#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    int arr[n];
    for (int i = 0; i < n; i++) {
      cin >> arr[i];
    }
    sort(arr, arr + n);
    int flag = 0;
    for (int i = 0; i < n - 2; i++) {
      if (arr[i] + arr[i + 1] < arr[i + 2]) {
        cout << i + 1 << " " << i + 2 << " " << i + 3 << endl;
        flag = 1;
        break;
      }
    }
    if (flag == 0) {
      cout << "-1" << endl;
    }
  }
}
