import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;

public class OArticle2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int n = Integer.parseInt(scanner.nextLine());

        List<String> articles = new ArrayList<>();

        for (int i = 0; i <= n ; i++) {
            String line = scanner.nextLine();
            articles.add(line);

            Collections.sort(articles);

        }

        System.out.print(articles);

    }
}