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#include <fstream>
using namespace std;
int T, A, B, r;
int GCD(int a, int b)
{
for(int i = min(a, b); i > 1; i--) {
if(a % i == 0 && a % b == 0) {
return i;
}
}
}
int main(void)
{
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
fin >> T;
for(int i = 1; i <= T; i++) {
fin >> A >> B;
r = GCD(A, B);
fout << r << endl;
}
fin.close();
fout.close();
}