b-u bbb bbd bbn bbo bbr bbs bbu bdb bdd bdo bdr bds bdu bnb bnd bnn bno bnr bns bnu bob bod bon boo bor bos bou brb brd brn bro brr brs bru bsb bsd bsn bso bsr bss bsu bub bud bun buo bur bus buu dbb dbd dbn dbo dbr dbs dbu ddb ddd ddn ddo ddr dds ddu dnb dnd dnn dno dnr dns dob dod don doo dor dos dou drb drd drn dro drr drs dru dsb dsd dsn dso dsr dss dsu dub dud dun duo dur dus nbb nbd nbn nbo nbr nbs nbu ndb ndd ndn ndo ndr nds ndu nnb nnn nno nns nnu no- nob nod non noo nor nos nou nrb nrd nrn nro nrr nrs nru nsb nsd nsn nso nsr nss nsu nub nud nun nuo nur nus nuu ob- obb obd obn obo obr obs obu odb odd odn odo odr ods odu on- onb ond onn ono onr ons onu oo- oob ood oon ooo oor oos or- orb ord orn oro orr ors oru os- osb osd osn oso osr oss osu ou- oud oun ouo our ous rbb rbd rbn rbo rbr rbs rbu rdb rdd rdn rdo rdr rds rdu rnb rnd rnn rno rnr rns rnu rob rod ron roo ror ros rou rrb rrd rrn rrr rrs rru rsb rsd rsn rso rsr rss rsu rub rud run ruo rur rus ruu sbb sbd sbn sbo sbr sbs sbu sdb sdd sdn sdo sdr sds sdu snb snd snn sno snr sns snu sob sod son soo sor sos sou sr- srb srd srn sro srr srs ss- ssb ssd ssn sso ssr sss ssu sub sud sun suo sur sus suu ubb ubn ubo ubr ubs ubu udb udd udn udo udr uds udu un- unb und unn uno unr uns unu uob uod uon uoo uor uos ur- urb urd urn uro urr urs uru usb usd usn uso usr uss usu uun uur uus uuu