#include <bits/stdc++.h>
#define rep(i, n) for(int i=0; i<(n); ++i)
#define rep2(i, s, n) for(int i=s; i<(n); ++i)
#define ALL(v) (v).begin(), (v).end()

using namespace std;

typedef long long ll;

static const int INTINF = (2147483647 >> 1); // 10^9 + 5000
static const ll LLINF = (9223372036854775807 >> 1);
static const int MAX = 1e5+1;
static const ll MOD = 1e9+7;

namespace Kunitaka{
    template<
        typename TYPE,
        std::size_t SIZE
    >
    std::size_t array_length(const TYPE (&array)[SIZE])
    {
        return SIZE;
    }

    template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
    template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
}
using namespace Kunitaka;
namespace Printer{
    void br(){
        cout << endl;
    }

    void loop_cnt(int i){
        cout << "i = " << i << endl;
    }

    void loop_cnt(int i, int j){
        cout << "i = " << i << ", " << "j = " << j << endl;
    }

    template<class T>
    void print(T x){
        cout << x << endl;
    }

    template<class T, class S>
    void print(T x, S y){
        cout << x << "," << y << endl;
    }

    template<class T, class S, class U>
    void print(T x, S y, U z){
        cout << x << "," << y << "," << z << endl;
    }

    template<class T, class S>
    void print(pair<T, S> p){
        cout << p.first << ", " << p.second << endl;
    }

    template<
        typename TYPE,
        std::size_t SIZE
    >
    void print(const TYPE (&array)[SIZE]){
        int lim = array_length(array);
        for(int i=0; i<lim; i++){
            if(i) cout << " ";
            cout << array[i];
        }
        cout << endl;
    }

    template<class S>
    void print(vector<S> v){
        for(int i=0; i<v.size(); i++){
            if(i) cout << " ";
            cout<< v[i];
        }
        cout << endl;
    }

    template<class S>
    void print(vector<vector<S> > vv){
        for(int i=0; i<vv.size(); i++){
            for(int j=0; j<vv[i].size(); j++){
                if(j) cout << " ";
                cout << vv[i][j];
            }
            cout << endl;
        }
    }

    void yesno(bool x){
        if(x) cout << "Yes" << endl;
        else cout << "No" << endl;
    }
};
using namespace Printer;

int main(int argc, const char * argv[]) {
    //提出時、消す----//
    //--------------//


    // input
    cout << fixed << setprecision(10);
    ll X, Y, A, B, C; cin >> X >> Y >> A >> B >> C;
    vector<ll> p(A), q(B), r(C);
    rep(i, A) cin >> p[i];
    rep(i, B) cin >> q[i];
    rep(i, C) cin >> r[i];

    priority_queue<ll, vector<ll> ,greater<ll> > pq;
    priority_queue<ll> musyoku;
    ll ma = 0;
    rep(i, C){
        ma = max(ma, r[i]);
        musyoku.push(r[i]);
    }

    sort(ALL(p), greater<ll>());
    sort(ALL(q), greater<ll>());

    ll ans = 0;
    rep(i, X){
        if(p[i] < ma){
            pq.push(p[i]);
        }
        else{
            ans += p[i];
        }
    }
    rep(i, Y){
        if(q[i] < ma){
            pq.push(q[i]);
        }
        else{
            ans += q[i];
        }
    }

    while(!pq.empty()){
        ll s = pq.top();
        if(musyoku.empty()){
            ans += s;
            pq.pop();
        }
        else{
            ll t = musyoku.top();
            if(s < t){
                pq.pop();
                musyoku.pop();
                ans += t;
            }
            else{
                pq.pop();
                ans += s;
            }
        }
    }

    print(ans);


    
    
    return 0;
}


Measured memory_bytes: 5620