c-- ccc cck ccm cco ccp ccr ccs ckc ckm cko cks cmc cmk cmm cmo cmp cmr cms co- coc cok com coo cop cor cos cpc cpk cpm cpo cpp cpr cps crc crk crm cro crp crr crs csc csk csm cso csp csr css kcc kck kcm kcp kcr kcs kkc kkk kkm kkp kkr kks kmc kmk kmm kmo kmp kms koc kok kom koo kop kor kos kpc kpk kpm kpo kpp kpr kps krc krk kro krp krr krs ksc ksk ksm kso ksp ksr kss m-o m-r mc- mcc mck mcm mco mcp mcr mcs mkc mkk mkm mko mkp mkr mks mmc mmk mmm mmo mmp mmr mms moc mok mom moo mop mor mos mpc mpk mpm mpo mpp mpr mps mrc mrk mrm mro mrp mrr mrs msc msk msm mso msp msr mss oc- occ ock ocm oco ocp ocr ocs okc okk oko okp okr oks om- omc omm omo omp omr oms oo- ooc ook oom ooo oop oor oos op- opc opk opm opo opp opr ops or- orc ork orm oro orp orr ors os- osc osk osm oso osp osr oss p-p pcc pck pcm pco pcp pcr pcs pkc pkm pko pkp pkr pks pmc pmk pmm pmo pmp pmr pms poc pok pom poo pop por pos ppc ppk ppm ppo ppp ppr pps prc prk prm pro prp prr prs ps- psc psk psm pso psp psr pss rcc rcm rco rcp rcr rcs rkc rkk rkm rko rkp rks rmc rmm rmo rmp rmr rms roc rok rom roo rop ror ros rpc rpk rpm rpo rpp rpr rps rrc rrk rrm rrp rrr rrs rsc rsk rsm rso rsp rsr rss scc sck scm sco scp scr scs sk- skc skk skm sko skp skr sks smc smk smm smo smp smr sms soc sok som soo sop sor sos spc spk spm spo spp spr sps sr- src srk srm sro srp srr srs ss- ssc ssk ssm sso ssp ssr sss