#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long t;
  cin >> t;
  while (t--) {
    long long n;
    cin >> n;
    long long a[n];
    for (long long i = 0; i < n; i++) {
      cin >> a[i];
    }
    int f = 0;
    for (long long i = 2; i < n; i++) {
      if (a[i - 1] + a[i - 2] <= a[i]) {
        cout << i - 1 << " " << i << " " << i + 1 << endl;
        f = 1;
        break;
      }
    }
    if (f == 0) {
      cout << "-1" << endl;
    }
  }
  return 0;
}
