#include <bits/stdc++.h>

using namespace std;
typedef long long ll;


void solve(){
    int n;cin>>n;
    string s;cin>>s;
    set<int> left_white,right_white,left_red,right_red;
    for(int i =0;i<n;i++){
        if(s[i]=='W')left_white.insert(i);
        else left_red.insert(i);
    }
    for(int i =n;i<2*n;i++){
        if(s[i]=='W')right_white.insert(i);
        else right_red.insert(i);
    }

    int ok=1;
    //cerr<<left_white.size()<<"\n";
    ok &= left_white.size()%2==0;
    ok &= left_red.size() == right_white.size();

    cout<<(ok?"YES\n":"NO\n");
}

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