C2221232323213331311331333133313231333132313331333233113222311232323121   >>    C222123232321333131133133313331323133313231333133323311322231123232312   <<    C2221232323213331311331333133313231333132313331333233113222311232323123   >>      C2221232323213331311331333133313231333132313331333233113222311232323122   >>