C312312111133131212111133133313231333133313331322121111331323112211232311   >>    C31231211113313121211113313331323133313331333132212111133132311221123231   <<    C312312111133131212111133133313231333133313331322121111331323112211232313   >>      C312312111133131212111133133313231333133313331322121111331323112211232312   >>