#include <iostream>
#include <fstream>
using namespace std;
int T, A, B;

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

int main(void)
{
    ifstream fin("euclid2.in");
    ofstream fout("euclid2.out");

    fin>>T;
    for (int i=0;i<T-1; i++)
    {
        fin>>A>>B;
        fout<<gcd(A, B)<<"\n";
    }

    return 0;
}