#include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;

const int maxn=110;

char a[maxn],b[maxn];

bool check(char x,char y){
        if(x=='A') return y=='U';
        if(x=='T') return y=='A';
        if(x=='C') return y=='G';
        if(x=='G') return y=='C';
}

void work(){
        int n;
        scanf("%d",&n);
        scanf("%s%s",a,b);
        bool tag=1;
        for(int i=0; i<n; ++i)
                if(!check(a[i],b[i])){
                        tag=0;
                        break;
                }
        if(tag)printf("YES\n");
        else printf("NO\n");
}

int main(){
        int kase;
        scanf("%d",&kase);
        while(kase--) work();
        return 0;
}