#include <bits/stdc++.h>
#ifdef LOCAL
#include <debug.hpp>
#else
#define debug(...) void(0)
#endif

using namespace std;

typedef long long ll;
#define all(x) begin(x), end(x)
constexpr int INF = (1 << 30) - 1;
constexpr long long IINF = (1LL << 60) - 1;
constexpr int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};

template <class T> istream& operator>>(istream& is, vector<T>& v) {
    for (auto& x : v) is >> x;
    return is;
}

template <class T> ostream& operator<<(ostream& os, const vector<T>& v) {
    auto sep = "";
    for (const auto& x : v) os << exchange(sep, " ") << x;
    return os;
}

template <class T, class U = T> bool chmin(T& x, U&& y) { return y < x and (x = forward<U>(y), true); }

template <class T, class U = T> bool chmax(T& x, U&& y) { return x < y and (x = forward<U>(y), true); }

template <class T> void mkuni(vector<T>& v) {
    sort(begin(v), end(v));
    v.erase(unique(begin(v), end(v)), end(v));
}

template <class T> int lwb(const vector<T>& v, const T& x) { return lower_bound(begin(v), end(v), x) - begin(v); }

const int MAX = 10010;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int N, H, X;
    cin >> N >> H >> X;
    int G;
    cin >> G;
    vector<int> g(G);
    for (int& x : g) cin >> x;
    int B;
    cin >> B;
    vector<int> b(B);
    for (int& x : b) cin >> x;

    sort(all(g));
    sort(all(b));
    vector<int> cand;
    cand.emplace_back(0);
    cand.emplace_back(N);
    for (int& x : g) {
        for (int i = 0; i <= X; i++) {
            if (x - i > 0) {
                cand.emplace_back(x - i);
            }
        }
    }
    for (int& x : b) {
        for (int i = 0; i <= X; i++) {
            if (x - i > 0) {
                cand.emplace_back(x - i);
            }
        }
    }
    mkuni(cand);
    int len = cand.size();
    chmin(H, MAX);
    vector dp(len, vector<int>(H + 1, -INF));
    dp[0][0] = 0;
    for (int i = 0, p = 0, q = 0, k = 0; i < len; i++) {
        while (p < G and g[p] < cand[i]) p++;
        while (q < B and b[q] < cand[i]) q++;
        int add = 0;
        if (p < G and g[p] == cand[i]) add++;
        if (q < B and b[q] == cand[i]) add--;
        int to = cand[i] + X;
        while (k < len and cand[k] < to) k++;
        for (int j = 0; j <= H; j++) {
            int& val = dp[i][j];
            if (val == -INF) continue;
            val += add;
            if (i + 1 < len) chmax(dp[i + 1][j], val);
            if (k < len and cand[k] == to and j + 1 <= H) chmax(dp[k][j + 1], val);
        }
    }

    int ans = *max_element(all(dp.back()));
    cout << ans << '\n';
    return 0;
}