bbb bbd bbl bbn bbs bdb bdd bdl bds blb bld bll bln bls bnb bnd bnl bnn bns bsb bsd bsl bsn bss dbb dbd dbl dbn dbs ddb ddd ddl ddn dds dl- dlb dld dll dls dnb dnd dnl dnn dns dsb dsd dsl dsn dss lbb lbd lbl lbs ldb ldd ldl ldn lds llb lld lll lln lls lnb lnd lnl lnn lns lsb lsd lsl lsn lss nbb nbd nbl nbn nbs ndb ndd ndl ndn nds nlb nld nll nln nls nnb nnl nnn nns nsb nsd nsl nsn nss sbb sbd sbl sbn sbs sdb sdd sdl sdn sds slb sld sll sln sls snb snd snl snn sns ss- ssb ssd ssl ssn sss