-ol bbb bbd bbl bbn bbo bbr bdb bdd bdl bdo bdr blb bld bll bln blo blr bnb bnd bnl bnn bno bnr bob bod bol bon boo bor brb brd brl brn bro brr dbb dbd dbl dbn dbo dbr ddb ddd ddl ddn ddo ddr dl- dlb dld dll dlo dlr dnb dnd dnl dnn dno dnr dob dod dol don doo dor drb drd drl drn dro drr lbb lbd lbl lbo lbr ldb ldd ldl ldn ldo ldr llb lld lll lln llo llr lnb lnd lnl lnn lno lnr lob lod lol lon loo lor lrb lrd lrn lro lrr nbb nbd nbl nbn nbo nbr ndb ndd ndl ndn ndo ndr nlb nld nll nln nlo nlr nnb nnl nnn nno no- nob nod nol non noo nor nrb nrd nrl nrn nro nrr ob- obb obd obl obn obo obr odb odd odl odn odo odr olb old oll oln olo on- onb ond onl onn ono onr oo- oob ood ool oon ooo oor or- orb ord orl orn oro orr rbb rbd rbl rbn rbo rbr rdb rdd rdl rdn rdo rdr rld rll rln rlo rlr rnb rnd rnn rno rnr rob rod rol ron roo ror rrb rrd rrl rrn rrr