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#include <bits/stdc++.h>
using namespace std;
int euclid(int a,int b){
int r;
if(a>b){
while(a!=b){
r=a%b;
a=b;
b=r;
}
return a;
}
else{
while(b!=a){
r=b%a;
b=a;
a=r;
}
return b;
}
}
int main()
{
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int n,i,x,y;
fin>>n;
for(i=1;i<=n;i++){
fin>>x>>y;
fout<<euclid(x,y)<<"\n";
}
return 0;
}