public class Shapes {
	
	public static void main(String[] args) {
		
		Triangle t = new Triangle();
		t.draw();
		t.area();
		t.print();
		
		Square s = new Square();
		s.draw();
		s.area();
		s.print();
		
		Rectangle r = new Rectangle();
		r.draw();
		r.area();
		r.print();
		
		Circle c = new Circle();
		c.draw();
		c.area();
		c.print();
	}

}

interface Shape {
	
	public void draw();
	public void area();
	public void print();
}

class Triangle implements Shape {
	
	public void draw() {
		
	}
	
	public void area() {
		
	}
	
	public void print(){
		
	}
}

class Square implements Shape {
	
	public void draw() {
		
	}
	
	public void area() {
		
	}
	
	public void print(){
		
	}	
}

class Rectangle implements Shape {
	
	public void draw() {
		
	}
	
	public void area() {
		
	}
	
	public void print(){
		
	}	
}

class Circle implements Shape {
	
	public void draw() {
		
	}
	
	public void area() {
		
	}
	
	public void print(){
		
	}	
}