bbb bbm bbo bbr bby bmb bmm bmo bmr bmz bob bom boo bor boy boz brb brm bro brr bry brz by- bym byo byr byz bzo bzr bzz m-o m-r mbb mbm mbo mbr mmb mmm mmo mmr mmz mob mom moo mor moy moz mrb mrm mro mrr mry mrz my- myb mym myo myr mzb mzm ob- obb obm obo obr oby om- omb omm omo omr omy omz oo- oob oom ooo oor or- orb orm oro orr ory orz oyo ozm ozo ozz rbb rbm rbo rbr rmb rmm rmo rmr rob rom roo ror roy roz rrb rrm rrr ry- rym ryo ryr ryy ryz rzb rzm rzo rzy ybm ybr yby ybz ymm ymo yob yom yoo yor yoy yro yyb yyy yyz yzb yzr yzy zbb zbm zbr zby zmb zmm zo- zob zom zoo zor zro zym zzr zzy zzz