#include<cstdio>
int main()
{int a,r,b;
freopen("euclid2.in","r",stdin);
freopen("euclid2.out","w",stdout);
scanf("%d",&a);
for(;scanf("%d%d",&a,&b)+1;)
{for(;b;)
{r=a%b;a=b;b=r;}printf("%d\n",a);}
return 0;}