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#include<fstream>
using namespace std;
long long n,x,y;
long long cmmdc(long long d,long long i)
{
int c,r;
c=d/i;
r=d%i;
if(r==0)
return i;
return cmmdc(i,r);
}
int main()
{
ifstream f("euclid2.in");
ofstream g("euclid2.out");
f>>n;
for(int i=1;i<=n;i++)
{
f>>x>>y;
if(x>y)
g<<cmmdc(x,y)<<endl;
else
g<<cmmdc(y,x)<<endl;
}
f.close();
g.close();
return 0;
}