bbbb bblb bibb bibi bibl bili bill bilt bilu bily bipp bipu bitt bitu blbt blip blit blub blup blut bly- bpti btbp btlp 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 illp illt illy ilut iluy ipil ippy iput itby itil itll itty itup iuiu iupp iuty iypt libu liii lilb lili lill lilt lilu lily lip- lipb lipi lipl lipp lipu lipy litb liti litl litt litu lity liut liyl liyu llll lppl lptb ltbl ltib luby luit luli lull lulu lupi lupu luti luup luyi luyt lyit lyly lytt pbil pblu pibb pibi piip pil- pili pill pilt pilu pily pipi pipp pipy piti pitt pitu pity plib plip plit plpp pltt plup plyt ppib ppli pppp pptt ptbl ptui publ pubu puit puiu puli pull pulp pult pulu puly pupi pupl pupu pupy put- puti putt putu puy- puyi puyt pyl- pyli pyll pypy pytt tbil tbit tbtp tibi tibu tiit tiiu till tilt tily tip- tipi tipp tipt tipu titi titp titt titu tiyi tlli tppp tptp tput ttbb tttt ttul ttyl tubb tubu tuil tuit tuiu tuli tull tulp tulu tuly tupi tupu tupy tuti tutl tutt tutu tuty tuyl tybi tyl- tyll typ- typp typy tyti tytt tyty tyup ubbi ubii ubit ubli ubly uipi ulli ully ulti ultt ulul upby uplb uppp uppu uppy uptl upup utby util utti uttu uulu uuuu yili yill yilt yiti yitp ylli yput yubu yuit yuli yulu yupi yutu yuty yuyu yyyy