#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;
}