#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  ;
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    vector<pair<int, int>> a;
    for (int i = 0; i < n; i++) {
      int x;
      cin >> x;
      a.push_back({x, i + 1});
    }
    sort(a.begin(), a.end());
    int a1 = a[0].first + a[1].first;
    int a2 = a[n - 1].first;
    if (a1 < a2)
      cout << a[0].second << " " << a[1].second << " " << a[n - 1].second
           << endl;
    else
      cout << -1 << endl;
  }
  return 0;
}
