bbbb bbfn bbin bblb bffl bibb bibi bibl biff bifi biin bili bill bin- bini binn birb biri birl birn birr blin blir blni bnib bnin bnrr bril brin brrr ffff ffii ffrr fiff fifi fiii fiil fili fill filn fini finn firn flii flin flnb frib fril frin ibfi ibri ifbb ifil ifni ifnr ifrb ifrf ifri iiii ilin ilir ill- illi ilni infi infl inni innr inri iri- iril irin irlb irri lblr libr liff lifl liii liin liir lilb lili lill linn liri lirl lirn lirr llll lrif lrrr n-ii nbfl nfff nfib nibi niff niir nili nill nini ninl nlrb nnnn nrlb nrrl rbbb rbbr rffl rib- riff riif riin rill rinf rinn riri rlif rlin rnbr rnin rnli rrif rrrr