[NYPC 2023_ Round 1] 메이플스토리 새로운 직업 고르기

import java.io.*;
import java.lang.reflect.Array;
import java.util.*;
import java.math.BigInteger;

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

        int N = Integer.parseInt(br.readLine());
        String [] jobs = new String[N];
        for(int i=0; i<N; i++){
            jobs[i] = br.readLine();
        }


        List<String> jobList = new ArrayList<>(Arrays.asList(jobs));
        int K = Integer.parseInt(br.readLine());
        for(int i=0; i<K; i++){
            String my_jobs = br.readLine();
            jobList.removeAll(Arrays.asList(my_jobs));
        }
        jobs = jobList.toArray(new String[0]);



        int cnt = jobs.length;
        System.out.println(cnt);
        for(int i=0; i<jobs.length; i++)
            System.out.println(jobs[i]);



    }
}