C312312111133131212111133133313231333133313331322121111331212231   >>    C31231211113313121211113313331323133313331333132212111133121223   <<    C312312111133131212111133133313231333133313331322121111331212233   >>      C312312111133131212111133133313231333133313331322121111331212232   >>