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

using ll = long long;
using LL = long long;
using i64 = long long;

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

int main() {
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    int t; cin >> t;
    while (t--) solve();
}