import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.stream.Collectors;

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

        String[] input = scanner.nextLine().split(",");
        List<Integer> listnums = new ArrayList<>();

        for (int i = 0; i < input.length; i++) {
            listnums.add(Integer.parseInt(input[i]));
        }

        List<Integer> removeDuplicates = listnums.stream().distinct().collect(Collectors.toList());

        for (int i = 0; i < removeDuplicates.size() - 1; i++) {
            System.out.print(removeDuplicates.get(i) + ",");
        }
        System.out.print(removeDuplicates.get(removeDuplicates.size() - 1));


    }
}