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#include <fstream>
using namespace std;
fstream fin("euclid2.in", ios::in);
fstream fout("euclid2.out", ios::out);
int euclid(int n, int m)
{
if(m==0) return n;
euclid(m, n%m);
}
int main()
{
int n, v[100010], v2[100010];
fin>>n;
for(int i=1; i<=n; i++)
fin>>v[i]>>v2[i];
for(int i=1; i<=n; i++)
fout<<euclid(v[i], v2[i])<<"\n";
fin.close();
fout.close();
return 0;
}