C1311213331333132332133313331333133313331311331333133311211312121   >>    C131121333133313233213331333133313331333131133133313331121131212   <<    C1311213331333132332133313331333133313331311331333133311211312123   >>      C1311213331333132332133313331333133313331311331333133311211312122   >>