import java.util.Scanner; 

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while(sc.hasNextInt()){
            int a  = sc.nextInt();
            int b  = sc.nextInt();
            System.out.println(a+b);
        }
        sc.close();
    }
}