-er b-u bbb bbd bbe bbi bbn bbr bbu bdb bdd bde bdi bdr bdu bdz be- beb bed bee bei ben ber beu bez bi- bib bid bie bii bin bir biu biz bnb bnd bne bni bnn bnr bnu bnz brb brd bre bri brn brr bru brz bub bud bue bui bun bur buu buz bzd bze bzn bzr bzu bzz dbb dbd dbe dbi dbn dbr dbu dbz ddb ddd dde ddi ddn ddr ddu ddz de- deb ded dee dei den der deu dez di- dib did die dii din dir diu diz dnb dnd dne dni dnn dnr dnz drb drd dre dri drn drr dru drz dub dud due dui dun dur duz dzb dzd dze dzi dzr dzu 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 enz erb erd ere eri ern err eru erz eu- eub eud eue eui eun eur eze ezr ezz i-d ibb ibd ibe ibi ibn ibr ibu ibz 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 iuz ize izi izu izz n-i nbb nbd nbe nbi nbn nbr nbu ndb ndd nde ndi ndn ndr ndu ne- neb ned nee nei nen ner neu nez nib nid nie nii nin nir niu niz nnb nne nni nnn nnu nnz nrb nrd nre nri nrn nrr nru nrz nub nud nue nui nun nur nuu nzb nzd nze nzi nzz rbb rbd rbe rbi rbn rbr rbu rdb rdd rde rdi rdn rdr rdu re- reb red ree rei ren rer reu rez rib rid rie rii rin rir riz rnb rnd rni rnn rnr rnu rnz rrb rrd rri rrn rrr rru rub rud rue rui run rur ruu ruz rzb rze 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 urz uue uun uur uuu uzb uzi uzu zbb zbr zeb zed zee zen zer zez zib zid zie zin zir ziz znd zne znn zub zud zui zun zur zuz zzr zzz