/**
 * Created by iyasuwatts on 10/17/17.
 */
import java.util.Scanner; 
public class Main {

    public static void main(String[] args ){
        Scanner scanner = new Scanner(System.in);
        
        while (true) {
            
            System.out.println("What is your name?");
            String name = scanner.nextLine();
            if (name.equals("Alice") || name.equals("Bob")) {
                System.out.println("Hello " + name + "!");
                break;
            } else {
                System.out.println("You're not Alice or Bob!");
            }
        }
    }
}