C11112331312111112111133133313331333133313223223313121111122131133132311   >>    C1111233131211111211113313331333133313331322322331312111112213113313231   <<    C11112331312111112111133133313331333133313223223313121111122131133132313   >>      C11112331312111112111133133313331333133313223223313121111122131133132312   >>