#include <algorithm>
#include <bitset>
#include <climits>
#include <cmath>
#include <cstdio>
#include <iomanip>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <vector>

#define MOD 1000000007
#define MOD2 998244353
#define int long long
#define double long double
#define EPS 1e-9
//#define PI 3.14159265358979

#define rep(i, n) for (int i = 0; i < (int)(n); i++)

using namespace std;

template < typename T >
ostream &operator<<(ostream &os, const vector< T > &A) {
	for (int i = 0; i < A.size(); i++)
		os << A[i] << " ";
	os << endl;
	return os;
}
template <>
ostream &operator<<(ostream &os, const vector< vector< int > > &A) {
	int N = A.size();
	int M;
	if (N > 0)
		M = A[0].size();
	for (int i = 0; i < N; i++) {
		for (int j = 0; j < M; j++)
			os << A[i][j] << " ";
		os << endl;
	}
	return os;
}

typedef pair< int, int > pii;
typedef long long ll;

struct edge {
	int from, to, d, c;
	edge(int _from = 0, int _to = 0, int _d = 0, int _c = 0) {
		from = _from;
		to = _to;
		d = _d;
		c = _c;
	}
	bool operator<(const edge &rhs) const {
		return (d == rhs.d) ? (c < rhs.c) : (d < rhs.d);
	}
};
struct aabb {
	int x1, y1, x2, y2;
	aabb(int x1, int y1, int x2, int y2) : x1(x1), y1(y1), x2(x2), y2(y2) {}
};

typedef vector< edge > edges;
typedef vector< edges > graph;
struct flow {
	int to, cap, rev, cost;
	flow(int to = 0, int cap = 0, int rev = 0, int cost = 0) : to(to), cap(cap), rev(rev), cost(cost) {}
};
typedef vector< vector< flow > > flows;

const int di[4] = {0, -1, 0, 1};
const int dj[4] = {-1, 0, 1, 0};
const int ci[5] = {0, 0, -1, 0, 1};
const int cj[5] = {0, -1, 0, 1, 0};
const ll LINF = LLONG_MAX / 2;
const int INF = INT_MAX / 2;
const double PI = acos(-1);

int pow2(int n) { return 1LL << n; }
template < typename T, typename U >
bool chmin(T &x, const U &y) {
	if (x > y) {
		x = y;
		return true;
	}
	return false;
}
template < typename T, typename U >
bool chmax(T &x, const U &y) {
	if (x < y) {
		x = y;
		return true;
	}
	return false;
}

struct initializer {
	initializer() {
		cout << fixed << setprecision(20);
	}
};
initializer _____;

int N, M, K, T, Q, H, W;
signed main() {
	int X, Y, A, B, C;
	cin >> X >> Y >> A >> B >> C;
	vector< int > p(A), q(B), r(C);
	rep(i, A) cin >> p[i];
	rep(i, B) cin >> q[i];
	rep(i, C) cin >> r[i];
	int ans = 0;
	priority_queue< int, vector< int >, greater< int > > qa, qb;
	sort(p.rbegin(), p.rend());
	sort(q.rbegin(), q.rend());
	sort(r.rbegin(), r.rend());
	rep(i, X) {
		ans += p[i];
		qa.push(p[i]);
	}
	rep(i, Y) {
		ans += q[i];
		qb.push(q[i]);
	}
	rep(i, C) {
		if (qa.top() < qb.top()) {
			if (qa.top() < r[i]) {
				ans -= qa.top();
				qa.pop();
				qa.push(r[i]);
				ans += r[i];
			} else if (qb.top() < r[i]) {
				ans -= qb.top();
				qb.pop();
				qb.push(r[i]);
				ans += r[i];
			}
		} else {
			if (qb.top() < r[i]) {
				ans -= qb.top();
				qb.pop();
				qb.push(r[i]);
				ans += r[i];
			} else if (qa.top() < r[i]) {
				ans -= qa.top();
				qa.pop();
				qa.push(r[i]);
				ans += r[i];
			}
		}
	}
	cout << ans << endl;
	return 0;
}

Measured memory_bytes: 4852