-er b-u bbb bbd bbe bbi bbn bbr bbu bdb bdd bde bdi bdr bdu be- beb bed bee bei ben ber beu bi- bib bid bie bii bin bir biu bnb bnd bne bni bnn bnr bnu brb brd bre bri brn brr bru bub bud bue bui bun bur buu dbb dbd dbe dbi dbn dbr dbu ddb ddd dde ddi ddn ddr ddu de- deb ded dee dei den der deu di- dib did die dii din dir diu dnb dnd dne dni dnn dnr drb drd dre dri drn drr dru dub dud due dui dun dur ebb ebd ebe ebi ebn ebr ebu ed- edb edd ede edi edn edr edu eeb eed eee een eer eib eid eie eii ein eir eiu en- enb end ene eni enn enr enu erb erd ere eri ern err eru eu- eub eud eue eui eun eur i-d ibb ibd ibe ibi ibn ibr ibu idb idd ide idi idn idr idu ie- ied iee iei ien ier iib iid iie iii iin iir iiu in- inb ind ine ini inn inr inu ir- irb ird ire iri irn irr iru iu- iub iud iue iui iur n-i nbb nbd nbe nbi nbn nbr nbu ndb ndd nde ndi ndn ndr ndu ne- neb ned nee nei nen ner neu nib nid nie nii nin nir niu nnb nne nni nnn nnu nrb nrd nre nri nrn nrr nru nub nud nue nui nun nur nuu rbb rbd rbe rbi rbn rbr rbu rdb rdd rde rdi rdn rdr rdu re- reb red ree rei ren rer reu rib rid rie rii rin rir rnb rnd rni rnn rnr rnu rrb rrd rri rrn rrr rru rub rud rue rui run rur ruu ubb ube ubi ubn ubr ubu udb udd ude udi udn udr udu ueb ued uee uei uen uer uib uid uie uii uin uir uiu un- unb und une uni unn unr unu ur- urb urd ure uri urn urr uru uue uun uur uuu