C++ :

#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define fer(i,a,b) for(int i=a;i<=b;++i)
#define der(i,a,b) for(int i=a;i>=b;--i)
#define all(x) (x).begin(),(x).end()
#define pll pair<int,int>
#define et  cout<<'\n'
#define xx first
#define yy second
using namespace std;
template <typename _Tp>void input(_Tp &x){
    char ch(getchar());bool f(false);while(!isdigit(ch))f|=ch==45,ch=getchar();
    x=ch&15,ch=getchar();while(isdigit(ch))x=x*10+(ch&15),ch=getchar();
    if(f)x=-x;
}
template <typename _Tp,typename... Args>void input(_Tp &t,Args &...args){input(t);input(args...);}
vector<pll> v;

signed main(){
    int A,B,n,m,k;
    input(A,B,n,m,k);
    int x;
    fer(i,1,n){
        cin>>x;
        v.pb({x,1});
    }
    fer(i,1,m){
        cin>>x;
        v.pb({x,2});
    }
    fer(i,1,k){
        cin>>x;
        v.pb({x,0});
    }
    sort(v.begin(),v.end(),greater<pll>());
    int sum=0;
    int res=0;
    int jian=0,nu=0;

    for(auto t:v){
        if(t.second==1){
            if(jian<A){
                res+=t.first;
                jian++;
                sum++;
            }
        }
        else if(t.second==2){
            if(nu<B){
                res+=t.first;
                nu++;
                sum++;
            }
        }
        else{
            res+=t.first;
            sum++;
        }

        if(sum==A+B) break;
    }
    cout<<res<<endl;
}

Python :

# coding=utf-8
s=sorted;(x,y,*_),a,b,c=eval('map(int,input().split()),'*4)
print(sum(s(s(a)[-x:]+s(b)[-y:]+[*c])[-x-y:]))