C312312111133131212111133133313231333133313331322133313132323211   >>    C31231211113313121211113313331323133313331333132213331313232321   <<    C312312111133131212111133133313231333133313331322133313132323213   >>      C312312111133131212111133133313231333133313331322133313132323212   >>