bbb bbd bbm bbo bbr bdb bdd bdm bdo bdr bdz bmb bmd bmm bmo bmr bmz bob bod bom boo bor boz brb brd brm bro brr brz bzd bzo bzr bzz dbb dbd dbm dbo dbr dbz ddb ddd ddm ddo ddr ddz dmb dmd dmm dmo dmr dmz dob dod dom doo dor doz drb drd drm dro drr drz dzb dzd dzo dzr m-o m-r mbb mbd mbm mbo mbr mdb mdd mdm mdo mdr mdz mmb mmd mmm mmo mmr mmz mob mod mom moo mor moz mrb mrd mrm mro mrr mrz mzb mzm ob- obb obd obm obo obr odb odd odm odo odr om- omb omd omm omo omr omz oo- oob ood oom ooo oor or- orb ord orm oro orr orz ozm ozo ozz rbb rbd rbm rbo rbr rdb rdd rdm rdo rdr rmb rmd rmm rmo rmr rob rod rom roo ror roz rrb rrd rrm rrr rzb rzm rzo zbb zbm zbr zdm zmb zmd zmm zo- zob zod zom zoo zor zro zzr zzz