bbb bbd bbn bbo bbr bbs bdb bdd bdo bdr bds bnb bnd bnn bno bnr bns bob bod bon boo bor bos brb brd brn bro brr brs bsb bsd bsn bso bsr bss dbb dbd dbn dbo dbr dbs ddb ddd ddn ddo ddr dds dnb dnd dnn dno dnr dns dob dod don doo dor dos drb drd drn dro drr drs dsb dsd dsn dso dsr dss nbb nbd nbn nbo nbr nbs ndb ndd ndn ndo ndr nds nnb nnn nno nns no- nob nod non noo nor nos nrb nrd nrn nro nrr nrs nsb nsd nsn nso nsr nss ob- obb obd obn obo obr obs odb odd odn odo odr ods on- onb ond onn ono onr ons oo- oob ood oon ooo oor oos or- orb ord orn oro orr ors os- osb osd osn oso osr oss rbb rbd rbn rbo rbr rbs rdb rdd rdn rdo rdr rds rnb rnd rnn rno rnr rns rob rod ron roo ror ros rrb rrd rrn rrr rrs rsb rsd rsn rso rsr rss sbb sbd sbn sbo sbr sbs sdb sdd sdn sdo sdr sds snb snd snn sno snr sns sob sod son soo sor sos sr- srb srd srn sro srr srs ss- ssb ssd ssn sso ssr sss