#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  cin >> t;
  while (t--) {
    long long int n, i, s, j, x = 0;
    cin >> n;
    long long int a[n];
    for (i = 0; i < n; i++) {
      cin >> a[i];
    }
    for (i = 0; i <= n - 3; i++) {
      s = a[i] + a[i + 1];
      if (s > a[i + 2]) {
        x = 0;
        break;
      } else {
        for (j = i + 2; j < n; j++) {
          if (s <= a[j]) {
            cout << i + 1 << " " << i + 2 << " " << j + 1;
            x = 1;
            break;
          }
        }
      }
      if (x == 1) break;
    }
    if (x == 0) cout << "-1";
    cout << "\n";
  }
  return 0;
}
