C312312111133131212111133133313231333133313331322121111331333133313333213232321   >>    C31231211113313121211113313331323133313331333132212111133133313331333321323232   <<    C312312111133131212111133133313231333133313331322121111331333133313333213232323   >>      C312312111133131212111133133313231333133313331322121111331333133313333213232322   >>