#include <bits/stdc++.h>
#define int long long

#define MULTITEST true

using namespace std;

void solve () {
    int N;
    cin >>N;

    string buffer;
    cin >> buffer;

    int w = 0;
    for (int i = 0; i < N; i ++)
        if (buffer[i] == 'W')
            w ++;
    
    if ((w % 2) == 0) cout << "YES\n";
    else cout << "NO\n";
}

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    cout.precision(30);
    
    int T = 1;
    if (MULTITEST) cin >> T;

    for (int t = 0; t < T; t ++)
        solve();
}