class Shape {
    int width, height;
 
    Shape(int width, int height) {
        this.width = width;
        this.height = height;
    }
 
    int getArea() {
        return width * height;
    }
}
 
class Rectangle extends Shape {
    Rectangle(int width, int height) {
        super(width, height);
    }
 
    int getArea() {
        return width * height;
    }
}
 
public class Main {
    public static void main(String[] args) {
        Shape shape = new Shape(10, 20);
        System.out.println("Shape area: " + shape.getArea());
 
        Rectangle rectangle = new Rectangle(10, 20);
        System.out.println("Rectangle area: " + rectangle.getArea());
    }
}
 

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