BAEKJOON_1181

import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br =new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw =new BufferedWriter(new OutputStreamWriter(System.out));


        int N = Integer.parseInt(br.readLine());

        String[] str = new String[N];

        for(int i=0; i<N; i++){
            str[i] = br.readLine();
        }

        Arrays.sort(str,new Comparator<String>(){
           @Override
           public int compare(String s1, String s2){
               if(s1.length()==s2.length()){
                   return s1.compareTo(s2);
               }else{
                   return s1.length()-s2.length();
               }
           }
        });


        bw.write(str[0]);
        bw.newLine();
        bw.flush();
        for(int i=1; i<N; i++){
            if(!str[i-1].equals(str[i])){
                bw.write(str[i]);
                bw.newLine();
                bw.flush();
            }
        }
        bw.close();
    }
}