C312312111111331312111133133313331333121111331333133313331311331323223313231   >>    C31231211111133131211113313331333133312111133133313331333131133132322331323   <<    C312312111111331312111133133313331333121111331333133313331311331323223313233   >>      C312312111111331312111133133313331333121111331333133313331311331323223313232   >>