import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        System.out.println("Hello");
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        for (int t=0; t<n; t++) {
            int a= sc.nextInt();
            int b= sc.nextInt();
            System.out.println(a+b);
        }
        System.out.println("Done");


    }
}