bbb bbm bbo bbs bby bmb bmm bmo bms bob bom boo bos boy bsb bsm bso bss bsy by- bym byo bys m-o mbb mbm mbo mbs mmb mmm mmo mms mob mom moo mos moy msb msm mso mss msy my- myb mym myo mys ob- obb obm obo obs oby om- omb omm omo oms omy oo- oob oom ooo oos os- osb osm oso oss oyo oys sbb sbm sbo sbs sby smb smm smo sms smy sob som soo sos soy ss- ssb ssm sso sss sy- syb sym sys ybm ybs yby ymm ymo yms yob yom yoo yos yoy ysb ysm yso yss ysy yyb yys yyy