#include <bits/stdc++.h>
using namespace std;
const long long inf = 1e16;
const long long MAXN = 1e6;
const double pi = acos(-1);
long long n, l, r, l1, r1, mx = -1e9, mx1 = -1e9, k, h, a[200001], col2;
int main() {
  long long t;
  cin >> t;
  while (t--) {
    cin >> n;
    long long fl = 0;
    for (long long i = 0; i < n; i++) {
      cin >> a[i];
    }
    for (long long i = n - 1; i >= 1; i--) {
      if (a[i] < a[i - 1] + a[i - 2]) {
        cout << i - 1 << " " << i << " " << i + 1 << "\n";
        fl = 1;
        break;
      }
    }
    if (fl == 0)
      cout << "-1"
           << "\n";
  }
  return 0;
}
