public class NodeList {
	private Elem head;

	public NodeList(){
		head = null;
	}
	public void Insert(Elem a){
			a.setNext(head);
			head = a;
	}
	public Elem CheckList(String a){
		Elem temp = head;
		while(temp!=null){
			if(temp.getName().equals(a)) return temp;
			else temp = temp.getNext();
		}
		temp = new Elem(a);
		this.Insert(temp);
		return temp;
		
	}
	public String toString(){
		String s="";
		Elem temp = head;
		while(temp!=null){
			s += temp.toString();
			temp = temp.getNext();
		}
		return s;	
	}
}