#include <bits/stdc++.h>
using namespace std;
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int t;
    cin >> t;
    while (t--) {
        int n;
        cin >> n;
        string s;
        cin >> s;
        int up = 0;
        for (char c : s) {
            if (c == 'U') up++;
        }
        if (up % 2 == 0) {
            cout << "NO\n";
        } else {
            cout << "YES\n";
        }
    }
    return 0;
}

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Mwo1ClVVRFVECjUKVUREVUQKMgpVVQ==

3
5
UUDUD
5
UDDUD
2
UU