#include <bits/stdc++.h>

using namespace std;


void solve(){
    int n;
    cin >> n;
    string s;
    cin >> s;
    int cateAlbeInPrima = 0, cateNegreInADoua = 0;
    for(int i = 0; i < n; i++){
        if(s[i] == 'W')
            cateAlbeInPrima++;
    }
    for(int i = n; i < 2 * n; i++){
        if(s[i] == 'R')
            cateNegreInADoua++;
    }
    if(cateAlbeInPrima % 2 == 0 && cateNegreInADoua % 2 == 0 && n - cateAlbeInPrima == n - cateNegreInADoua){
        cout << "YES\n";
    }
    else{
        cout << "NO\n";
    }
}

int main(){
    ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);

    int t;
    cin >> t;
    while(t--){
        solve();
    }
    return 0;
}