c-- ccc ccm ccn cco ccr cmc cmm cmn cmo cmr cn- cnc cnm cnn cno cnr co- coc com con coo cor crc crm crn cro crr m-o m-r mc- mcc mcm mcn mco mcr mmc mmm mmn mmo mmr mnc mnm mnn mno mnr moc mom mon moo mor mrc mrm mrn mro mrr ncc ncm ncn nco ncr nmc nmm nmn nmo nmr nnc nnm nnn nno no- noc nom non noo nor nrc nrm nrn nro nrr oc- occ ocm ocn oco ocr om- omc omm omn omo omr on- onc onn ono onr oo- ooc oom oon ooo oor or- orc orm orn oro orr rcc rcm rcn rco rcr rmc rmm rmn rmo rmr rnc rnm rnn rno rnr roc rom ron roo ror rrc rrm rrn rrr