bbbb bbbs bbfn bbin bblb bbls bffl bffs bfsi bfsr bibb bibi bibl bibs biff bifi biin biis bili bill bils bin- bini binn bins birb biri birl birn birr birs bis- bisl biss blin blir blis blls blni blss bnib bnin bnrr bnss bril brin bris brls brns brrr brrs brsb brsr bsff bsfs bsin bsns fbis fbrs ffff ffii ffrr ffss fibs fiff fifi fiii fiil fili fill filn fils fini finn fins firn firs fisi fiss flii flin flis flnb fnrs frib fril frin fris frns frsb fsfi fsln fssf ibfi ibis ibns ibri ibsf ibsn ibss ifbb ifil ifis ifni ifnr ifns ifrb ifrf ifri ifsb iiii iiis iirs iisi iisr ilin ilir ilis ill- illi ills ilni infi infl infs inis inni innr inns inri inrs inss iri- iril irin iris irlb irri irrs irsf isbl isbn isil isin isis isls isri issf issi issr isss lblr lbrs libr libs liff lifl liii liin liir liis lilb lili lill lils linn lins liri lirl lirn lirr lirs lisi liss llbs llll lnfs lrif lrrr ls-r lssr n-ii nbfl nfff nfib nfrs nfsr nibi nibs niff niir nili nill nils nini ninl nins nirs nisi nisl niss nlls nlrb nnls nnnn nnsl nnss nrlb nrrl nsfs nsin nsis nslr nsls nsnr nsrl nssb nssf nssr nsss rbbb rbbr rbbs rbis rbsl rbss rffl rib- ribs riff rifs riif riin riis rill rinf rinn riri rirs risi riss rlif rlin rlls rnbr rnin rnli rrif rrrr rsbi rsis rsnn rsnr rssl s-ib s-ii sbbs sbsi sfls sfnb sfss sibi sibs siff sifl sifr sil- silf sili sill sils sini sinn sins sirf siri sirr sirs sisi siss sl-i slib slir slln slrn slrs snib snir snlf snns snrs srfi srib sris srni srnn ssbn ssbr ssfl ssin ssis ssns ssri ssrl ssrs sssb sssf sssi ssss