/**
 * Created by iyasuwatts on 10/17/17.
 */

import java.util.Scanner;

public class Main {

    public static void main(String[] args ){
        Scanner input = new Scanner(System.in);
        System.out.println("Enter your name.");
        String name = input.next();
        //String name2 = input.next();

        if(name.equals("Alice")){
            System.out.println("Hi Alice!");
        } else if(name.equals("Bob")){
            System.out.println("Hi Bob!");
        } else {
            System.out.println(name + ", I don't know you!");
        }
        
        //System.out.println("Number 2's name is " + name2);

    }
}