#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';
    for(int i=0;i<n;i++){
        if(s[i]=='R')
            break;
        c2++;
    }
    if(2*c2<c1||c1%2){
        cout<<"NO\n";
        return;
    }
    c1=0;
    c2=0;
    for(int i=0;i<n;i++)
        c1+=s[i+n]=='R';
    for(int i=n-1;i>=0;i--){
        if(s[i+n]=='W')
            break;
        c2++;
    }
    if(2*c2<c1||c1%2){
        cout<<"NO\n";
        return;
    }
    cout<<"YES\n";
}

/*
1
6
WRWWRWWWRRRR
 */

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