c-- ccc cck ccm ccn cco ccr ccs ckc ckm cko cks cmc cmk cmm cmn cmo cmr cms cn- cnc cnm cnn cno cnr cns co- coc cok com con coo cor cos crc crk crm crn cro crr crs csc csk csm csn cso csr css kcc kck kcm kcn kcr kcs kkc kkk kkm kkn kkr kks kmc kmk kmm kmo kms kn- knc knk knm knn kno knr koc kok kom kon koo kor kos krc krk krn kro krr krs ksc ksk ksm ksn kso ksr kss m-o m-r mc- mcc mck mcm mcn mco mcr mcs mkc mkk mkm mkn mko mkr mks mmc mmk mmm mmn mmo mmr mms mnc mnk mnm mnn mno mnr mns moc mok mom mon moo mor mos mrc mrk mrm mrn mro mrr mrs msc msk msm msn mso msr mss ncc nck ncm ncn nco ncr ncs nkc nkk nkm nkn nko nkr nks nmc nmk nmm nmn nmo nmr nms nnc nnk nnm nnn nno nns no- noc nok nom non noo nor nos nrc nrk nrm nrn nro nrr nrs nsc nsk nsm nsn nso nsr nss oc- occ ock ocm ocn oco ocr ocs okc okk oko okr oks om- omc omm omn omo omr oms on- onc onk onn ono onr ons oo- ooc ook oom oon ooo oor oos or- orc ork orm orn oro orr ors os- osc osk osm osn oso osr oss rcc rcm rcn rco rcr rcs rkc rkk rkm rko rks rmc rmm rmn rmo rmr rms rnc rnm rnn rno rnr rns roc rok rom ron roo ror ros rrc rrk rrm rrn rrr rrs rsc rsk rsm rsn rso rsr rss scc sck scm scn sco scr scs sk- skc skk skm sko skr sks smc smk smm smn smo smr sms snc snk snm snn sno snr sns soc sok som son soo sor sos sr- src srk srm srn sro srr srs ss- ssc ssk ssm ssn sso ssr sss