uvaB

#include <cstdio>
#include <string>
#include <cstring>
#include <sstream>
#include <iostream>
#include <iostream>


using namespace std;

int reverse(string number){


        int i, j;
        char temp;
        i=0;
        j= number.size()-1;


        while(i<j){
            temp = number[i];
            number[i]=number[j];
            number[j] = temp;

            i++;
            j--;

            }

    return  atoi(number.c_str());
    }

int main(int argc, char **argv)
{


    stringstream m;

    int t,x,y,sum,reminder;

    string a,b,first;
    cin>>t;

    while(t--){
        sum=0;
        reminder=0;
        cin>>a;
        cin>>b;

        x = reverse(a);
        y = reverse(b);

        sum = x+y;

        //m<<sum;
         //first = m.str();

         while(sum != 0 ){

             //reminder = sum % 10;

              reminder = reminder*10+(sum%10);



             sum /=10;

             }

            printf("%d",reminder);



        // printf("%c%c%c",first[0],first[1],first[2]);

        //printf("%d\n", reverse(first));

        //m<<0;
        //string s = to_string(sum);
        //string str = string(intStr);

        //cout<<str;

        }



    return 0;
}