#include<iostream>
#include<bits/stdc++.h>
#define ll long long
const int ii=123456789;
using namespace std;
int main(){
int t;cin>>t;
while(t--){
int n,m,k;cin>>n>>m>>k;
int a[n],b[m];
vector<int>v;
for(int &x:a){
cin>>x; v.push_back(x);
}
for(int &x:b){
cin>>x;
v.push_back(x);
}
sort(v.begin(),v.end());
cout<<v[k-1];
cout<<endl;
}
}
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