bbb bbd bbf bbn bbo bbr bdb bdd bdf bdo bdr bfb bfd bff bfn bfo bfr bnb bnd bnf bnn bno bnr bob bod bof bon boo bor brb brd brf brn bro brr dbb dbd dbf dbn dbo dbr ddb ddd ddf ddn ddo ddr dfb dfd dff dfn dfo dfr dnb dnd dnf dnn dno dnr dob dod dof don doo dor drb drd drn dro drr fbb fbd fbf fbn fbo fbr fdb fdd fdf fdn fdo fdr ffd fff ffn ffo ffr fnb fnd fnf fnn fnr fob fof fon foo for frb frd frf frn fro frr nbb nbd nbf nbn nbo nbr ndb ndd ndf ndn ndo ndr nfb nfd nff nfn nfo nfr nnb nnf nnn nno no- nob nod nof non noo nor nrb nrd nrf nrn nro nrr ob- obb obd obf obn obo obr odb odd odf odn odo odr of- ofb ofd off ofn ofo ofr on- onb ond onf onn ono onr oo- oob ood oof oon ooo oor or- orb ord orf orn oro orr rbb rbd rbf rbn rbo rbr rdb rdd rdf rdn rdo rdr rfb rfd rff rfn rfo rfr rnb rnd rnn rno rnr rob rod rof ron roo ror rrb rrd rrf rrn rrr