m-o m-r mmm mmn mmo mmr mms mnm mnn mno mnr mns mom mon moo mor mos mrm mrn mro mrr mrs msm msn mso msr mss nmm nmn nmo nmr nms nnm nnn nno nns no- nom non noo nor nos nrm nrn nro nrr nrs nsm nsn nso nsr nss om- omm omn omo omr oms on- onn ono onr ons oo- oom oon ooo oor oos or- orm orn oro orr ors os- osm osn oso osr oss rmm rmn rmo rmr rms rnm rnn rno rnr rns rom ron roo ror ros rrm rrn rrr rrs rsm rsn rso rsr rss smm smn smo smr sms snm snn sno snr sns som son soo sor sos sr- srm srn sro srr srs ss- ssm ssn sso ssr sss