#include <bits/stdc++.h>
using namespace std;
int main()
{
string s1,s2;
int i,j,k,l,n,m,f;
cin>>n;
for(j=1;j<=n;j++)
{
cin>>s1>>s2;
l=s1.length();
f=0;
if(s1.length()==s2.length())
{
sort(s1.begin(),s1.end());
sort(s2.begin(),s2.end());
if(s1==s2)
{
f=1;
}
else
{
f=0;
}
}
if(f==1)
{
cout<<"YES"<<endl;
}
else
{
cout<<"NO"<<endl;
}
}
return 0;
}
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