C11112331312111112111133133313331333132313233313331311332323311   >>    C1111233131211111211113313331333133313231323331333131133232331   <<    C11112331312111112111133133313331333132313233313331311332323313   >>      C11112331312111112111133133313331333132313233313331311332323312   >>