import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;


public class _02_SequencesOfEqualStrings {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        String[] allWords = sc.nextLine().split(" ");

        Map<String, Integer> wordCounter = new HashMap<String, Integer>();

        for (String word : allWords) {
            Integer count = wordCounter.get(word);
            if(count == null){
                count = 0;
            }
            wordCounter.put(word, count + 1);
        }

        for(String word : wordCounter.keySet()){
            int count = wordCounter.get(word);
            for (int i = 0; i < count; i++) {
                System.out.printf("%s ", word);
            }
            System.out.println();
        }
    }

}