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#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int T, v[100000],k;
int Euclid(int a, int b)
{
int r;
while(b)
{
r = a % b;
a = b;
b = r;
}
return a;
}
int main()
{
fin >> T;
for(int i = 0; i < T; i++)
{
int a, b;
fin >> a >> b;
v[k++] = Euclid(a, b);
}
for(int i = 0; i < k; i++)
fout << v[i] << '\n';
return 0;
}