#include <iostream>
#include <vector>
#include <set>

using namespace std;

int main() {
	int n;
	cin >> n;
	vector <string> v;
	set<string> s;

	for (int i = 0; i < n; ++i) {
		string str;
		cin >> str;
		if (!s.count(str)) {
			v.push_back(str);
			s.insert(str);
		}
	}

	for (const auto& elem : v) {
		cout << elem << endl;
	}

	return 0;
}