// to represent a geometric shape
interface IShape{}

// to represent a circle
class Circle implements IShape{
  int x;
  int y;
  int rad;
  
  Circle(int x, int y, int rad){
    this.x = x;
    this.y = y;
    this.rad = rad;
  }
}

// to represent a rectangle
class Rect implements IShape{
  int x;
  int y;
  int w;
  int h;
  
  Rect(int x, int y, int w, int h){
    this.x = x;
    this.y = y;
    this.w = w;
    this.h = h;
  }
}

// to represent a combined shape
class Combo implements IShape{
  IShape top;
  IShape bot;
  
  Combo(IShape top, IShape bot){
    this.top = top;
    this.bot = bot;
  }
}