c-- ccc ccf ccm cco ccp ccr ccs cfc cff cfm cfo cfp cfr cfs cmc cmf cmm cmo cmp cmr cms co- coc cof com coo cop cor cos cpc cpf cpm cpo cpp cpr cps crc crf crm cro crp crr crs csc csf csm cso csp csr css fcc fcf fcm fco fcp fcr fcs ffc fff ffm ffo ffp ffr ffs fmc fmf fmm fmo fmp fmr fms foc fof fom foo fop for fos fpc fpm fpo fpp fpr fps frc frf frm fro frp frr frs fsc fsf fsm fso fsp fsr fss m-f m-o m-r mc- mcc mcf mcm mco mcp mcr mcs mfc mff mfm mfo mfp mfr mfs mmc mmf mmm mmo mmp mmr mms moc mof mom moo mop mor mos mpc mpf mpm mpo mpp mpr mps mrc mrf mrm mro mrp mrr mrs msc msf msm mso msp msr mss oc- occ ocf ocm oco ocp ocr ocs of- ofc off ofm ofo ofp ofr ofs om- omc omf omm omo omp omr oms oo- ooc oof oom ooo oop oor oos op- opc opf opm opo opp opr ops or- orc orf orm oro orp orr ors os- osc osf osm oso osp osr oss p-p pcc pcf pcm pco pcp pcr pcs pfc pff pfm pfo pfp pfr pfs pmc pmf pmm pmo pmp pmr pms poc pof pom poo pop por pos ppc ppf ppm ppo ppp ppr pps prc prf prm pro prp prr prs ps- psc psf psm pso psp psr pss rcc rcf rcm rco rcp rcr rcs rfc rff rfm rfo rfp rfr rfs rmc rmf rmm rmo rmp rmr rms roc rof rom roo rop ror ros rpc rpf rpm rpo rpp rpr rps rrc rrf rrm rrp rrr rrs rsc rsf rsm rso rsp rsr rss scc scf scm sco scp scr scs sfc sff sfm sfo sfp sfr sfs smc smf smm smo smp smr sms soc sof som soo sop sor sos spc spf spm spo spp spr sps sr- src srf srm sro srp srr srs ss- ssc ssf ssm sso ssp ssr sss