#include <bits/stdc++.h>
using namespace std;
void sfsf() {
  ios::sync_with_stdio(0);
  cin.tie(nullptr);
  cout.tie(nullptr);
}
const int mxn = 3e5 + 5, N = 8e1 + 5, mod = 1e9 + 7, inf = 0x3f,
          mod2 = 999119999, mod3 = 1000992299, pow1 = 31, pow2 = 53;
int main() {
  sfsf();
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    vector<int> vi(n);
    for (int i = 0; i < n; i++) cin >> vi[i];
    int a = -1, b, c;
    for (int i = 2; i < n; i++) {
      if (vi[i - 1] + vi[i - 2] <= vi[i]) {
        a = i - 1;
        b = i;
        c = i + 1;
      }
    }
    if (a == -1)
      cout << a << endl;
    else
      cout << a << " " << b << " " << c << endl;
  }
  return 0;
}
