import java.util.Scanner;
import java.util.Collections;
import java.util.ArrayList;

public class Timus{
    public static void main(String[] args){

        Scanner in = new Scanner(System.in);
        ArrayList<Integer> arr = new ArrayList<Integer>();
        int n = in.nextInt();
        for (int i = 0; i< n; ++i){
            arr.add(in.nextInt());
        }
        int b = in.nextInt();
        for (int i = 0; i< b; ++i){
            arr.add(in.nextInt());
        }
        b = in.nextInt();
        for (int i = 0; i< b; ++i){
            arr.add(in.nextInt());
        }
        int sum=0;
        int occurrences = 0;
        for(int j =0; j<n; ++j){
            occurrences = Collections.frequency(arr, arr.get(j));
            if (occurrences % 3 == 0){
                sum = sum + occurrences;
            }
        }

        System.out.print(sum/3);


    }
}