C312312111133131212111133133313231333133313331322121111331333132211212331   >>    C31231211113313121211113313331323133313331333132212111133133313221121233   <<    C312312111133131212111133133313231333133313331322121111331333132211212333   >>      C312312111133131212111133133313231333133313331322121111331333132211212332   >>