CombineListsOfLetters

import java.awt.List;
import java.util.ArrayList;
import java.util.Scanner;



public class _09_CombineListsOfLetters {

    public static void main(String[] args) {

        ArrayList<Character> list1 = readListChar();
        ArrayList<Character> list2 = readListChar();

        list2.removeAll(list1);

        list1.addAll(list2);

        for (Character character : list1) {
            System.out.print(character + " ");
        }
    }


    public static ArrayList<Character> readListChar() {

        Scanner input = new Scanner(System.in);

        String[] chars = input.nextLine().split(" ");

        ArrayList<Character> list = new ArrayList<>();

        for (String ch : chars) {
            list.add(ch.charAt(0));
        }

        return list;
    }
}