class Test {

    public static void main(String args[]) {
        
        Liste L = new Liste(new Element(3));
        L.InsertAmAnfang(new Element(2));
        L.InsertAmAnfang(new Element(1));
        
        for (ListenKnoten k = L.Anfang; k != null; k = k.n) System.out.println(k.e.Inhalt);
    }
}

class Element{
	int Inhalt   = 2000;
	Element(int i){Inhalt =i;}
	} 


class ListenKnoten{
	Element e;
	ListenKnoten n;
	ListenKnoten(Element ep){ e = ep; n = null;}
        ListenKnoten(Element ep, ListenKnoten np){ e = ep; n = np; }
        }

class Liste{
	ListenKnoten Anfang;
	Liste(Element e){ Anfang = new ListenKnoten(e); }
        void InsertAmAnfang(Element e){ Anfang = new ListenKnoten(e, Anfang);}
}