String to Char arrList // Combine Lists of Letters

import java.util.ArrayList;
import java.util.Scanner;
public class _09_Combine_Lists_of_Letters {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
String[] firstLine = input.nextLine().split(" ");
String[] secondLine = input.nextLine().split(" ");
ArrayList<Character> l1 = new ArrayList<Character>();
ArrayList<Character> l2 = new ArrayList<Character>();
l1 = addCharacters(firstLine, l1);
l2 = addCharacters(secondLine, l2);
ArrayList<Character> result = new ArrayList<Character>(l1);
result = addCharactersFroml2(l1, l2, result);
printResult(result, l1);
}
private static void printResult(ArrayList<Character> result, ArrayList<Character> l1) {
for (Character character : result) {
System.out.print(character + " ");
}
}
private static ArrayList<Character> addCharactersFroml2(ArrayList<Character> l1,
ArrayList<Character> l2, ArrayList<Character> result) {
for (Character character : l2) {
if (!l1.contains(character)) {
result.add(character);
}
}
return result;
}
private static ArrayList<Character> addCharacters(String[] line, ArrayList<Character> list) {
for (String character : line) {
list.add(character.charAt(0));
}
return list;
}
}