C1311213331333132332133313331333133313121111331333133313113311212121   >>    C131121333133313233213331333133313331312111133133313331311331121212   <<    C1311213331333132332133313331333133313121111331333133313113311212123   >>      C1311213331333132332133313331333133313121111331333133313113311212122   >>