import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    int n = s.nextInt();
    char[] a = new char[n];
    int count = 0;
    for (int i = 0; i < n; i++) {
      a[i] = s.next().charAt(0);
    }
    for (int i = 0; i < n; i++) {
      if (a[i] == s.next().charAt(0)) count++;
    }
    System.out.println(count);
  }
}