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//
// main.cpp
// CplusplusProjects
//
// Created by Vlad Tuchilus on 11/03/2019.
// Copyright © 2019 Vlad Tuchilus. All rights reserved.
//
#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int T, x, y;
int cmmdc(int a, int b){
if(a >= b)
{
if(a % b == 0)
{
return b;
}
else
{
return cmmdc(a % b, b);
}
}
if(b > a)
{
if(b % a == 0)
{
return a;
}
else
{
return cmmdc(a, b % a);
}
}
return 1;
}
int main() {
fin >> T;
for(int i = 1; i <= T; i++)
{
fin >> x;
fin >> y;
fout << cmmdc(x,y) << endl;
}
return 0;
}