#include<iostream>
#include<algorithm>
#define ll long long
using namespace std;
int main()
{
int t, n, k;
ll temp;
cin>>t;
while(t--)
{
cin>>n;
ll a[n];
for(int i=0; i<n; i++)
cin>>a[i];
cin>>k;
temp = a[k-1];
sort(a, a+n);
cout<<*find(a, a+n, temp)<<endl;
}
return 0;
}
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