-ol bbb bbd bbl bbn bbo bbr bbs bdb bdd bdl bdo bdr bds blb bld bll bln blo blr bls bnb bnd bnl bnn bno bnr bns bob bod bol bon boo bor bos brb brd brl brn bro brr brs bsb bsd bsl bsn bso bsr bss dbb dbd dbl dbn dbo dbr dbs ddb ddd ddl ddn ddo ddr dds dl- dlb dld dll dlo dlr dls dnb dnd dnl dnn dno dnr dns dob dod dol don doo dor dos drb drd drl drn dro drr drs dsb dsd dsl dsn dso dsr dss lbb lbd lbl lbo lbr lbs ldb ldd ldl ldn ldo ldr lds llb lld lll lln llo llr lls lnb lnd lnl lnn lno lnr lns lob lod lol lon loo lor los lrb lrd lrn lro lrr lrs lsb lsd lsl lsn lso lsr lss nbb nbd nbl nbn nbo nbr nbs ndb ndd ndl ndn ndo ndr nds nlb nld nll nln nlo nlr nls nnb nnl nnn nno nns no- nob nod nol non noo nor nos nrb nrd nrl nrn nro nrr nrs nsb nsd nsl nsn nso nsr nss ob- obb obd obl obn obo obr obs odb odd odl odn odo odr ods olb old oll oln olo ols on- onb ond onl onn ono onr ons oo- oob ood ool oon ooo oor oos or- orb ord orl orn oro orr ors os- osb osd osl osn oso osr oss rbb rbd rbl rbn rbo rbr rbs rdb rdd rdl rdn rdo rdr rds rld rll rln rlo rlr rls rnb rnd rnn rno rnr rns rob rod rol ron roo ror ros rrb rrd rrl rrn rrr rrs rsb rsd rsl rsn rso rsr rss sbb sbd sbl sbn sbo sbr sbs sdb sdd sdl sdn sdo sdr sds slb sld sll sln slo slr sls snb snd snl snn sno snr sns sob sod sol son soo sor sos sr- srb srd srl srn sro srr srs ss- ssb ssd ssl ssn sso ssr sss