public static String stats(){
		
		StringBuilder sb = new StringBuilder();
		
		for (Node node : getElements()) {
			
			String prev = node.getPrevious()!=null	?node.getPrevious().getKey():"Null";
			String next = node.getNext()!=null		?node.getNext().getKey()	:"Null";
			
			sb.append("\nKey: "+node.getKey()+", previous: "+prev+", next: "+next);
			
		}
	
		return sb.toString();
	}