#include<bits/stdc++.h>

using i64 = int64_t;
using u64 = uint64_t;
using f64 = long double;

#ifndef ONLINE_JUDGE
#include "algo\debug.hpp"
#else
#define debug(...) (void)42
#endif

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

	std::cout << std::fixed << std::setprecision(13);

	int n;
	std::cin >> n;

	std::map<std::string, int>rec;
	for (int i = 1; i <= n; i += 1) {
		std::string s;
		std::cin >> s;
		rec[s] += 1;
	}

	for (const auto & [x, v] : rec) {
		if (2 * v >= n) {
			std::cout << x << "\n";
			return 0;
		}
	}

	std::cout << "uh-oh\n";

	return 0;
}