import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.List;
import java.util.TreeSet;
import java.util.stream.Collectors;

public class SimilarArrays {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        int n = Integer.parseInt(reader.readLine().trim());
        List<Integer> first = Arrays
                .stream(reader.readLine().split("\\s+"))
                .map(Integer::parseInt)
                .collect(Collectors.toList());

        int m = Integer.parseInt(reader.readLine().trim());
        List<Integer> second = Arrays
                .stream(reader.readLine().split("\\s+"))
                .map(Integer::parseInt)
                .collect(Collectors.toList());

        TreeSet<Integer> a = new TreeSet<>(first);
        TreeSet<Integer> b = new TreeSet<>(second);

        if (a.containsAll(b) && b.containsAll(a)) {
            System.out.println(a.size());
            return;
        }

        //5
        //3 1 5 2 6 -> 1 2 3 5 6
        //6
        //4 1 7 9 2 4 -> 1 2 4 7 9

        StringBuilder sb = new StringBuilder();
        for (int number : a) {
            if (!b.contains(number)) {
                sb.append(number).append(" ");
            }
        }

        System.out.println(sb.toString().trim());
    }
}