#include<stdio.h>
#include<string.h>
int main(){
int t;
scanf("%d",&t);
while(t--){
    char a[1002],b[1002];
    scanf("%s%s",a,b);
    int i=0,j=0,la,lb,lla,llb,aa[28]={0},bb[28]={0};
    la=lla=strlen(a);
    lb=llb=strlen(b);
    while(la){
       aa[a[--la]-'a']++;
    }
    while(lb){
        bb[b[--lb]-'a']++;
    }
    for(i=0;i<28;i++){
            if(aa[i]==bb[i]&&(aa[i]!=0))
            j++;
    }
if(j==0||(j==lla&&lla==llb))
printf("YES\n");
else
printf("NO\n");
memset(aa,28,0);
memset(bb,28,0);
}
return 0;
}
 
 

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