C11112331312111112111133132313331333133313233313123231323223311   >>    C1111233131211111211113313231333133313331323331312323132322331   <<    C11112331312111112111133132313331333133313233313123231323223313   >>      C11112331312111112111133132313331333133313233313123231323223312   >>