b-u bbb bbd bbf bbi bbn bbo bbr bbu bdb bdd bdf bdi bdo bdr bdu bfb bfd bff bfi bfn bfo bfr bfu bi- bib bid bif bii bin bio bir biu bnb bnd bnf bni bnn bno bnr bnu bob bod bof boi bon boo bor bou brb brd brf bri brn bro brr bru bub bud buf bui bun buo bur buu dbb dbd dbf dbi dbn dbo dbr dbu ddb ddd ddf ddi ddn ddo ddr ddu dfb dfd dff dfi dfn dfo dfr dfu di- dib did dif dii din dio dir diu dnb dnd dnf dni dnn dno dnr dob dod dof doi don doo dor dou drb drd dri drn dro drr dru dub dud duf dui dun duo dur fbb fbd fbf fbi fbn fbo fbr fbu fdb fdd fdf fdi fdn fdo fdr fdu ffd fff ffi ffn ffo ffr ffu fib fid fif fii fin fir fiu fnb fnd fnf fni fnn fnr fnu fob fof foi fon foo for fou frb frd frf fri frn fro frr fru fub fud fuf fui fun fuo fur fuu i-d i-f ibb ibd ibf ibi ibn ibo ibr ibu idb idd idf idi idn ido idr idu ifb ifd iff ifi ifn ifo ifr ifu iib iid iif iii iin iio iir iiu in- inb ind inf ini inn ino inr inu io- iob iod iof ioi ion ioo ior iou ir- irb ird irf iri irn iro irr iru iu- iub iud iui iur n-i nbb nbd nbf nbi nbn nbo nbr nbu ndb ndd ndf ndi ndn ndo ndr ndu nfb nfd nff nfi nfn nfo nfr nfu nib nid nif nii nin nio nir niu nnb nnf nni nnn nno nnu no- nob nod nof noi non noo nor nou nrb nrd nrf nri nrn nro nrr nru nub nud nui nun nuo nur nuu o-i ob- obb obd obf obi obn obo obr obu odb odd odf odi odn odo odr odu of- ofb ofd off ofi ofn ofo ofr ofu oib oid oif oii oin oio oir oiu on- onb ond onf oni onn ono onr onu oo- oob ood oof ooi oon ooo oor or- orb ord orf ori orn oro orr oru ou- oud ouf oui oun ouo our rbb rbd rbf rbi rbn rbo rbr rbu rdb rdd rdf rdi rdn rdo rdr rdu rfb rfd rff rfi rfn rfo rfr rfu rib rid rif rii rin rio rir rnb rnd rni rnn rno rnr rnu rob rod rof roi ron roo ror rou rrb rrd rrf rri rrn rrr rru rub rud ruf rui run ruo rur ruu ubb ubf ubi ubn ubo ubr ubu udb udd udf udi udn udo udr udu ufd uff ufi ufn ufo ufr ufu uib uid uif uii uin uio uir uiu un- unb und unf uni unn uno unr unu uob uod uon uoo uor ur- urb urd urf uri urn uro urr uru uun uur uuu