b-u bbb bbd bbi bbn bbo bbr bbu bdb bdd bdi bdo bdr bdu bi- bib bid bii bin bio bir biu bnb bnd bni bnn bno bnr bnu bob bod boi bon boo bor bou brb brd bri brn bro brr bru bub bud bui bun buo bur buu dbb dbd dbi dbn dbo dbr dbu ddb ddd ddi ddn ddo ddr ddu di- dib did dii din dio dir diu dnb dnd dni dnn dno dnr dob dod doi don doo dor dou drb drd dri drn dro drr dru dub dud dui dun duo dur i-d ibb ibd ibi ibn ibo ibr ibu idb idd idi idn ido idr idu iib iid iii iin iio iir iiu in- inb ind ini inn ino inr inu io- iob iod ioi ion ioo ior iou ir- irb ird iri irn iro irr iru iu- iub iud iui iur n-i nbb nbd nbi nbn nbo nbr nbu ndb ndd ndi ndn ndo ndr ndu nib nid nii nin nio nir niu nnb nni nnn nno nnu no- nob nod noi non noo nor nou nrb nrd nri nrn nro nrr nru nub nud nui nun nuo nur nuu o-i ob- obb obd obi obn obo obr obu odb odd odi odn odo odr odu oib oid oii oin oio oir oiu on- onb ond oni onn ono onr onu oo- oob ood ooi oon ooo oor or- orb ord ori orn oro orr oru ou- oud oui oun ouo our rbb rbd rbi rbn rbo rbr rbu rdb rdd rdi rdn rdo rdr rdu rib rid rii rin rio rir rnb rnd rni rnn rno rnr rnu rob rod roi ron roo ror rou rrb rrd rri rrn rrr rru rub rud rui run ruo rur ruu ubb ubi ubn ubo ubr ubu udb udd udi udn udo udr udu uib uid uii uin uio uir uiu un- unb und uni unn uno unr unu uob uod uon uoo uor ur- urb urd uri urn uro urr uru uun uur uuu