#include<stdio.h>
int gcd ( int a , int b )
{
if ( b == 0 )
return a ;
else
return gcd (b,a%b);
}
int main() {
int a , b ;
while(scanf("%d%d",&a,&b))
printf("%d\n",gcd(a,b));
return 0;
}
#include<stdio.h>
int gcd ( int a , int b )
{
if ( b == 0 )
return a ;
else
return gcd (b,a%b);
}
int main() {
int a , b ;
while(scanf("%d%d",&a,&b))
printf("%d\n",gcd(a,b));
return 0;
}