CombineLetters

import java.util.Scanner;

public class _09_CombineListsOfLetters {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        String listOfLetts1 = sc.nextLine();
        String listOfLetts2 = sc.nextLine();
        StringBuilder listsCombined = new StringBuilder(listOfLetts1);

        String[] letters2 = listOfLetts2.split(" ");

        for (int i = 0; i < letters2.length; i++) {
            if (listOfLetts1.contains(letters2[i])) {

            } else {
                listsCombined.append(" " + letters2[i]);
            }
        }
        System.out.println(listsCombined);
    }

}