bbb bbg bbm bbo bbs bgb bgg bgm bgo bgs bmb bmg bmm bmo bms bob bog bom boo bos bsb bsg bsm bso bss gbg gbm gbo gbs ggb ggg ggm ggo ggs gmb gmg gmm gmo gms gob gog gom goo gos gsb gsg gsm gso gss m-o mbb mbg mbm mbo mbs mgb mgm mgo mgs mmb mmg mmm mmo mms mob mog mom moo mos msb msg msm mso mss ob- obb obg obm obo obs ogg ogo ogs om- omb omg omm omo oms oo- oob oog oom ooo oos os- osb osg osm oso oss sbb sbg sbm sbo sbs sgb sgg sgm sgo sgs smb smg smm smo sms sob sog som soo sos ss- ssb ssg ssm sso sss