c-- ccc ccd cck cco ccs ccw cdc cdd cdk cdo cds cdw ckc ckd cko cks ckw co- coc cod cok coo cos cow csc csd csk cso css csw cw- cwc cwd cwk cwo cws dcc dcd dck dco dcs dcw ddc ddd ddk ddo dds ddw dkc dkk dko dks dkw doc dod dok doo dos dow dsc dsd dsk dso dss dsw dwc dwo dws dww kcc kcd kck kcs kdc kdk kdo kds kkc kkk kks koc kod kok koo kos kow ksc ksd ksk kso kss ksw kw- kwc kwd kwk kwo kws kww oc- occ ocd ock oco ocs ocw odc odd odo ods okc okd okk oko oks okw oo- ooc ood ook ooo oos oow os- osc osd osk oso oss osw owc owd owk owo ows oww scc scd sck sco scs scw sdc sdd sdk sdo sds sdw sk- skc skd skk sko sks skw soc sod sok soo sos sow ss- ssc ssd ssk sso sss ssw swc swd swk swo sws wcc wcd wck wco wcs wcw wdc wds wkc wkd wko wks wkw woc wod wok woo wos wow wsc wsd wsk wso wss wsw wwc wwd wwo www