bbb bbf bbi bbl bbn bbr bbs bfb bff bfi bfl bfn bfr bfs bi- bib bif bii bil bin bir bis blb blf bli bll bln blr bls bnb bnf bni bnl bnn bnr bns brb brf bri brl brn brr brs bsb bsf bsi bsl bsn bsr bss fbb fbf fbi fbl fbn fbr fbs fff ffi ffl ffn ffr ffs fib fif fii fil fin fir fis flb flf fli fll fln flr fls fnb fnf fni fnl fnn fnr fns frb frf fri frl frn frr frs fsb fsf fsi fsl fsn fsr fss i-f ibb ibf ibi ibl ibn ibr ibs ifb iff ifi ifl ifn ifr ifs iib iif iii iil iin iir iis il- ilb ilf ili ill iln ilr ils in- inb inf ini inl inn inr ins ir- irb irf iri irl irn irr irs is- isb isf isi isl isn isr iss lbb lbf lbi lbl lbr lbs lfb lff lfi lfl lfn lfr lfs lib lif lii lil lin lir lis llb llf lli lll lln llr lls lnb lni lnl lnn lnr lns lrb lrf lri lrn lrr lrs lsb lsf lsi lsl lsn lsr lss n-i nbb nbf nbi nbl nbn nbr nbs nfb nff nfi nfl nfn nfr nfs nib nif nii nil nin nir nis nlb nlf nli nll nln nlr nls nnb nnf nni nnl nnn nns nrb nrf nri nrl nrn nrr nrs nsb nsf nsi nsl nsn nsr nss rbb rbf rbi rbl rbn rbr rbs rfb rff rfi rfl rfn rfr rfs rib rif rii ril rin rir ris rlf rli rll rln rlr rls rnb rni rnn rnr rns rrb rrf rri rrl rrn rrr rrs rsb rsf rsi rsl rsn rsr rss sbb sbf sbi sbl sbn sbr sbs sfb sff sfi sfl sfn sfr sfs sib sif sii sil sin sir sis slb slf sli sll sln slr sls snb snf sni snl snn snr sns sr- srb srf sri srl srn srr srs ss- ssb ssf ssi ssl ssn ssr sss