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#include <iostream>
#include <fstream>
using namespace std;
int cmmdc(int a, int b)
{
int r,aux;
r=a%b;
while(r)
{
aux=a;
a=b;
b=r;
r=a%b;
}
return b;
}
int main()
{
int n,i,a[100][10];
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
fin>>n;
for(i=1;i<=n;i++)
{
fin>>a[i][1];
fin>>a[i][2];
}
for(i=1;i<=n;i++)
{
fout<<cmmdc(a[i][1],a[i][2])<<endl;
}
fin.close();
fout.close();
return 0;
}