#include <stdio.h>
 
using namespace std;
int a,b,t,i;
int main(){
	freopen("euclid2.in","r",stdin); freopen("euclid2.out","w",stdout);
	scanf("%d",&t);
	for(i=1;i<=t;i++){
		scanf("%d,%d",&a,&b);
		while(a!=b){
			if(a>b) a=a-b;
			else b=b-a;
		}
		printf("%d",a,"\n");
	}
}