下面程序结果为：(     )

class Guy {
    String greet() {
        return "hi";
    }
}
class Cowboy extends Guy {
    String greet() {
        return "howdy";
    }
}
class Wrangler extends Cowboy {
    String greet() {
        return "ouch!";
    }
}
class Greetings2 {
    public static void main(String[] args) {
        Guy g = new Wrangler();
        Guy g2 = new Cowboy();
        Wrangler w2 = new Wrangler();
        System.out.print(g.greet() + g2.greet() + w2.greet());
    }
}