C1111233131211111211113313331333133313221211113313331333133313132323311   >>    C111123313121111121111331333133313331322121111331333133313331313232331   <<    C1111233131211111211113313331333133313221211113313331333133313132323313   >>      C1111233131211111211113313331333133313221211113313331333133313132323312   >>