#include <bits/stdc++.h>
using namespace std;
int32_t main(void) {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  long long int t = 1;
  cin >> t;
  while (t--) {
    long long int n, m;
    cin >> n;
    long long int ar[n];
    for (long long int i = 0; i < n; i++) cin >> ar[i];
    long long int c = 0;
    for (long long int i = 0; i < n - 2; i++) {
      if (ar[i] + ar[i + 1] <= ar[i + 2]) {
        cout << i + 1 << " " << i + 2 << " " << i + 3 << "\n";
        c = 1;
        break;
      }
    }
    if (c == 0) cout << -1 << "\n";
  }
  return 0;
}
