bbbb bblb bibb bibi bibl bili bill bilt bilu bily bitt bitu blbt blit blub blut bly- bttb bubb bubi bubu buit buiu bulb buli bull bult bulu but- buti butt buty buyi buyl buyu byil byit bylt byul i-by ibly ibtb ibtl ibuy ibyi iiii iiit iitt ilit ill- illi illt illy ilut iluy itby itil itll itty iuiu iuty libu liii lilb lili lill lilt lilu lily litb liti litl litt litu lity liut liyl liyu llll ltbl ltib luby luit luli lull lulu luti luyi luyt lyit lyly lytt tbil tbit tibi tibu tiit tiiu till tilt tily titi titt titu tiyi tlli ttbb tttt ttul ttyl tubb tubu tuil tuit tuiu tuli tull tulu tuly tuti tutl tutt tutu tuty tuyl tybi tyl- tyll tyti tytt tyty ubbi ubii ubit ubli ubly ulli ully ulti ultt ulul utby util utti uttu uulu uuuu yili yill yilt yiti ylli yubu yuit yuli yulu yutu yuty yuyu yyyy