#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  cin >> t;
  while (t--) {
    long long int n;
    cin >> n;
    long long int arr[n];
    for (int i = 0; i < n; i++) {
      cin >> arr[i];
    }
    long long int flag = -1;
    for (int i = n - 1; i > 1; i--) {
      if (arr[i] >= arr[i - 1] + arr[i - 2]) {
        flag = 0;
        cout << i - 1 << " " << i << " " << i + 1 << endl;
        break;
      }
    }
    if (flag == -1) {
      cout << "-1" << endl;
    }
  }
  return 0;
}
