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