ggg ggm ggo ggr ggs gmg gmm gmo gmr gms gog gom goo gor gos grg grm gro grr grs gsg gsm gso gsr gss m-o m-r mgm mgo mgr mgs mmg mmm mmo mmr mms mog mom moo mor mos mrg mrm mro mrr mrs msg msm mso msr mss ogg ogo ogs om- omg omm omo omr oms oo- oog oom ooo oor oos or- org orm oro orr ors os- osg osm oso osr oss rgg rgo rgr rgs rmg rmm rmo rmr rms rog rom roo ror ros rrg rrm rrr rrs rsg rsm rso rsr rss sgg sgm sgo sgr sgs smg smm smo smr sms sog som soo sor sos sr- srg srm sro srr srs ss- ssg ssm sso ssr sss