#include<iostream>
#include<string>
using namespace std;




int main ()
{
    char DNA[150],RNA[150];
    int N, T;
    while(cin>>T)
    {
        while(T--)
        {
            cin>>N;
            getchar();
            gets(DNA);
            gets(RNA);
            for(int i = 0; i < N; i++)
            {
                if(DNA[i] == 'A' && RNA[i] == 'U')
                {
                    continue;
                }
                else if(DNA[i] == 'T' && RNA[i] == 'A')
                    continue;
                else if (DNA[i] == 'C' && RNA[i] == 'G')
                    continue;
                else if(DNA[i] == 'G' && RNA[i] == 'C')
                    continue;
                else
                {
                    cout<<"NO"<<endl;
                    break;
                }
            }
            if(i==N)
                cout<<"YES"<<endl;
        }
    }
    return 0;
}