bbb bbe bbi bbl bbn bbx be- beb bee bei bel ben bex bi- bib bie bii bil bin bix blb ble bli bll bln blx bnb bne bni bnl bnn bnx bxb bxi bxl bxn bxx ebb ebe ebi ebl ebn ebx eeb eee eel een eex eib eie eii eil ein eix elb ele eli ell eln elx en- enb ene eni enl enn ex- exe exi exl exx ibb ibe ibi ibl ibn ibx ie- iee iei iel ien iex iib iie iii iil iin iix il- ilb ile ili ill iln ilx in- inb ine ini inl inn inx ixe ixi ixl ixn lbb lbe lbi lbl lbx leb lee lei lel len lex lib lie lii lil lin lix llb lle lli lll lln lnb lne lni lnl lnn lxi lxx n-i nbb nbe nbi nbl nbn nbx ne- neb nee nei nel nen nex nib nie nii nil nin nix nlb nle nli nll nln nlx nnb nne nni nnl nnn nxl xbe xbl xbx xee xel xen xex xie xii xin xix xlb xli xxi xxl xxx