C1311213331333132332133313331333133313121111331333133313231121121211   >>    C131121333133313233213331333133313331312111133133313331323112112121   <<    C1311213331333132332133313331333133313121111331333133313231121121213   >>      C1311213331333132332133313331333133313121111331333133313231121121212   >>