c-- ccc ccf ccm ccn cco ccr ccs cfc cff cfm cfn cfo cfr cfs cmc cmf cmm cmn cmo cmr cms cn- cnc cnf cnm cnn cno cnr cns co- coc cof com con coo cor cos crc crf crm crn cro crr crs csc csf csm csn cso csr css fcc fcf fcm fcn fco fcr fcs ffc fff ffm ffn ffo ffr ffs fmc fmf fmm fmn fmo fmr fms fnc fnf fnm fnn fnr fns foc fof fom fon foo for fos frc frf frm frn fro frr frs fsc fsf fsm fsn fso fsr fss m-f m-o m-r mc- mcc mcf mcm mcn mco mcr mcs mfc mff mfm mfn mfo mfr mfs mmc mmf mmm mmn mmo mmr mms mnc mnf mnm mnn mno mnr mns moc mof mom mon moo mor mos mrc mrf mrm mrn mro mrr mrs msc msf msm msn mso msr mss ncc ncf ncm ncn nco ncr ncs nfc nff nfn nfo nfr nfs nmc nmm nmn nmo nmr nms nnc nnf nnm nnn nno nns no- noc nof nom non noo nor nos nrc nrf nrm nrn nro nrr nrs nsc nsf nsm nsn nso nsr nss oc- occ ocf ocm ocn oco ocr ocs of- ofc off ofm ofn ofo ofr ofs om- omc omf omm omn omo omr oms on- onc onf onn ono onr ons oo- ooc oof oom oon ooo oor oos or- orc orf orm orn oro orr ors os- osc osf osm osn oso osr oss rcc rcf rcm rcn rco rcr rcs rfc rff rfm rfn rfo rfr rfs rmc rmf rmm rmn rmo rmr rms rnc rnm rnn rno rnr rns roc rof rom ron roo ror ros rrc rrf rrm rrn rrr rrs rsc rsf rsm rsn rso rsr rss scc scf scm scn sco scr scs sfc sff sfm sfn sfo sfr sfs smc smf smm smn smo smr sms snc snf snm snn sno snr sns soc sof som son soo sor sos sr- src srf srm srn sro srr srs ss- ssc ssf ssm ssn sso ssr sss