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#include <bits/stdc++.h>
using namespace std;
int main()
{ ifstream f("euclid2.in");
ofstream g("euclid2.out");
int t;
f>>t;
int a[t][2], i;
for (i=0;i<t;i++)
for(int j=0;j<2;j++) f>>a[i][j];
int r[t];
for (i=0;i<t;i++) r[i]=1;
for (i=0;i<t;i++){
int m=max(a[i][0], a[i][1]);
for(int j=1;j<m;j++)
{
if(a[i][1]%j==0 && a[i][0]%j==0) { r[i]=j;}}
} for (i=0;i<t;i++) g<<r[i]<<endl;
f.close();
g.close();
return 0;
}