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