interface Coffee {
    double cost();
    String description();
}

class SimpleCoffee implements Coffee {
    public double cost() { return 2.0; }
    public String description() { return "Simple Coffee"; }
}

abstract class CoffeeDecorator implements Coffee {
    protected Coffee coffee;

    CoffeeDecorator(Coffee coffee) {
        this.coffee = coffee;
    }

    public double cost() { return coffee.cost(); }
    public String description() { return coffee.description(); }
}

class Milk extends CoffeeDecorator {
    Milk(Coffee coffee) { super(coffee); }
    public double cost() { return coffee.cost() + 0.5; }
    public String description() {
        return coffee.description() + " + Milk";
    }
}

class Sugar extends CoffeeDecorator {
    Sugar(Coffee coffee) { super(coffee); }
    public double cost() { return coffee.cost() + 0.3; }
    public String description() {
        return coffee.description() + " + Sugar";
    }
}

public static void main(String[] args) {
    Coffee coffee = new SimpleCoffee();
    coffee = new Milk(coffee);
    coffee = new Sugar(coffee);
    System.out.println(coffee.description()
        + " $" + coffee.cost());
}