class SurfaceArea {
int width, height, depth, surface;

    public SurfaceArea(int width, int height) { //2d box
        this.width = width;
        this.height = height;
        surface = width*height;
    }

    public SurfaceArea(int width, int height, int depth) { //3d box
        this.width = width;
        this.height = height;
        this.depth = depth;
        surface = width*height*depth;
    }

    public getDepth() {
        return this.depth;
    }
}