#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;
}