class test{}
class list<A,B>{
	A a;
	B b(){}
	C d;
}

class main<x> extends list<list<test,test>,list<test,test>> {
  x r;
  list <test>l = new list();
  void main(){
    list<test,list<test,test>>s= new list();
    s.b();
    }
}

class List<A>{
        List <A>next = new List();
	A object = null;
}