C2221232323213331311331333133313231333132313331333233113222311231112121   >>    C222123232321333131133133313331323133313231333133323311322231123111212   <<    C2221232323213331311331333133313231333132313331333233113222311231112123   >>      C2221232323213331311331333133313231333132313331333233113222311231112122   >>