#include <bits/stdc++.h>
using namespace std;
using ll = long long;
mt19937 gen(time(0));
void setIO(string name = "") {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
}
int main() {
  setIO();
  int t, n, x;
  cin >> t;
  for (int j = 0; j < t; j++) {
    cin >> n;
    vector<pair<int, int> > a(n);
    for (int i = 0; i < n; i++) {
      cin >> x;
      a[i] = {x, i + 1};
    }
    sort(a.begin(), a.end());
    if (a[n - 1].first >= a[0].first + a[1].first) {
      cout << a[n - 1].second << " " << a[0].second << " " << a[1].second
           << "\n";
    } else {
      cout << "-1\n";
    }
  }
}
