#include <bits/stdc++.h>
using namespace std;

using ll = long long;
#define int ll
using pii = pair<int, int>;

void solve() {
    int n;
    cin>>n;
    string s;
    cin>>s;
    for(int i = 1; i < 2 * n - 1; i++)
    {
        string s1 = s;
        int k = 0;
        int ind = i;
        for(int j = 0; j < i; j++)
        {
            swap(s1[ind], s1[j]);
            ind++;
        }
        for(int j = 0; j < 2 * n; j++)
        {
            if(s1[i] == 'W') k++;
        }
        if(k >= n) 
        {
            cout<<"YES"<<endl;
            return;
        }
    }
    cout<<"NO"<<endl;
}

int32_t main() {
    cin.tie(0);
    cout.tie(0);
    ios_base::sync_with_stdio(0);

    int tt = 1;
    cin >> tt;
    for (int t = 0; t < tt; t++) {
        solve();
    }
    return 0;
}