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