#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

void solve(){
    int n;
    cin>>n;
    string s;
    cin>>s;
    int c1=0,c2=0;
    for(int i=0;i<n;i++) {
        c1 += s[i] == 'W';
        c2 += s[i+n] == 'R';
    }
    cout<<(c1%2==0&&c2%2==0?"YES\n":"NO\n");
}

int main(){
    ios_base::sync_with_stdio(0),cin.tie(0);
    int t=1;cin>>t;
    while(t--) solve();
}