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#include <iostream>
#include <fstream>
using namespace std;
int divizor(int x, int y){
int i,z=1;
if (x<y) {i=x;x=y;y=i;};
for (i=1;i<=y;++i)
if (x%i==0 && y%i==0) z=i;
return z;
}
int main()
{
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int a,b,t,i;
fin >> t;
for (i=0;i<t;++i){
fin >> a >> b;
fout << divizor(a,b) << "\n";
}
return 0;
}