C2221232323213331311331333133313231333132313331333121313233133213121   >>    C222123232321333131133133313331323133313231333133312131323313321312   <<    C2221232323213331311331333133313231333132313331333121313233133213123   >>      C2221232323213331311331333133313231333132313331333121313233133213122   >>