/*
 * zyrch - Rupanshu Yadav
 */
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <fstream>
#include <queue>
#include <deque>
#include <bitset>
#include <iterator>
#include <list>
#include <stack>
#include <map>
#include <set>
#include <functional>
#include <utility>
#include <climits>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <iomanip>
#include <cassert>
#include <sstream>
using namespace std;

typedef long long ll;
typedef long double ld;
typedef double db;
typedef string str;

typedef pair<int, int> pi;
typedef pair<ll,ll> pl;
typedef pair<ld,ld> pd;

typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<ld> vd;
typedef vector<str> vs;
typedef vector<pi> vpi;
typedef vector<pl> vpl;

#define fast_cin() ios_base::sync_with_stdio(false); cin.tie(NULL) 

#define forn(i,a,b) for (int i = (a); i < ll(b); ++i)
#define fo(i,a) forn(i,0,ll(a))
#define rforn(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define ro(i,a) rforn(i,0,a)
#define trav(a,x) for (auto& a: x)

#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define rsz resize
#define ins insert

#define mp make_pair
#define pb push_back
#define eb emplace_back
#define f first
#define s second

void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif

const ll INF = 1e18;

ll mod = 1000000007;
inline ll fast_expo(ll base,ll power,ll modulo=mod){
    base%=modulo;
    if (base<0) base+=modulo;
    ll x=base,cnt=power,ans=1;
    while(cnt){
        if (cnt&1) ans=(ans*x)%modulo;
        x=(x*x)%modulo;
        cnt>>=1;
    }
    return ans;
}

ll takemod(ll a, ll mo){
	a %= mo;
	if(a < 0) a+=mo;
	return a;
}

// if mod is prime
ll modinv(ll a, ll mo){
	return takemod(fast_expo(takemod(a,mo), mo-2, mo), mo);
}

//=========================CODE STARTS HERE=============================//

int main() {
	
	ll x, y, a, b, c;
	scanf("%lld %lld %lld %lld %lld", &x, &y, &a, &b, &c);
	
	vl arr1(a);
	vl arr2(b);
	vl arr3(c);
	
	fo(i, a) {
		scanf("%lld", &arr1[i]);
	}

	fo(i, b) {
		scanf("%lld", &arr2[i]);
	}
	fo(i, c) {
		scanf("%lld", &arr3[i]);
	}
	
	sort(all(arr1), greater<int> ());
	sort(all(arr2), greater<int> ());
	sort(all(arr3), greater<int> ());
	ll p1, p2, p3;
	p1 = p2 = p3 = 0;
	ll t, ans = 0;
	for (ll i = 0; i < x + y; ++i) {
		
		if (p1 < x && p2 < y) {
			t = max(arr1[p1], max(arr2[p2], arr3[p3]));
			if (t == arr1[p1]) {
				ans += arr1[p1];
				++p1;
			}else if (t == arr2[p2]) {
				ans += arr2[p2++];
			}else 
				ans += arr3[p3++];
			
		}else if (p1 < x) {
			t = max(arr1[p1], arr3[p3]);	
			if (t == arr1[p1]) {
				p1++;
			}else p3++;
			ans += t;
		}else if (p2 < y) {
			t = max(arr2[p2], arr3[p3]);	
			if (t == arr2[p2]) {
				p2++;
			}else p3++;
			ans += t;
		}
	}
	
	cout << ans << "\n";
			
		
		
	
	
	return 0; 
}


Measured memory_bytes: 2560