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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin ("euclid2.in");
ofstream fout ("euclid2.out");
int main()
{
int n,r;
pair<int,int> a;
fin>>n;
for(int i=0;i<n;i++)
{
fin>>a.first>>a.second;
r=a.first%a.second;
while(r)
{
a.first=a.second;a.second=r;r=a.first%a.second;
}
fout<<a.second<<'\n';
}
fin.close();
fout.close();
return 0;
}