#include <stdio.h>

int gcd(int a, int b)
{
	if (!b){
		return (a);
	}
	return (gcd(b, a % b));
}

int main(void)
{
	int a, b;
	
	while (scanf("%d%d", &a, &b) != EOF){
		if (a < b){
			a ^= b;
			b ^= a;
			a ^= b;
		}
		
		printf("%d\n", gcd(a, b));
	}
	
	return (0);
}