C312312111111331312111133133313331333133313232233133313331333133313331123311311   >>    C31231211111133131211113313331333133313331323223313331333133313331333112331131   <<    C312312111111331312111133133313331333133313232233133313331333133313331123311313   >>      C312312111111331312111133133313331333133313232233133313331333133313331123311312   >>