#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
 
using namespace std;
 
int main()
{
    int n;
    cin>>n;
    std::vector<int> aCountOfChars(256, 0);
    std::vector<int> bCountOfChars(256, 0);
 
    for(int i=0;i<n;i++)
    {
        string a,b;
        cin>>a>>b;
        std::vector<int> aCountOfChars(256, 0);
        std::vector<int> bCountOfChars(256, 0);
 
        for(int i=0;i<a.size();++i)
        {
        	++aCountOfChars[a[i]];	
        }
        for(int i=0;i<b.size();++i)
        {
        	++bCountOfChars[b[i]];	
        }
 
        if(aCountOfChars == bCountOfChars)
        {
        	cout<<"YES\n";
        }
        else
        {
        	cout<<"NO\n";
        }
    }
    return 0;
}

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