#include <stdio.h>
int n, a, b;
int gcd(int a, int b)
{
    if (!b) return a;
    return gcd(b, a % b);
}
int main(void)
{
    freopen("euclid2.in", "r", stdin);
    freopen("euclid2.out", "w", stdout);
    scanf("%d", &n);
    for (; n; --n)
    {
        scanf("%d %d", &a, &a);
        printf("%d\n", gcd(a, a));
    }        
    return 0;
}