#include <bits/stdc++.h>
#define all(x) x.begin(), x.end()
#define PII std::pair<int, int> 

using ll = long long;

void solve() {
	int n; std::cin >> n;
	std::string s; std::cin >> s;
	s += s;
	for (int i = 2; i < n + n; i++) {
		if(s[i - 1] == s[i - 2] and s[i - 2] != '?') {
			if(s[i] == s[i - 1]) {
				std::cout << "No\n";
				return;
			} else if(s[i] == '?') {
				char x = '1' - s[i - 1] + '0';
				if(s[i + 1] == s[i + 2] and s[i + 1] == x) {
					std::cout << "No\n";
					return;
				} else {
					s[i] = x;
				}
			}
		}
	}
	std::cout << "Yes\n";
}

int main() {
	std::ios::sync_with_stdio(false);
	std::cin.tie(nullptr);

	int T = 1;
	std::cin >> T;
	while(T--) {
		solve();
	}

	return 0;
}