#include <bits/stdc++.h>
using namespace std;
void solve() {
  int N;
  cin >> N;
  vector<long long int> vec(N);
  for (int i = 0; i < (N); i++) cin >> vec[i];
  ;
  for (int i = 0; i < N - 2; i++) {
    if (vec[i] + vec[i + 1] >= vec[i + 2]) {
      cout << i + 1 << " " << i + 2 << " " << i + 3 << endl;
      return;
    }
  }
  cout << -1 << endl;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int T;
  cin >> T;
  while (T--) {
    solve();
  }
  return 0;
}
