#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    bool ans = false;
    vector<int> v(n);
    for (auto &i : v) cin >> i;
    for (int i = 0; i < n - 2; i++) {
      if (v[i] + v[i + 1] <= v[i + 2]) {
        ans = true;
        cout << i + 1 << " " << i + 1 + 1 << " " << i + 2 + 1 << endl;
      }
    }
    if (!ans) cout << -1 << endl;
  }
}
