class Base {
  @Override
  public int hashCode() {
    return super.hashCode();
  }

  @Override
  public boolean equals(Object o) {
    return super.equals(o);
  }

  @Override
  public String toString() {
    return super.toString();
  }
}

class Child extends Base {
  @Override
  public int hashCode() {
    return super.hashCode();
  }

  @Override
  public boolean equals(Object o) {
    return super.equals(o);
  }

  @Override
  public String toString() {
    return super.toString();
  }
}