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#include <iostream>
#include <fstream>
using namespace std;
ifstream f ("euclid2.in");
ofstream g ("euclid2.out");
int n;
void citire();
void euclid(int a, int b) {
int r;
while(b != 0) {
r = a%b;
a = b;
b = r;
}
g << a << '\n';
}
//int euclid2(int a, int b)
//{
// int c;
// while (b) {
// c = a % b;
// a = b;
// b = c;
// }
// return a;
//}
int main()
{
citire();
return 0;
}
void citire() {
int a, b;
f >> n;
for(int i = 1; i <= n; ++i) {
f >> a >> b;
// if (a > b)
euclid(a,b);
// else
// euclid(b,a);
//g << euclid2(a,b) << '\n';
}
}