#include <fstream>

using namespace std;

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

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

int main()
{
    int a, b, n;
    fin >> n;
    for (int i = 0; i < n; i++)
    {
        fin >> a >> b;
        fout << cmmdc(a, b) << ' ';
    }
    return 0;
}