#include <fstream>

using namespace std;

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

int t, i, x, y;

int cmmdc (int a, int b)
{
    int r=0;
    while (b)
    {
        r = a%b;
        a = b;
        b = r;
    }
    return a;
}

int main ()
{
    f >> t;
    for (i=1; i<=t; i++)
    {
        f >> x >> y;
        g << cmmdc (x, y) << " ";
    }
    return 0;
}