C312312111111331312111133133313331333121111331333133313331311331333132233123231   >>    C31231211111133131211113313331333133312111133133313331333131133133313223312323   <<    C312312111111331312111133133313331333121111331333133313331311331333132233123233   >>      C312312111111331312111133133313331333121111331333133313331311331333132233123232   >>