#pragma GCC optimize("O3")
#pragma GCC target("avx")
#pragma GCC optimize("unroll-loops")
#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define LL long long
#define DB double
#define ST string
#define BS bitset
#define VE vector
#define VL vector<LL>
#define VP vector<pair<LL,LL>>
#define VVL vector<vector<LL>>
//#define PQ priority_queue
#define PQS priority_queue<LL,vector<LL>,greater<LL>>
#define PB push_back
#define POB pop_back
#define PF push_front
#define POF pop_front
#define EB emplace_back
#define MP make_pair
#define TS to_string
#define TU to_ullong
#define FOR(i,a,n) for(i=a;i<n;i++)
#define rep(i,n) FOR(i,0,n)
#define ALL(a) a.begin(),a.end()
#define RALL(a) a.rbegin(),a.rend()
#define SORT(a) sort(ALL(a))
#define REV(a) reverse(ALL(a))
#define UB(a,n) *upper_bound(ALL(a),n)
#define LB(a,n) *lower_bound(ALL(a),n)
#define INF 1145141919810364364
#define PI 3.14159265358979
#define MOD 1000000007
//#define MOD 998244353
#define ERR 0.00000000000001
#define NUM 200010
#define FAST cin.tie(0);ios::sync_with_stdio(false)

void Yn(LL a){if(a)printf("Yes\n");else printf("No\n");}
void YN(LL a){if(a)printf("YES\n");else printf("NO\n");}
LL pwmn(LL a,LL n){LL ans=1;while(ans<a)ans*=n;return ans;}
LL GCD(LL a,LL b){LL c=1,tmp=max(a,b);b=min(a,b);a=tmp;while(c!=0){c=a%b;a=b;b=c;}return a;}
LL LCM(LL a,LL b){return a*b/GCD(a,b);}
LL mod(LL a,LL m){if(a<0)return a%m+m;else return a%m;}
LL DIV(LL a,LL d){LL m=MOD,x=1,y=0,k;while(m){k=d/m;d-=k*m;swap(m,d);x-=k*y;swap(x,y);}return mod(a*mod(x,MOD),MOD);}
LL POW(LL a,LL n){LL ans=1;while(n>0){if(n&1)ans=ans*a%MOD;a=a*a%MOD;n>>=1;}return ans;}
LL fact[NUM],finv[NUM],inv[NUM];
void comi(){LL i;fact[0]=fact[1]=1;finv[0]=finv[1]=1;inv[1]=1;FOR(i,2,NUM){fact[i]=fact[i-1]*i%MOD;inv[i]=MOD-inv[MOD%i]*(MOD/i)%MOD;finv[i]=finv[i-1]*inv[i]%MOD;}}
LL com(LL n,LL k){if(n<k||n<0||k<0)return 0;return fact[n]*(finv[k]*finv[n-k]%MOD)%MOD;}
bool cmps(pair<LL,LL> a,pair<LL,LL> b){if(a.second!=b.second)return a.second<b.second;return a.first<b.first;}

typedef struct{LL pid,pnum,rpid[NUM],cpid[NUM],que[NUM];}PQ;
//ポインタ渡し、pid/pnum初期化 忘れずに
LL judge(LL a,LL b,PQ* pq){if(pq->pnum<b||b==1)return 0;return pq->cpid[pq->que[a]]>pq->cpid[pq->que[b]]?1:0;}
void push(LL a,LL n,PQ* pq){LL i=++pq->pid,j=++pq->pnum;pq->rpid[i]=n,pq->cpid[i]=a,pq->que[j]=i;while(judge(j/2,j,pq))pq->que[j]=pq->que[j/2],pq->que[j/=2]=i;}
LL pop(PQ* pq){LL ans=pq->rpid[pq->que[1]],i=1,j;LL n=pq->que[pq->pnum--];pq->que[1]=n;while(judge(i,j=i*2+judge(i*2,i*2+1,pq),pq))pq->que[i]=pq->que[j],pq->que[i=j]=n;return ans;}

int main(){
  FAST;
  LL i,ans=0,X,Y,A,B,C,pa,pb;
  cin>>X>>Y>>A>>B>>C;
  VL p(A),q(B),r(C);
  PQ a,b;
  a.pid=a.pnum=b.pid=b.pnum=0;
  rep(i,A)cin>>p[i];
  rep(i,B)cin>>q[i];
  rep(i,C)cin>>r[i];
  SORT(p);SORT(q);SORT(r);
  REV(p);REV(q);REV(r);
  rep(i,X){
    push(p[i],p[i],&a);
    ans+=p[i];
  }
  rep(i,Y){
    push(q[i],q[i],&b);
    ans+=q[i];
  }
  rep(i,C){
    pa=pop(&a);pb=pop(&b);
    if(pa<=pb&&pa<=r[i]){
      ans-=pa;
      ans+=r[i];
      push(r[i],r[i],&a);
      push(pb,pb,&b);
    }else if(pb<=pa&&pb<=r[i]){
      ans-=pb;
      ans+=r[i];
      push(r[i],r[i],&b);
      push(pa,pa,&a);
    }else break;
  }

  cout<<ans<<endl;
}


Measured memory_bytes: 11520