#include <bits/stdc++.h>

using namespace std;

ifstream f("euclid2.in");
ofstream g("euclid2.out");
struct myCmmdc
{
    int a,b;
    myCmmdc()
    {
        f>>a>>b;
        g<<cmmdc()<<'\n';
    }
    int cmmdc()
    {
        int r;
        while(b!=0)
        {
            r=a%b;
            a=b;
            b=r;
        }
        return a;
    }
};
struct solver
{
    solver()
    {
        int t;f>>t;
        for(;t;t--)
            myCmmdc test;
    }
};
solver s;
int main()
{
    return 0;
}