C11112331312111112111133133313331333132322121111331311331333133313233121211   >>    C1111233131211111211113313331333133313232212111133131133133313331323312121   <<    C11112331312111112111133133313331333132322121111331311331333133313233121213   >>      C11112331312111112111133133313331333132322121111331311331333133313233121212   >>