#include <bits/stdc++.h>
using namespace std;
#define ll long long
void mk(){ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);}
 
    int main() {
      mk();
int t;
cin>>t;
while(t--){
 ll n,m,k,mx=0,mn=INT_MAX,sum=0;
  cin>>n>>m>>k;
  vector<int>v1(n),v2(m);
  for(int i=0;i<n;i++){
    cin>>v1[i];
    sum+=v1[i];
    mn=min(mn,(ll)v1[i]);
  }
  for(int a=0;a<m;a++){
    cin>>v2[a];
    mx=max(mx,(ll)v2[a]);
  }
  // for(int a=0;a<v3.size();a++){
  //   cout<<v3[a]<<" ";
  // }
 if(k%2){
  if(mn<mx)
  sum=sum-mn+mx;
 }
  cout<<sum<<"\n";
}
 }

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NAoyIDIgMQoxIDIKMyA0CjEgMSAxMDAwMAoxCjIKNCA1IDExMDM3CjEgMSA0IDUKMSA5IDEgOSA4CjEgMSAxCjIKMQo=

4
2 2 1
1 2
3 4
1 1 10000
1
2
4 5 11037
1 1 4 5
1 9 1 9 8
1 1 1
2
1