#include <bits/stdc++.h>
using namespace std;
#define int long long 
#define F first
#define S second

void solve() {
	int n; cin >> n;
	string s; cin >> s;
	int cnt1 = 0, cnt2 = 0;
	bool ok = false;
	for (int i = 0; i < n; i++) {
		if (s[i] == 'R')
			ok = true;
		if (s[i] == 'W') {
			if (ok)
				cnt2++;
			cnt1++;
		}
	}
	
	if (cnt1%2 == 1)
	{
		cout << "NO" << "\n";
		return;
	}
	
	if (cnt2*2 > cnt1)
	{
		cout << "NO" << "\n";
		return;
	}
	
	ok = false;
	cnt2 = 0;
	for (int i = 2*n-1; i >= n; i--) {
		if (s[i] == 'W')
			break;
		if (s[i] == 'R')
			cnt2++;
	}
	//~ cout << cnt1 << " " << cnt2 << "\n";
	if (cnt2*2 < cnt1)
	{
		cout << "NO" << "\n";
		return;
	}
	
	cout << "YES" << "\n";
}

signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int t; cin >> t;
	while (t--) 
		solve();
}