c-- ccc ccm ccn cco ccr ccs cmc cmm cmn cmo cmr cms cn- cnc cnm cnn cno cnr cns co- coc com con coo cor cos crc crm crn cro crr crs csc csm csn cso csr css m-o m-r mc- mcc mcm mcn mco mcr mcs mmc mmm mmn mmo mmr mms mnc mnm mnn mno mnr mns moc mom mon moo mor mos mrc mrm mrn mro mrr mrs msc msm msn mso msr mss ncc ncm ncn nco ncr ncs nmc nmm nmn nmo nmr nms nnc nnm nnn nno nns no- noc nom non noo nor nos nrc nrm nrn nro nrr nrs nsc nsm nsn nso nsr nss oc- occ ocm ocn oco ocr ocs om- omc omm omn omo omr oms on- onc onn ono onr ons oo- ooc oom oon ooo oor oos or- orc orm orn oro orr ors os- osc osm osn oso osr oss rcc rcm rcn rco rcr rcs rmc rmm rmn rmo rmr rms rnc rnm rnn rno rnr rns roc rom ron roo ror ros rrc rrm rrn rrr rrs rsc rsm rsn rso rsr rss scc scm scn sco scr scs smc smm smn smo smr sms snc snm snn sno snr sns soc som son soo sor sos sr- src srm srn sro srr srs ss- ssc ssm ssn sso ssr sss