#include 
#include 
#include 
using namespace std;

int main()
{
    int n, m;
    cin >> n;
    int maski[n];
    vector brojac(200, 0);
    vector pref_sum(200, 0);
    int y = 0;
    for(int i = 0; i < n; i++){
        cin >> maski[i];
        brojac[maski[i]]++;
    }
    for(int i = 0; i <= 90; i++) {
        y += brojac[i];
        pref_sum[i] = y;
    }
    cin >> m;
    int zenski[m];
    
    for(int i = 0; i < m; i++){
        cin >> zenski[i];
    }
    int k, r;
    cin >> r >> k;
    sort(zenski, zenski + m);
    int L = 0;
    int R = k - 1;
    int s = 0;
    for(int i = k - 1; i < m; i++){
        int temp = 0;
        int minimum = zenski[R] - r;
        int maksimum = zenski[L] + r;
        temp = pref_sum[maksimum] - pref_sum[max(minimum - 1, 0)];
        if(temp > s){
            s = temp;
        }
        L++;
        R++;
    }
 
    cout << s << endl;
 
    return 0;
}