#include <bits/stdc++.h>
using namespace std;

using i64 = long long;

int main() {
    cin.tie(nullptr)->sync_with_stdio(false);

#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif

    int t;
    cin >> t;

    auto solve = [&]() {
        int n;
        cin >> n;

        string s;
        cin >> s;

        s = s + s + s + s;

        for (int i = 0; i + 3 <= 4 * n; i++) {
            if (s[i] == '?' && s[i + 1] != '?' && s[i + 1] == s[i + 2]) {
                s[i] = s[i + 1] ^ 1;
            }
        }

        for (int i = 0; i < n; i++) {
            if (s[i] != '?' && s[i + 1] == s[i] && s[i + 2] == s[i]) {
                cout << "No\n";
                return;
            }
        }

        cout << "Yes\n";
    };

    while (t--) {
        solve();
    }
    
    return 0;
}