import testing.*;

abstract class Ancestor {
}

class Unknown extends Ancestor {
  Unknown() { }
}

class Person extends Ancestor {
  String name;
  String eyeColor;
  Ancestor father;
  Ancestor mother;
  
  Person( String name, String eyeColor, Ancestor father, Ancestor mother) {
     this.name = name;
     this.eyeColor = eyeColor;
     this.father = father;
     this.mother = mother;
  }
}

class AncestorTest extends Test {
  AncestorTest() { }
  Ancestor who = new Unknown();

  Ancestor brownEyed = new Person("Inna", "green",
                                  new Person("John","brown",
                                    new Person("Emily","brown",new Unknown(),
                                                               this.who),
                                    new Person("Charlie","brown",new Unknown(),
                                                                 new Person("Bob","green", this.who, this.who))),
                                  this.who);
  
  Ancestor mom = new Person("Ruth","blue",new Person("Charles","blue",this.who,this.who),
                                          new Person("Eleanor","blue",this.who,this.who));
  Ancestor dad = new Person("Jim","grey",new Person("Jim","blue",this.who,this.who),
                                          new Person("Opal","green",this.who,this.who));
}