bbb bbm bbo bbr bbs bby bmb bmm bmo bmr bms bmz bob bom boo bor bos boy boz brb brm bro brr brs bry brz bsb bsm bso bsr bss bsy by- bym byo byr bys byz bzo bzr bzs bzz m-o m-r mbb mbm mbo mbr mbs mmb mmm mmo mmr mms mmz mob mom moo mor mos moy moz mrb mrm mro mrr mrs mry mrz msb msm mso msr mss msy my- myb mym myo myr mys mzb mzm ob- obb obm obo obr obs oby om- omb omm omo omr oms omy omz oo- oob oom ooo oor oos or- orb orm oro orr ors ory orz os- osb osm oso osr oss oyo oys ozm ozo ozs ozz rbb rbm rbo rbr rbs rmb rmm rmo rmr rms rob rom roo ror ros roy roz rrb rrm rrr rrs rsb rsm rso rsr rss ry- rym ryo ryr rys ryy ryz rzb rzm rzo rzy sbb sbm sbo sbr sbs sby smb smm smo smr sms smy smz sob som soo sor sos soy soz sr- srb srm sro srr srs sry ss- ssb ssm sso ssr sss ssz sy- syb sym syr sys szr ybm ybr ybs yby ybz ymm ymo yms yob yom yoo yor yos yoy yro yrs ysb ysm yso ysr yss ysy ysz yyb yys yyy yyz yzb yzr yzy zbb zbm zbr zbs zby zmb zmm zms zo- zob zom zoo zor zos zro zrs zsm zsz zym zzr zzs zzy zzz