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#include <iostream>
#include <fstream>
#include <sstream>
using namespace std;
int main()
{
ifstream in("euclid2.in");
ofstream out("euclid2.out");
int T;
in >> T;
long long int v[T][2];
for(int i = 1; i<=T; i++)
for(int j=1; j<=2; j++){
cin >> v[i][j];
long long int nr;
if(j==2)
{
for(long long int x=2;true;x++)
if(v[i][1]%x==0 && v[i][2]%x==0 && x <= min(v[i][1],v[i][2]))
nr = x;
else if(x > min(v[i][1],v[i][2]))
break;
}
out << nr;
}
return 0;
}