-er bbb bbd bbe bbi bbn bbr bdb bdd bde bdi bdr be- beb bed bee bei ben ber bi- bib bid bie bii bin bir bnb bnd bne bni bnn bnr brb brd bre bri brn brr dbb dbd dbe dbi dbn dbr ddb ddd dde ddi ddn ddr de- deb ded dee dei den der di- dib did die dii din dir dnb dnd dne dni dnn dnr drb drd dre dri drn drr ebb ebd ebe ebi ebn ebr ed- edb edd ede edi edn edr eeb eed eee een eer eib eid eie eii ein eir en- enb end ene eni enn enr erb erd ere eri ern err i-d ibb ibd ibe ibi ibn ibr idb idd ide idi idn idr ie- ied iee iei ien ier iib iid iie iii iin iir in- inb ind ine ini inn inr ir- irb ird ire iri irn irr n-i nbb nbd nbe nbi nbn nbr ndb ndd nde ndi ndn ndr ne- neb ned nee nei nen ner nib nid nie nii nin nir nnb nne nni nnn nrb nrd nre nri nrn nrr rbb rbd rbe rbi rbn rbr rdb rdd rde rdi rdn rdr re- reb red ree rei ren rer rib rid rie rii rin rir rnb rnd rni rnn rnr rrb rrd rri rrn rrr