#include <bits/stdc++.h>
using namespace std;
void solve() {
  long long n;
  cin >> n;
  long long a[n + 1];
  for (int i = 1; i <= n; i++) cin >> a[i];
  int i = 1, j = 2, k = 3;
  while (k <= n) {
    if (a[i] + a[j] < a[k]) {
      cout << i << ' ' << j << ' ' << k << endl;
      return;
    }
    i++;
    j++;
    k++;
  }
  cout << "-1" << endl;
}
int main() {
  int t;
  cin >> t;
  while (t--) {
    solve();
  }
}
