bbbb bbbs bbin bblb bbls bibb bibi bibl bibs biin biis bili bill bils bilu bin- bini binn bins binu bis- bisl biss bisu blin blis blls blni blss blub blus bnib bnin bnss bsin bsns bubb bubi bubs bubu buin buis buiu bulb buli bull buls bulu bunb buni bunn buns bunu busi buss busu buus ibis ibns ibsn ibss ibus iiii iiis iisi iisu ilin ilis ill- illi ills ilni ilus inis inni inns innu inss insu inui inul inun inus isbl isbn isil isin isis isls issi isss issu isus iuiu iuss libs libu liii liin liis lilb lili lill lils lilu linn lins lisi liss lisu liun lius llbs llll lsbu lubs luin luis luli lull lulu luni lunn luns lusi luss n-ii nibi nibs niiu nili nill nils nilu nini ninl nins nisi nisl niss nisu nlls nnls nnnn nnsl nnss nsin nsis nsls nssb nsss nsub nubi nubl nubs nuin nuli null nunn nuns nusi nusl nuss nusu s-ib s-ii sbbs sbsi sbus sibi sibs sibu sil- sili sill sils silu sini sinn sins sinu sisi siss sisu siui sius sl-i slib slln slsu slub snib snns snub snus ssbn ssin ssis ssns sssb sssi ssss sub- subb subi subl subs suin suis sul- suli sull sulu sun- sunb suni sunn suns sunu sus- susi suss susu suus ubbi ubii ubis ubli ubls ulli ulul ulus uni- unii unin unis unni unns uns- unus usbl usbs usin usis uslu usnu ussb usss ussu usui usul usun usus uulu uuni uusi uuuu