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#include <iostream>
#include <fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
long long int euclid (long long int a , long long int b)
{
while(b != 0)
{
long long int r = a % b ;
a = b ;
b = r ;
}return a ;
}
int main()
{
int n ;
f >> n ;
for(int i = 1 ; i <= n ; i++ )
{
long long int x , y ;
f >> x >> y ;
g << euclid(x,y) << endl ;
}
f.close();
g.close();
return 0;
}