#include <iostream>
#include <fstream>
using namespace std;

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

int main()
{
    int a,b,r,n;

    f>>n;
    for(int i = 1;i < n;i++)
    {
        f>>a>>b;
        while(b != 0)
        {
            r = a % b;
            a = b;
            b = r;
        }
        g<<a<<'\n';
    }
    return 0;
}