-ol bbb bbd bbl bbn bbo bbs bdb bdd bdl bdo bds blb bld bll bln blo bls bnb bnd bnl bnn bno bns bob bod bol bon boo bos bsb bsd bsl bsn bso bss dbb dbd dbl dbn dbo dbs ddb ddd ddl ddn ddo dds dl- dlb dld dll dlo dls dnb dnd dnl dnn dno dns dob dod dol don doo dos dsb dsd dsl dsn dso dss lbb lbd lbl lbo lbs ldb ldd ldl ldn ldo lds llb lld lll lln llo lls lnb lnd lnl lnn lno lns lob lod lol lon loo los lsb lsd lsl lsn lso lss nbb nbd nbl nbn nbo nbs ndb ndd ndl ndn ndo nds nlb nld nll nln nlo nls nnb nnl nnn nno nns no- nob nod nol non noo nos nsb nsd nsl nsn nso nss ob- obb obd obl obn obo obs odb odd odl odn odo ods olb old oll oln olo ols on- onb ond onl onn ono ons oo- oob ood ool oon ooo oos os- osb osd osl osn oso oss sbb sbd sbl sbn sbo sbs sdb sdd sdl sdn sdo sds slb sld sll sln slo sls snb snd snl snn sno sns sob sod sol son soo sos ss- ssb ssd ssl ssn sso sss