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#include<iostream>
#include<fstream>
using namespace std;
int main(){
int T;
int a, b;
int cmmdc = 0;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
fin >> T;
if(T >=1 && T <= 100000){
for(int i=1; i<=T; i++){
fin >> a >> b;
if(a == b){
cmmdc = a;
}
else if(a < b){
for(int j=a; j>=1; j--){
if(a % j == 0 && b % j == 0){
cmmdc = j;
break;
}
}
}
else{
for(int j=b; j>=1; j--){
if(a % j == 0 && b % j == 0){
cmmdc = j;
break;
}
}
}
fout << cmmdc << endl;
}
}
return 0;
}