public class Test {
    public static void main(String args[]) {
        Scanner input = new Scanner(System.in);
        int[][] ops = null;
        boolean flag = true;
        int countTest = 0;
        while (flag) {
            System.out.print("多少组测试数据：\n");
            try {
                countTest = input.nextInt();
                ops = new int[countTest][3];
            } catch (Exception e) {
//                e.printStackTrace();
                continue;
            }
            flag = false;
        }
        System.out.print("请输入数据：\n");
        
        for(int index = 0;index<countTest*2; index++ ){
            ops[index/2][index%2] = input.nextInt();
            if((index+1)%2 == 0){
                ops[(index-1)/2][2] = ops[(index-1)/2][0]+ops[(index-1)/2][1];
            }
        }
        for(int index = 0;index<countTest;index++){
            System.out.println(ops[index][2]);
        }
    }
}