#include <iostream>
using namespace std;
#include<string>
#include<algorithm>
int main() {
int n, t=0;
cin>>n;
for(int i=0;i<n;i++)
{
string a,b;
cin>>a>>b;
cout<<"\n";
if(a.length()!=b.length())
{
cout<<"NO";
}
else
{
sort(a.begin(),a.end());
sort(b.begin(),b.end());
if(a != b)
{
cout<<"NO";
}
else
{
cout<<"YES";
}
}
}
return 0;
}
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