C11112331312111112111133133313331333133313331333133313331211113313233313233311   >>    C1111233131211111211113313331333133313331333133313331333121111331323331323331   <<    C11112331312111112111133133313331333133313331333133313331211113313233313233313   >>      C11112331312111112111133133313331333133313331333133313331211113313233313233312   >>