#include <iostream>
#include <string>
#define end '\n'
using namespace std;

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

    string s;
    cin >> s;

    bool flag = true;

    bool flagred = false;
    int cntw = 0, cntw1 = 0;
    for (int i = 0; i < n; ++ i)
    {
        if (s[i] == 'W')
        {
            cntw++;
            if (!flagred) cntw1++;
        }
        else flagred = true;
    }

    if (cntw % 2) flag = false;
    if (cntw1 < cntw / 2) flag = false;

    bool flagwhite = false;
    int cntr = 0, cntr1 = 0;
    for (int i = 2 * n - 1; i >= n; -- i)
    {
        if (s[i] == 'R')
        {
            cntr++;
            if (!flagwhite) cntr1++;
        }
        else flagwhite = true;
    }

    if (cntr % 2) flag = false;
    if (cntr1 < cntr / 2) flag = false;

    if (flag) cout << "YES" << endl;
    else cout << "NO" << endl; 
}

int main()
{
    ios :: sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    int t;
    cin >> t;

    while (t--)
    {
        solve();
    }

    return 0;
}