#include <bits/stdc++.h>
using namespace std;
const double pi = 3.14159265358979323846;
void fast() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
}
long long n, m;
int32_t main() {
  fast();
  long long T, t;
  cin >> T;
  for (t = 1; t <= T; t++) {
    long long n;
    cin >> n;
    vector<pair<long long, long long> > a(n);
    for (long long i = 0; i < n; i++) {
      cin >> a[i].first;
      a[i].second = i + 1;
    }
    sort(a.begin(), a.end());
    long long f = 0;
    for (long long i = n - 2; i >= 1; i--) {
      if (a[i].first + a[i - 1].first > a[i + 1].first) {
        f = 1;
        vector<long long> ans;
        ans.emplace_back(a[i].second);
        ans.emplace_back(a[i - 1].second);
        ans.emplace_back(a[i + 1].second);
        sort(ans.begin(), ans.end());
        for (long long i : ans) cout << i << " ";
        cout << "\n";
        break;
      }
    }
    if (f == 0) cout << -1 << "\n";
  }
}
