-er bbb bbe bbi bbl bbn bbr bbx be- beb bee bei bel ben ber bex bi- bib bie bii bil bin bir bix blb ble bli bll bln blr blx bnb bne bni bnl bnn bnr bnx brb bre bri brl brn brr brx bxb bxi bxl bxn bxx ebb ebe ebi ebl ebn ebr ebx eeb eee eel een eer eex eib eie eii eil ein eir eix elb ele eli ell eln elr elx en- enb ene eni enl enn enr erb ere eri erl ern err ex- exe exi exl exr exx ibb ibe ibi ibl ibn ibr ibx ie- iee iei iel ien ier iex iib iie iii iil iin iir iix il- ilb ile ili ill iln ilr ilx in- inb ine ini inl inn inr inx ir- irb ire iri irl irn irr irx ixe ixi ixl ixn lbb lbe lbi lbl lbr lbx leb lee lei lel len ler lex lib lie lii lil lin lir lix llb lle lli lll lln llr lnb lne lni lnl lnn lnr lrb lri lrn lrr lxi lxr lxx n-i nbb nbe nbi nbl nbn nbr nbx ne- neb nee nei nel nen ner nex nib nie nii nil nin nir nix nlb nle nli nll nln nlr nlx nnb nne nni nnl nnn nrb nre nri nrl nrn nrr nrx nxl rbb rbe rbi rbl rbn rbr rbx re- reb ree rei rel ren rer rex rib rie rii ril rin rir rix rle rli rll rln rlr rnb rni rnn rnr rrb rri rrl rrn rrr rxr xbe xbl xbr xbx xee xel xen xer xex xie xii xin xix xlb xli xlr xrx xxi xxl xxx