import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
while (scanner.hasNextInt()) {
int x = scanner.nextInt();
int y = scanner.nextInt();
Data data = new Data(x, y);
System.out.println(data.getX() + data.getY());
}
}
}
class Data {
private int x;
private int y;
Data(int x, int y) {
this.x = x;
this.y = y;
}
int getX() { return x; }
int getY() { return y; }
}