#include <iostream>
#include <fstream>

#define MAX 100000

using namespace std;

ifstream in("euclid2.in");
ofstream out("euclid2.out");

int N,K,a,b,first[MAX],second[MAX];


int cmmdc(int a, int b)
{
    if (!b) return a;
    return cmmdc(b, a % b);
}

int main()
{
    in>>K;
    for(int i = 1; i <= K; i++){
        in>>a>>b;
        first[i] = a;
        second[i] = b;

    }


   for(int i = 1; i <= K; i ++){
        out<<cmmdc(first[i],second[i]);
   }




    return 0;
}