import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.*;

public class Anagrams {

    public static void main(String[] args) throws IOException {
        findAll(System.in);
    }

    public static void findAll(InputStream inputStream) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
        String line;
        ArrayList<TreeSet<String>> anagrams = new ArrayList<>();
        while ((line = br.readLine()) != null){
            boolean f = true;
            for(TreeSet<String> group : anagrams){
                if(isAnagram(group.first(),line)){
                    group.add(line);
                    f = false;
                }
            }
            if(f){
                TreeSet<String> temp = new TreeSet<>();
                temp.add(line);
                anagrams.add(temp);
            }
        }
        anagrams.stream()
                .filter(each -> each.size() >= 5)
                .forEach(each -> {
                    String temp = each.toString().replaceAll(",", "");
                    System.out.println(temp.substring(1,temp.length()-1));
                });
    }

    public static boolean isAnagram(String s1, String s2){
        if(s1.length() != s2.length()) return false;
        char[] str1 = s1.toLowerCase().toCharArray();
        char[] str2 = s2.toLowerCase().toCharArray();
        Arrays.sort(str1); Arrays.sort(str2);
        return Arrays.equals(str1,str2);
    }
}