class Rectangle implements java.lang.Comparable<Rectangle> {
    
  int width;
  int height;
 
  public Rectangle(int initWidth, int initHeight) {
    width = initWidth;
    height = initHeight;
  }
  
  int area() {
    return width * height;
  }
  public String toString() {
    return "width: "+width+", height: "+height;
  }
  
  public int compareTo(Rectangle r) {
    return this.area() - r.area();
  }
}