using System;

class Program {
    static void Main() {
        int[] n = new int[3];
        string[][] val = new string[3][];
        int count = 0;

        for(int i = 0; i < 3; i++) {
            n[i] = int.Parse(Console.ReadLine());
            val[i] = Console.ReadLine().Split(' ');
        }

        for(int i = 0; i < n[0]; i++) {
            for(int k = 0; k < n[1]; k++) {
                if(val[0][i] == val[1][k]) {
                    for(int j = 0; j < n[2]; j++) {
                        if(val[0][i] == val[2][j]) {
                            count++;
                            break;
                        }
                    }
                }
            }
        }

        Console.WriteLine(count);
    }
}