#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
using namespace std;
#define M 1000
int main()
{
    int t;
    cin >> t;
    while(t--)
    {
        int n;
        cin >> n;
        char s1[1000],s2[1000];
        cin >> s1 >> s2;
        int ok = 1;
        for(int i = 0;i < n;i++)
        {
            if(s1[i] == 'A')
            {
                if(s2[i] != 'U') ok = 0;
            }
            else if(s1[i] == 'C')
            {
                if(s2[i] != 'G') ok = 0;
            }
            else if(s1[i] == 'G')
            {
                if(s2[i] != 'C') ok = 0;
            }
            else if(s1[i] == 'T')
            {
                if(s2[i] != 'A') ok = 0;
            }
        }
        if(ok) cout << "YES\n";
        else cout << "NO\n";
    }
    return 0;
}