-ing bbbb bbin bblb bbng bibb bibi bibl bigb bigg bign bigt biin bili bill bilt bin- bing bini binn bint bitt blbt blin blit blni bnib bnin bttb ggbt gggg gibb gigg gigi gign gilg gili gill gilt ging gini ginn gli- glib glin glit gnib gnin gnit gnti ibtb ibtl igil igli igni iiii iiit iitt ilin ilit ill- illi illt ilni inig init inni intg inti intl intn itil itin itll lbgt lgbt lgin lgtn ligg ligi lign liig liii liin lilb lilg lili lill lilt ling linn lint litb liti litl litt llll ltbl ltib ltng ltnt n-ii nbti ngtn nibi nigg nigt niit nili nill nilt ning nini ninl nitb niti nlgn nngn nnit nnnn nntn tbil tbit tibi tigi tiit till tiln tilt ting tini tinn tint titi titt tlli ttbb tttt