#include<iostream>
#include<cstring>
#include<cstdio>
#include<algorithm>
using namespace std;
const int maxn = 555;
int n;
char dna[maxn],rna[maxn];
///A与UU,TT与AA,CC与GG,GG与CC匹配
bool cmp(int i)
{
    if(dna[i] == 'A' && rna[i] == 'U')return true;
    if(dna[i] == 'T' && rna[i] == 'A')return true;
    if(dna[i] == 'C' && rna[i] == 'G')return true;
    if(dna[i] == 'G' && rna[i] == 'C')return true;
    return false;
}
bool solve()
{
    for(int i = 0;i<n;i++){
        if(!cmp(i))return 0;
    }
    return 1;
}
int main()
{
    int T;
    ///freopen("in.txt","r",stdin);
    scanf("%d",&T);
    while(T--){
        scanf("%d",&n);
        scanf("%s",dna);
        scanf("%s",rna);
        if(solve())printf("YES\n");
        else printf("NO\n");
    }
    return 0;
}