bbbb bbin bblb bibb bibi bibl biin bili bill bilt bilu bin- bini binn bint binu bitt bitu blbt blin blit blni blub blut bnib bnin bttb bubb bubi bubu buin buit buiu bulb buli bull bult bulu bunb buni bunn bunt bunu but- buti butt ibtb ibtl iiii iiit iitt ilin ilit ill- illi illt ilni ilut init inni innu inti intl intn intu inui inul inun itil itin itll iuiu libu liii liin lilb lili lill lilt lilu linn lint litb liti litl litt litu liun liut llll ltbl ltib ltnt luin luit luli lull lulu luni lunn lunt luti n-ii nbti nibi niit niiu nili nill nilt nilu nini ninl nitb niti nnit nnnn nntn ntnu ntui nubi nubl nuin nuit nuli null nunn nunt nutt nutu tbil tbit tibi tibu tiit tiiu till tiln tilt tini tinn tint tinu titi titt titu tlli tnut ttbb tttt ttul tubb tubu tuil tuin tuit tuiu tuli tull tulu tunb tuni tunn tunu tuti tutl tutt tutu ubbi ubii ubit ubli uint ulli ulti ultt ulul uni- unii unin unit unni untb unut util utin utti uttu uulu uuni uuuu