-ing bbbb bbbs bbin bbng bggs bgst bibb bibi bibs bigb bigg bign bigs bigt biin biis bin- bing bini binn bins bint bis- biss bist bits bitt bnib bnin bnss bsgs bsin bsns bsts btss bttb gbbs ggbt gggg ggss gibb gibs gigg gigi gign gigs giis ging gini ginn gins giss gist gits gnib gnin gnit gnti gsis ibis ibns ibsn ibss ibtb ibts iggs igis igni igns iiii iiis iiit iisi iist iitt ings inig inis init inni inns inss inst intg inti intn ints isbn isbt isin isis isit isnt issi isss isti ists itbs itgs itin itis itsi n-ii nbti ngns ngsn ngtn ngts nibi nibs nigg nigs nigt niit ning nini nins nisi niss nist nitb niti nits nngn nnit nnnn nnss nntn nsin nsis nssb nsss nsts ntis ntsb ntss s-ib s-ii sbbs sbig sbsi sbst sbtn sggg sggs sgss sgts sibi sibs sigg sigi sign sigs siit sing sini sinn sins sint sisi siss sist sit- siti sitn sits sitt snib snig snit snns ssbn ssgs ssgt ssin ssis ssit ssns sssb sssi ssss sstb ssts stbs stib stig stis stit stng stnn stns stsi stss tbbs tbgs tbit tbst tgts tibi tibs tigi tigs tiit ting tini tinn tins tint tisb tisi tiss tist titi tits titt tngs tnts tsgt tsig tsin tsis tssg tssi tsst tsts ttbb ttss tttt