C11112331312111112111133133313331333132313233313331312213113311   >>    C1111233131211111211113313331333133313231323331333131221311331   <<    C11112331312111112111133133313331333132313233313331312213113313   >>      C11112331312111112111133133313331333132313233313331312213113312   >>