#include <bits/stdc++.h>
using namespace std;
void solve() {
  long long int n, x, i, j, k, temp, m;
  cin >> n;
  std::vector<long long int> a(n);
  for (auto &it : a) cin >> it;
  for (i = 1; i < n - 1; ++i) {
    if (a[i] + a[i - 1] < a[i + 1]) {
      cout << i << " " << i + 1 << " " << i + 2 << endl;
      return;
    }
  }
  cout << "-1" << endl;
  return;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  long long int tc;
  cin >> tc;
  while (tc--) {
    solve();
  }
  return 0;
}
