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#include <bits/stdc++.h>
#define DIM 100010
using namespace std;
typedef long long ll;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int n,a,b;
int euclid (int a,int b)
{
if(a<b)
swap(a,b);
while(b!=0)
{
int r = a%b;
a = b;
b = r;
}
return a;
}
int main()
{
fin>>n;
for(int i=1;i<=n;i++)
{
fin>>a>>b;
fout<<euclid(a,b)<<'\n';
}
return 0;
}