bbb bbf bbi bbl bbn bfb bff bfi bfl bfn bi- bib bif bii bil bin blb blf bli bll bln bnb bnf bni bnl bnn fbb fbf fbi fbl fbn fff ffi ffl ffn fib fif fii fil fin flb flf fli fll fln fnb fnf fni fnl fnn i-f ibb ibf ibi ibl ibn ifb iff ifi ifl ifn iib iif iii iil iin il- ilb ilf ili ill iln in- inb inf ini inl inn lbb lbf lbi lbl lfb lff lfi lfl lfn lib lif lii lil lin llb llf lli lll lln lnb lni lnl lnn n-i nbb nbf nbi nbl nbn nfb nff nfi nfl nfn nib nif nii nil nin nlb nlf nli nll nln nnb nnf nni nnl nnn