bbb bbd bbl bbn bbr bbs bdb bdd bdl bdr bds blb bld bll bln blr bls bnb bnd bnl bnn bnr bns brb brd brl brn brr brs bsb bsd bsl bsn bsr bss dbb dbd dbl dbn dbr dbs ddb ddd ddl ddn ddr dds dl- dlb dld dll dlr dls dnb dnd dnl dnn dnr dns drb drd drl drn drr drs dsb dsd dsl dsn dsr dss lbb lbd lbl lbr lbs ldb ldd ldl ldn ldr lds llb lld lll lln llr lls lnb lnd lnl lnn lnr lns lrb lrd lrn lrr lrs lsb lsd lsl lsn lsr lss nbb nbd nbl nbn nbr nbs ndb ndd ndl ndn ndr nds nlb nld nll nln nlr nls nnb nnl nnn nns nrb nrd nrl nrn nrr nrs nsb nsd nsl nsn nsr nss rbb rbd rbl rbn rbr rbs rdb rdd rdl rdn rdr rds rld rll rln rlr rls rnb rnd rnn rnr rns rrb rrd rrl rrn rrr rrs rsb rsd rsl rsn rsr rss sbb sbd sbl sbn sbr sbs sdb sdd sdl sdn sdr sds slb sld sll sln slr sls snb snd snl snn snr sns sr- srb srd srl srn srr srs ss- ssb ssd ssl ssn ssr sss