#include <fstream>

using namespace std;

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

int main()
{

    int T,a,b,i,z,x,y;
    fin>>T;
    for(i=1;i<=T;i=i+1)
    {
        fin>>a>>b;
        x=a;
        y=b;
        while(x!=y)
        {
            if(x>y)
            {
                x=x-y;
            }
                else
                {
                    y=y-x;
                }
                fout<<x<<"\n";
            }

        }
    fin.close();
    fout.close();
    return 0;
}