C11112331312111112111133133313331333132323133313331313231323233213311   >>    C1111233131211111211113313331333133313232313331333131323132323321331   <<    C11112331312111112111133133313331333132323133313331313231323233213313   >>      C11112331312111112111133133313331333132323133313331313231323233213312   >>