#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int t, n, a, i;
  vector<int> v;
  cin >> t;
  while (t--) {
    cin >> n;
    while (n--) {
      cin >> a;
      v.push_back(a);
    }
    sort(v.begin(), v.end());
    for (i = 2; i < v.size(); i++) {
      if (v[0] + v[1] <= v[i]) {
        cout << 1 << " " << 2 << " " << i + 1 << "\n";
        break;
      }
      if (v[0] + v[1] > v[i]) {
        cout << -1 << "\n";
        break;
      }
    }
    v.clear();
  }
  return 0;
}
