C1111133313331323223313331333133313231333132332131333131133131323221111   >>    C111113331333132322331333133313331323133313233213133313113313132322111   <<    C1111133313331323223313331333133313231333132332131333131133131323221113   >>      C1111133313331323223313331333133313231333132332131333131133131323221112   >>