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#include <bits/stdc++.h>
using namespace std;
ifstream fin ("euclid2.in");
ofstream fout ("euclid2.out");
int t[100001];
int gcd(int a, int b)
{
if (!b) return a;
return gcd(b, a % b);
}
int main()
{
long long a, b, n;
fin >> n;
for(int i = 1; i<= n;i++)
{
fin >> a >> b;
while(b != 0)
{
long long r = a % b;
a = b;
b = r;
}
t[i] = a;
}
for(int i = 1; i<= n;i++)
fout << t[i] << '\n';
return 0;
}