C312312111111331312111133133313331333121111121133133313221333133313232322311   >>    C31231211111133131211113313331333133312111112113313331322133313331323232231   <<    C312312111111331312111133133313331333121111121133133313221333133313232322313   >>      C312312111111331312111133133313331333121111121133133313221333133313232322312   >>