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#include <iostream>
#include <fstream>
using namespace std;
int cmmdc(int a, int b)
{
int nr=1;
if(b>a)
{
int aux = a;
a=b;
b=aux;
}
for(int i=2; i<=a/2; i++)
while(a%i==0 && b%i==0)
{
a /= i;
b /= i;
nr *= i;
}
return nr;
}
int main()
{
ifstream in("euclid2.in");
ofstream out("euclid2.out");
int n,x,y;
in>>n;
for(int i=0; i<n; i++)
{
in>>x>>y;
out<<cmmdc(x,y)<<'\n';
}
return 0;
}