C31231211111133131211113313231333133313331333133313133313331333132313232213231   >>    C3123121111113313121111331323133313331333133313331313331333133313231323221323   <<    C31231211111133131211113313231333133313331333133313133313331333132313232213233   >>      C31231211111133131211113313231333133313331333133313133313331333132313232213232   >>