C312312111133131212111133133313231333133313331322121111331333132331231   >>    C31231211113313121211113313331323133313331333132212111133133313233123   <<    C312312111133131212111133133313231333133313331322121111331333132331233   >>      C312312111133131212111133133313231333133313331322121111331333132331232   >>