#include<iostream>
#include<cstdlib>
using namespace std;
const int MAXN = 4000;
long int A[3][MAXN];
int main() {
    int n, count = 0, y, u[3];
    for (int i = 0; i < 3; i++) {
        cin >> n;
        u[i] = n;
        for (int g = 0; g < n; g++) {
            cin >> A[i][g];
        }
        y = n;
    }
    for (int z = 0; z < y; z++) {
        bool o = 0, q = 0;
        for (int j = 0; j < u[0]; j++) {
            if (A[2][z] == A[0][j]) {
                o = 1;
                break;
            }
        }
        for (int x = 0; x < u[1]; x++) {
            if (A[2][z] == A[1][x])
                q = 1;
        }
        if (q == 1 && o == 1)
            count++;
    }
    cout << count;
    system("pause");
}