#include <bits/stdc++.h>
using namespace std;
int main() {
  long long t, n;
  cin >> t;
  for (int i = 0; i < t; i++) {
    cin >> n;
    vector<long long> a(n);
    for (int j = 0; j < n; j++) {
      cin >> a[j];
    }
    sort(a.begin(), a.end());
    if (a[0] + a[1] < a[n - 1] || a[1] + a[n - 1] < a[0] ||
        a[0] + a[n - 1] < a[1])
      cout << 1 << " " << 2 << " " << n << endl;
    else
      cout << -1 << endl;
  }
}
