#include<stdio.h>int main(){    int m,x,y,i,j;    while(scanf("%d",&m)!=EOF)    {        while(m--)        {        int sum1=0,sum2=0;        scanf("%d %d",&x,&y);        for(i=1;i<x;i++)        {    if(x%i==0)        sum1+=i;};        for(j=1;j<y;j++)        {   if(y%j==0)        sum2+=j;}        if(sum1==y&&sum2==x)            printf("YES\n");        else            printf("NO\n");        }    }}