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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
struct perechi
{
int a;
int b;
}T[100001];
int euclid(int a, int b)
{
int r;
while(b!=0)
{
r=a%b;
a=b;
b=r;
}
return a;
}
long long n,i;
int main()
{
fin>>n;
for(i=1;i<=n;i++)
{
fin>>T[i].a;
fin>>T[i].b;
}
for(i=1;i<=n;i++)
{
fout<<euclid(T[i].a,T[i].b)<<endl;
}
}