C11112331312111112111133133313331333133313331333133313113313233121211   >>    C1111233131211111211113313331333133313331333133313331311331323312121   <<    C11112331312111112111133133313331333133313331333133313113313233121213   >>      C11112331312111112111133133313331333133313331333133313113313233121212   >>