bbbb bblb bffl bfpp bftt bibb bibi bibl biff bifi bili bill bilt bipp bitt blbt blip blit bpfl bptf bpti btbp btlp bttb ffff ffii fftf fibp fiff fifi fift fiii fiil fili fill fipp fiti fitt flii flip flit ft-l ftii ftlb ibfi ibtb ibtl ifbb ifil ifit iiii iiit iipf iitt ilit ill- illi illp illt ipil ippf itif itil itll ittf lftp liff lifl lift liii lilb lili lill lilt lip- lipb lipi lipl lipp litb liti litl litt llll lpfp lpft lppl lptb ltbf ltbl ltib pbil pfff pfft pfit pfli pibb pibi piff piip pil- pili pill pilt pipi pipp pitf piti pitt plff plib plif plip plit plpp pltf pltt ppib ppif ppli pppp pptt ptbl tbil tbit tbtp tfpt tftp tibi tiff tift tiit till tilt tip- tipi tipp tipt titi titp titt tlli tppp tptp ttbb ttff tttt