#include<stdio.h>
int gcd(int a,int b)
{
return b ? gcd(b,a%b):a;
}
int main()
{
int a,b;
while(~scanf("%d%d",&a,&b))
{
printf("%d",gcd(a,b));
}
return 0;
}
int gcd(int a,int b)
{
return b ? gcd(b,a%b):a;
}
int main()
{
int a,b;
while(~scanf("%d%d",&a,&b))
{
printf("%d",gcd(a,b));
}
return 0;
}