C312312111111331312111133133313331333133313232233131133132312311   >>    C31231211111133131211113313331333133313331323223313113313231231   <<    C312312111111331312111133133313331333133313232233131133132312313   >>      C312312111111331312111133133313331333133313232233131133132312312   >>