bbbb bblb bffl bftt bibb bibi bibl biff bifi bili bill bilt birb biri birl birr birt birx bitt bitx bixi blbt blir blit blix bril brit brix brrr btrt bttb ffff ffii ffrr fftf fiff fifi fift fiii fiil fili fill fiti fitt fixt fixx flii flit flix frib fril frit ft-l ftii ftlb ibfi ibri ibtb ibtl ifbb ifil ifit ifrb ifrf ifri iiii iiit iitr iitt ilbx ilir ilit ill- illi illt ilxx iri- iril irix irlb irri irtf irti itif itil itll itrf itri ittf ixil ixxi lblr lbrt libr libx liff lifl lift lifx liii liir lilb lili lill lilt liri lirl lirr lirt litb liti litl litr litt lixi lixt llll lrif lrrr ltbf ltbl ltib lttr lxii lxxi lxxx rbbb rbbr rffl rib- riff rift riif rill riri riti ritl ritt rlif rrif rrrr rtbf rtfb rtlt tbil tbit tbrb tibi tiff tift tiit till tilr tilt tirb tiri tirl tirr titi titt tixt tlli tltx trfr tri- trib trif tril trit trix trtr ttbb ttff tttt txii txtr x-fi xbrl xiii xil- xili xill xixi xlib xlii xlix xxii xxix xxxi xxxx