#include <bits/stdc++.h>
using namespace std;
vector<int> a;
int t;
int n;
int main() {
  cin >> t;
  for (int i = 0; i < t; i++) {
    cin >> n;
    a.resize(n);
    for (int i = 0; i < n; i++) {
      cin >> a[i];
    }
    if (a[0] + a[1] <= a[n - 1]) {
      cout << "1 2 " << n << "\n";
    } else {
      cout << "-1/n";
    }
  }
}
