import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.Scanner;
import java.util.Set;

public class E02_SetOfElements {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int firstSize = scanner.nextInt();
        int secondSize = scanner.nextInt();
        scanner.nextLine();

        Set<String> nums = new LinkedHashSet<>();
        Set<String> nums2 = new LinkedHashSet<>();
        Set<String> repeated = new LinkedHashSet<>();

        for (int i = 0; i < firstSize; i++) {
            nums.add(scanner.nextLine());
        }
        for (int i = 0; i < secondSize; i++) {
            nums2.add(scanner.nextLine());
        }

        for (String num : nums) {
            if (nums2.contains(num)) {
                repeated.add(num);
            }
        }
        for (String num : repeated) {
            System.out.println(num + " ");
        }
    }
}