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#include <iostream>
#include <fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
/*int Euclid(int a, int b)
{
int rest;
while(b)
{
rest=a%b;
a=b;
b=rest;
}
return a;
}
int Euclid2_0(int a, int b)
{
if(!b) return a;
if(a>b) return Euclid2_0(a-b,b);
return Euclid2_0(a, b-a);
}*/
int a, b, T;
int Euclid3_0(int a, int b)
{
if(!b) return a;
return Euclid3_0(b,a%b);
}
int main()
{
f>>T;
while(T)
{
f>>a>>b;
g<<Euclid3_0(a,b)<<endl;
T--;
}
return 0;
}