c-- ccc ccf ccm ccn cco ccr cfc cff cfm cfn cfo cfr cmc cmf cmm cmn cmo cmr cn- cnc cnf cnm cnn cno cnr co- coc cof com con coo cor crc crf crm crn cro crr fcc fcf fcm fcn fco fcr ffc fff ffm ffn ffo ffr fmc fmf fmm fmn fmo fmr fnc fnf fnm fnn fnr foc fof fom fon foo for frc frf frm frn fro frr m-f m-o m-r mc- mcc mcf mcm mcn mco mcr mfc mff mfm mfn mfo mfr mmc mmf mmm mmn mmo mmr mnc mnf mnm mnn mno mnr moc mof mom mon moo mor mrc mrf mrm mrn mro mrr ncc ncf ncm ncn nco ncr nfc nff nfn nfo nfr nmc nmm nmn nmo nmr nnc nnf nnm nnn nno no- noc nof nom non noo nor nrc nrf nrm nrn nro nrr oc- occ ocf ocm ocn oco ocr of- ofc off ofm ofn ofo ofr om- omc omf omm omn omo omr on- onc onf onn ono onr oo- ooc oof oom oon ooo oor or- orc orf orm orn oro orr rcc rcf rcm rcn rco rcr rfc rff rfm rfn rfo rfr rmc rmf rmm rmn rmo rmr rnc rnm rnn rno rnr roc rof rom ron roo ror rrc rrf rrm rrn rrr