What will happen when each monster in the creepies arraylist is asked to frighten?

Use the heirarchy below:

Monster is the superclass, Alien and Vampire are subclasses.

import java.util.ArrayList;
public class Tester
{
   public static void main(String[] args){
   Monster m;
   Vampire v;
   Alien a;
   ArrayList<Monster> creepies = new ArrayList<Monster>();
   m= new Monster();
   a = new Alien();
   v= new Vampire();
   creepies.add(m);
   creepies.add(a);
   creepies.add(v);
   for(int i=0;i<creepies.size();i++){
     m=creepies.get(i);
     m.frighten();
     } 
   }
 }
   

Monster

frighten= say "grrrr"

   
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Alien

doesn't have a frighten method

 

Vampire

frighten = say "I vant your blood"