#include<bits/stdc++.h>
using namespace std;

//* ATCODER
#include<atcoder/all>
using namespace atcoder;
typedef modint998244353 mint;
//*/

/* BOOST MULTIPRECISION
#include<boost/multiprecision/cpp_int.hpp>
using namespace boost::multiprecision;
//*/

typedef long long ll;

#define rep(i, s, n) for (int i = (int)(s); i < (int)(n); i++)
#define rrep(i, s, n) for (int i = (int)(n)-1; i >= (int)(s); i--)

template <typename T> bool chmin(T &a, const T &b) {
	if (a <= b) return false;
	a = b;
	return true;
}

template <typename T> bool chmax(T &a, const T &b) {
	if (a >= b) return false;
	a = b;
	return true;
}

template <typename T> T max(vector<T> &a){
	assert(!a.empty());
	T ret = a[0];
	for (int i=0; i<(int)a.size(); i++) chmax(ret, a[i]);
	return ret;
}

template <typename T> T min(vector<T> &a){
	assert(!a.empty());
	T ret = a[0];
	for (int i=0; i<(int)a.size(); i++) chmin(ret, a[i]);
	return ret;
}

template <typename T> T sum(vector<T> &a){
	T ret = 0;
	for (int i=0; i<(int)a.size(); i++) ret += a[i];
	return ret;
}

int main(){
	int n, h, x; cin >> n >> h >> x;
	int G; cin >> G;
	vector<int> g(G);
	rep(i,0,G) cin >> g[i];
	int B; cin >> B;
	vector<int> b(B);
	rep(i,0,B) cin >> b[i];

	vector<int> score(n);
	rep(i,0,G) score[g[i]-1] = 1;
	rep(i,0,B) score[b[i]-1] = - 1;

	vector<vector<int>> dp(n+1, vector<int>(2001, 1e9));
	dp[0][100] = 0;
	rep(i,0,n){
		rep(j,0,2001){
			if (0 <= j+score[i] && j+score[i] <= 2000){
				if (i+1-x >= 0){
					chmin(dp[i+1][j+score[i]], dp[i+1-x][j] + 1);
				}
				chmin(dp[i+1][j+score[i]], dp[i][j]);
			}
		}
	}
	int ans = -2000;
	rep(i,0,2001){
		if (dp[n][i] <= h){
			chmax(ans, i - 1000);
		}
	}

	cout << ans << '\n';

}