C1111133313331323223313331333133313231333132332131333131211113313233212321   >>    C111113331333132322331333133313331323133313233213133313121111331323321232   <<    C1111133313331323223313331333133313231333132332131333131211113313233212323   >>      C1111133313331323223313331333133313231333132332131333131211113313233212322   >>