import java.util.*;
import java.util.List;
import java.util.Arrays;
public class Test {
  public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    int n = scanner.nextInt();
    int m = scanner.nextInt();
    List<String>usedWord = new ArrayList<>();
    List<String> nWord = new ArrayList<>();
    List<String> mWord = new ArrayList<>();
    for(int i=0;i<n;i++){
        nWord.add(scanner. nextLine());
    }
    for(int i=0;i<m;i++){
        mWord.add(scanner. nextLine());
    }
    int nCount = 0;
    int mCount = -1;
    String lastWord = "";
    String result = "YES";
    boolean nTurn = true;
    while (true) {
        if(nTurn) {
            if (nCount >= nWord.size()) {
                result = "NO";
                break;
            }
            if(usedWord.contains(nWord.get(nCount))) {
                nCount++;
            }else{
                usedWord.add(nWord.get(nCount));
                nTurn = false;
                mCount++;
            }
        }else {
            if (mCount >= mWord.size()) {
                result = "YES";
                break;
            }
            if(usedWord.contains(mWord.get(mCount))) {
                mCount++;
            }else{
                usedWord.add(mWord.get(mCount));
                nTurn = true;
                nCount++;
            }
        }
    }
    System.out.println(result);
  }
}