#include <bits/stdc++.h>
using namespace std;
void solve() {
  long long int n;
  cin >> n;
  vector<long long int> arr;
  set<long long int> s;
  for (int i = 0; i < n; i++) {
    long long int val;
    cin >> val;
    arr.push_back(val);
  }
  bool temp = false;
  for (int i = 0; i <= arr.size() - 3; i++) {
    if (arr[i] + arr[i + 1] <= arr[i + 2]) {
      temp = true;
      cout << i + 1 << " " << i + 2 << " " << i + 3 << '\n';
    }
  }
  if (!temp) {
    cout << -1 << '\n';
  }
}
int main() {
  int t;
  cin >> t;
  while (t--) {
    solve();
  }
}
