bbbb bblb bbpr bibb bibi bibl bili bill bilt bilz bipp birb biri birl birr birt bitt bitz bizz blbt blip blir blit bliz bpti bril brit briz brlp brrr btbp btlp btrt bttb bzip bzzt bzzz ibri ibtb ibtl iiii iiit iitr iitt ilir ilit ill- illi illp illt ilpr ipil ippr ipri irbp iri- iril irip irlb irri irti irtp itil itll itri lblr lbrt libr liii liir lilb lili lill lilt lip- lipb lipi lipl lipp liri lirl lirp lirr lirt litb liti litl litr litt litz lizi lizl llll lppl lprp lptb lrrr ltbl ltib lttr lzip lztt pbil pibb pibi piip pil- pili pill pilt pilz pipi pipp piri pirl pirr piti pitr pitt pitz plbr plib plip plit plpp plri pltt ppib ppli pppp pptt pri- prii prlr prri prti prtp prtr ptbl pzzl rbbb rbbr rib- rill rilp ripi ripl ripp ripr ript riri riti ritl ritt ritz rizi rizz rpii rrrr rtlt rttp rzip tbil tbit tbrb tbtp tibi tiit till tilr tilt tip- tipi tipp tipt tirb tiri tirl tirr titi titp titt titz tizi tizz tlli tpir tppp tppr tptp tptr tri- trib tril trip trit triz trpp trtr ttbb tttt tzzt ziip zill zipp ziri zirp ziti zizi zizz zlib zrtp zzzz