C312312111133131212111133133313231333133313331322133313132212311   >>    C31231211113313121211113313331323133313331333132213331313221231   <<    C312312111133131212111133133313231333133313331322133313132212313   >>      C312312111133131212111133133313231333133313331322133313132212312   >>