package com.Aperture.java;
import java.math.BigInteger;
import java.util.Scanner;
public class SystemTest {
public static void main(String[] args) {
Scanner sc1=new Scanner(System.in);
Scanner sc2=new Scanner(System.in);
int n=sc1.nextInt();
for (int i = 0; i < n; i++) {
String s1=sc2.nextLine();
String[] arr=s1.split(" ");
BigInteger b1= new BigInteger(arr[0]);
BigInteger b2= new BigInteger(arr[1]);
System.out.println(b1.add(b2));
}
}
}