#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());
            for(int i=0;i<a.length();i++)
            {
                if(a[i]!=b[i])
                {
                    cout<<"NO";
                    break;
                }
                t++;
            }
           if(t==a.length())
           {
               cout<<"YES";
           }
        }
    }

    return 0;
}