C312312111111331312111133133313331331121111331333133313232213223311   >>    C31231211111133131211113313331333133112111133133313331323221322331   <<    C312312111111331312111133133313331331121111331333133313232213223313   >>      C312312111111331312111133133313331331121111331333133313232213223312   >>