#include <iostream>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <vector>
#include <map>
#include <list>
#include <cmath>
#include <queue>
#include <stack>
#include <set>
#include <algorithm>
#define LL long long
#define INF 0x3f3f3f3f
#define RR freopen("in.txt","r",stdin)
#define WW freopen("out.txt","w",stdout)
#define lson l,m,rt<<1
#define rson m+1,r,rt<<1|1


using namespace std;

char s[110],a[110];
int main()
{
    int T;
    scanf("%d",&T);
    while(T--)
    {
        int n;
        scanf("%d",&n);
        cin>>s>>a;
        int f = 0;
        for(int i=0; i<n; i++)
        {
            if(s[i] == 'A')
            {
                if(a[i] != 'U')
                {
                    f = 1;
                    break;
                }
            }
            else if(s[i] == 'G')
            {
                if(a[i] !='C')
                {
                    f = 1;
                    break;
                }
            }
            else if(s[i] == 'C')
            {
                if(a[i] != 'G')
                {
                    f = 1;
                    break;
                }
            }
            else if(s[i] == 'T')
            {
                if(a[i]!='A')
                {
                    f = 1;
                    break;
                }
            }
        }
        if(!f)
            cout<<"YES"<<endl;
        else
            cout<<"NO"<<endl;

    }
    return 0;
}