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#include <iostream>
#include <fstream>
using namespace std;
int main()
{
ifstream fcin("euclid2.in");
ofstream fcout("euclid2.out");
int n, r=1;
fcin>>n;
int a[n][2];
for (int i=1; i<=n; i++)
for(int j=1; j<=2; j++)
fcin>>a[i][j];
for(int i=1; i<=n; i++)
{
while(a[i][2]) {
r = a[i][1] % a[i][2];
a[i][1]=a[i][2];
a[i][2]=r;
}
fcout<<a[i][1]<<endl;
}
return 0;
}