#include <cstdio>
#include <algorithm>
#define Dim (1<<13)

using namespace std;

unsigned n, poz;
char lin[Dim];

inline void cit(unsigned &x){
	x=0;
	while (lin[poz]<'0' || lin[poz]>'9'){
          poz++;
	      if (poz == Dim) fread(lin, 1, Dim, stdin), poz=0;   
    }
	while (lin[poz]>='0' && lin[poz]<='9'){
		x = 10*x+lin[poz++]-'0';     
        if (poz == Dim) fread(lin, 1, Dim, stdin), poz=0; 
	}            
}

inline void scrie(unsigned k){
     char lin[12], *s;
     s=lin+29; s[0]=0;
     do {
        unsigned cat=k/10;
        s--;
        s[0]=k-cat*10+'0';
        k=cat;
     } while (k);
     puts(s);
}

inline void cmmdc(int a, int b){
	while (b){
		int r = a % b;
		a = b;
		b = r;
	}
	scrie(a);
}

int main(){
	freopen("euclid2.in", "r", stdin);
	freopen("euclid2.out", "w", stdout);
	cit(n); 
	while (n--){
		unsigned a, b;
		cit(a); cit(b);
		cmmdc(a, b);
	}
}