c-- ccc cck cco ccr ccs ccw ckc cko cks ckw co- coc cok coo cor cos cow crc crk cro crr crs crw csc csk cso csr css csw cw- cwc cwk cwo cwr cws kcc kck kcr kcs kkc kkk kkr kks koc kok koo kor kos kow krc krk kro krr krs krw ksc ksk kso ksr kss ksw kw- kwc kwk kwo kws kww oc- occ ock oco ocr ocs ocw okc okk oko okr oks okw oo- ooc ook ooo oor oos oow or- orc ork oro orr ors os- osc osk oso osr oss osw owc owk owo ows oww rcc rco rcr rcs rcw rkc rkk rko rks roc rok roo ror ros row rrc rrk rrr rrs rsc rsk rso rsr rss rsw rwc rwr rws scc sck sco scr scs scw sk- skc skk sko skr sks skw soc sok soo sor sos sow sr- src srk sro srr srs srw ss- ssc ssk sso ssr sss ssw swc swk swo swr sws wcc wck wco wcr wcs wcw wkc wko wkr wks wkw woc wok woo wor wos wow wr- wrc wrk wro wrr wrs wrw wsc wsk wso wsr wss wsw wwc wwo www