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#include<fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int cmmdc(int n, int k){
int i,mn;
if(n<k)mn=n;
else mn=k;
for(i=mn;i>=1;i--)if(n%i==0 && k%i==0)return i;
}
int main(){
int T,a[1000][2];
fin>>T;
for(int i=1; i<=T; i++)
for(int j=1;j<=2;j++)
fin>>a[i][j];
int j=1;
for(int i=1; i<=T; i++){
fout<<cmmdc(a[i][j],a[i][j+1])<<"\n";
j=1;
}
}