public class Honker {
  public static void main(String[] args) {
    Honkable[] hs = new Honkable[2];
    hs[0] = new Car();
    hs[1] = new Goose();

    for (int i = 0; i < hs.length; i++) {
      System.out.println(hs[i].honkNTimes(12));
    }
  }
}