#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  cin >> t;
  while (t--) {
    long int n;
    cin >> n;
    vector<long long int> a;
    for (long int i = 0; i < n; i++) {
      long long int temp;
      cin >> temp;
      a.push_back(temp);
    }
    long int i;
    for (i = n - 1; i > 1; i--) {
      if (a[i] >= a[0] + a[1]) {
        cout << 0 << " " << 1 << " " << i << endl;
        break;
      }
    }
    if (i == 1) cout << -1 << endl;
  }
}
