#include 
using namespace std;
int main() {
    int n;
    cin >> n;

    int maski[n];
    for(int i = 0; i < n; i++) {
        cin >> maski[i];
    }
    sort(maski, maski + n);
    int m;
    cin >> m;
    int zenski[m];
    for(int i = 0; i < m; i++) {
        cin >> zenski[i];
    }
    sort(zenski, zenski + m);

    int R, k;
    cin >> R >> k;
    int res = 0;
    for(int i = 0; i + k - 1 < m; i++) {
        int najgolem = zenski[i] + R;
        int najmal = zenski[i + k - 1] - R;

        int L = 0, R = n;
        while(L < R) {
            int mid = L + (R - L) / 2;
            if(najmal <= maski[mid]) {
                R = mid;
            }
            else {
                L = mid + 1;
            }
        }
        if(L < n and maski[L] < najmal) {
            L++;
        }
        int id2 = L;
        L = 0, R = n;
        while(L < R) {
            int mid = L + (R - L) / 2;
            if(najgolem >= maski[mid]) {
                L = mid + 1;
            }
            else {
                R = mid;
            }
        }
        if(L < n and maski[L] <= najgolem) {
            L++;
        }
        res = max(res, L - id2);
        
    }
    cout << res << endl;
    return 0;
}