C11112331312111112111133133313331333132313233313113313331333132232311   >>    C1111233131211111211113313331333133313231323331311331333133313223231   <<    C11112331312111112111133133313331333132313233313113313331333132232313   >>      C11112331312111112111133133313331333132313233313113313331333132232312   >>