import java.util.*;

public class TapRieng {

public static Scanner in = new Scanner(System.in);

public static void testcase() {

List<String> s1 = Arrays.asList(in.nextLine().split(" "));

List<String> s2 = Arrays.asList(in.nextLine().split(" "));

LinkedHashSet<String> set = new LinkedHashSet<>();

for (String x : s1) {

set.add(x);

}

for (String x : s2) {

if (set.contains(x)) {

set.remove(x);

}

}

List<String> s3 = new ArrayList<>(set);

Collections.sort(s3);

for (String x : s3) {

System.out.print(x + " ");

}

System.out.println();

}

public static void main(String args[]) {

int t = Integer.parseInt(in.nextLine());

while (t-- > 0) {

testcase();

}

}

}