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- import java.util.ArrayList;
- import java.util.HashSet;
- import java.util.LinkedHashSet;
- import java.util.Scanner;
- import java.util.Set;
- public class CombineListsOfLetters {
- public static void main(String[] args) {
- Scanner scn = new Scanner(System.in);
- String firstLine = scn.nextLine();
- String secondLine = scn.nextLine();
- ArrayList<Character> input = new ArrayList<>();
- for (char c : firstLine.toCharArray()) {
- input.add(c);
- }
- for (char c : secondLine.toCharArray()) {
- input.add(c);
- }
- Set<Character> s = new LinkedHashSet<Character>(input);
- for (Character character : s) {
- System.out.print(character);
- }
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