-ing bbbb bbbs bbin bbng bggs bgst bgun bibb bibi bibs bigb bigg bign bigs bigt bigu biin biis bin- bing bini binn bins bint binu bis- biss bist bisu bits bitt bitu bnib bnin bnss bsgs bsin bsns bsts btss bttb btus bubb bubi bubs bubu bugg bugi bugs buin buis buit buiu bunb bung buni bunn buns bunt bunu busi buss bust busu but- buti buts butt buus gbbs ggbt gggg ggss gibb gibs gigg gigi gign gigs giis ging gini ginn gins ginu giss gist gits gius gnib gnin gnit gnti gnus gsis gubb gubi gubs gubu gugb gugg gugi gugu guib guin guis gung gunn guns gunt gusb guss gust guti guts gutt gutu guus ibis ibns ibsn ibss ibtb ibts ibus iggs igis igni igns ignu igus iiii iiis iiit iisi iist iisu iitt ings inig inis init inni inns innu inss inst insu intg inti intn ints intu inui inun inus isbn isbt isin isis isit isnt issi isss issu isti ists isus itbs itgs itin itis itsi itsu iugs iuiu iuss iust n-ii nbti ngns ngsn ngtn ngts nguu nibi nibs nigg nigs nigt niit niiu ning nini nins nisi niss nist nisu nitb niti nits nngn nnit nnnn nnss nntn nsin nsis nssb nsss nsts nstu nsub ntis ntnu ntsb ntss ntsu ntui nubi nubs nugs nuin nuit nung nunn nuns nunt nusi nuss nust nusu nuts nutt nutu s-ib s-ii sbbs sbig sbsi sbst sbtn sbus sggg sggs sgss sgts sibi sibs sibu sigg sigi sign sigs siit sing sini sinn sins sint sinu sisi siss sist sisu sit- siti sitn sits sitt situ siui sius siut snib snig snit snns snub snug snus ssbn ssgs ssgt ssin ssis ssit ssns sssb sssi ssss sstb ssts stbs stib stig stis stit stng stnn stns stsi stss stub stug stun stus stut sub- subb subg subi subs sug- sugg sugi suig suin suis suit sun- sunb sung suni sunn suns sunt sunu sus- susi suss sust susu suti sutu suus tbbs tbgs tbit tbst tgts tibi tibs tibu tigi tigs tiit tiiu ting tini tinn tins tint tinu tisb tisi tiss tist titi tits titt titu tngs tnts tnut tsgt tsig tsin tsis tssg tssi tsst tsts tsui tsun ttbb ttss tttt tubb tubs tubu tugg tugs tugu tuig tuin tuis tuit tuiu tunb tung tuni tunn tuns tunu tusi tuss tust tuti tuts tutt tutu ubbi ubii ubis ubit uggs uggt ugis ugni uguu uint uist uits ungu uni- unii unin unis unit unni unns uns- unsg unst untb unts unus unut usbs usin usis usnu ussb usss usst ussu ustb usti usts usui usun usus utin utis utti uttu utug uuni uusi uuuu