// No.2707 Bag of Words Encryption
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        Map<String, Integer> wordCount = new HashMap<>();

        for (int i = 0; i < n; i++) {
            String word = sc.next();
            wordCount.put(word, wordCount.getOrDefault(word, 0) + 1);
        }

        List<String> words = new ArrayList<>(wordCount.keySet());
        words.sort(Comparator.comparingInt(wordCount::get));

        StringBuilder encrypted = new StringBuilder();
        for (String word : words) {
            int count = wordCount.get(word);
            for (int j = 0; j < count; j++) {
                encrypted.append(word);
                encrypted.append(" ");
            }
        }

        System.out.println(encrypted.toString().trim());
    }
}