#include <bits/stdc++.h>
using namespace std;
bool check(int i, int j, int k) {
  return i <= j + k and j <= k + i and k <= i + j;
}
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int t = 1;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    vector<int> a(n);
    for (int &x : a) cin >> x;
    bool ok = false;
    for (int i = 0; i <= n - 3; ++i) {
      if (!check(a[i], a[i + 1], a[i + 2])) {
        ok = true;
        cout << i + 1 << ' ' << i + 2 << ' ' << i + 3 << '\n';
        break;
      }
    }
    if (!ok) {
      if (!check(a[0], a[1], a.back())) {
        cout << "1 2 " << n << '\n';
      } else
        cout << "-1\n";
    }
  }
  return 0;
}
