurg guri gurn gurr gurs guru gusb guss guus ibis ibns ibri ibsn ibss ibus iggs igis igni igns ignu igri igus iiii iiis iirs iisi iisr iisu ings inig inis inni innr inns innu inri inrs inss insu inui inun inus irgs iri- irig irin iris irri irrs irsg irun irus isbn isin isis isrg isri issi issr isss issu isus iugs iuiu iuss n-ii ngns ngri ngsn ngur nguu nibi nibs nigg nigs niir niiu ning nini nins nirs niru nisi niss nisu niur nngn nnnn nnss nsin nsis nsnr nssb nssr nsss nsub nubi nubs nugs nuin nung nunn nuns nuri nurn nurr nurs nuru nusi nuss nusu rbbb rbbr rbbs rbis rbss rgbi rib- ribs ribu rigg rigi rigs rigu riin riis ring rinn riri rirs risi riss risu rius rnbr rngs rnin rrrr rrun rsbi rsgb rsis rsnn rsnr rubb rubi rubs rubu rugg rugi rugs ruin ruis rung runi runn runs ruri rurs ruru rusi russ rusu ruun s-ib s-ii sbbs sbig sbsi sbus sggg sggs sgss sibi sibs sibu sigg sigi sign sigs sing sini sinn sins sinu siri sirr sirs siru sisi siss sisu siui sius snib snig snir snns snrs snub snug snur snus srgb srib sris srni srnn srub ssbn ssbr ssgs ssin ssis ssns 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 sur- surg suri surn surr surs suru sus- susi suss susu suus ubbi ubii ubir ubis uggs ugis ugni ugri ugur uguu uirr ungu uni- unii unin unir unis unni unns unrs uns- unsg unus urbi urbs urgi urgu urib urin uris uriu urni urns urri ursi urss ursu urun urur urus usbr usbs usin usis usnr usnu ussb ussr usss ussu usui usun usus uuni uuri uusi uuuu