C312312111133131212111133133313231333133313331331121111331322121221   >>    C31231211113313121211113313331323133313331333133112111133132212122   <<    C312312111133131212111133133313231333133313331331121111331322121223   >>      C312312111133131212111133133313231333133313331331121111331322121222   >>