C31231211111133131211113313331333132233133313331312111133133313232211211   >>    C3123121111113313121111331333133313223313331333131211113313331323221121   <<    C31231211111133131211113313331333132233133313331312111133133313232211213   >>      C31231211111133131211113313331333132233133313331312111133133313232211212   >>