ttgt

#include <iostream>
#include <vector>
#include <unordered_set>
#include <string>

using namespace std;

int main() {
int n, m;
cin >> n >> m;

vector<string> all_students(n);
for (int i = 0; i < n; ++i) {
    cin >> all_students[i];
}

unordered_set<string> present_students;
for (int i = 0; i < m; ++i) {
    string name;
    cin >> name;
    present_students.insert(name);
}

for (int i = 0; i < n; ++i) {
    if (present_students.find(all_students[i]) == present_students.end()) {
        cout << all_students[i] << endl;
    }
}

return 0;

}