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