C1111233131211111211113313331333133313332213113121111331333132323311111   >>    C111123313121111121111331333133313331333221311312111133133313232331111   <<    C1111233131211111211113313331333133313332213113121111331333132323311113   >>      C1111233131211111211113313331333133313332213113121111331333132323311112   >>