c-- ccc cck ccm ccn cco ccs ckc ckm cko cks cmc cmk cmm cmn cmo cms cn- cnc cnm cnn cno cns co- coc cok com con coo cos csc csk csm csn cso css kcc kck kcm kcn kcs kkc kkk kkm kkn kks kmc kmk kmm kmo kms kn- knc knk knm knn kno koc kok kom kon koo kos ksc ksk ksm ksn kso kss m-o mc- mcc mck mcm mcn mco mcs mkc mkk mkm mkn mko mks mmc mmk mmm mmn mmo mms mnc mnk mnm mnn mno mns moc mok mom mon moo mos msc msk msm msn mso mss ncc nck ncm ncn nco ncs nkc nkk nkm nkn nko nks nmc nmk nmm nmn nmo nms nnc nnk nnm nnn nno nns no- noc nok nom non noo nos nsc nsk nsm nsn nso nss oc- occ ock ocm ocn oco ocs okc okk oko oks om- omc omm omn omo oms on- onc onk onn ono ons oo- ooc ook oom oon ooo oos os- osc osk osm osn oso oss scc sck scm scn sco scs sk- skc skk skm sko sks smc smk smm smn smo sms snc snk snm snn sno sns soc sok som son soo sos ss- ssc ssk ssm ssn sso sss