#include <bits/stdc++.h>
int main() {
  long long int t;
  scanf("%lld", &t);
  while (t--) {
    long long int a, b, c, d;
    long long int flag = 0;
    scanf("%lld", &a);
    long long int arr[a];
    for (b = 0; b < a; b++) scanf("%lld", &arr[b]);
    if (arr[0] + arr[1] <= arr[a - 1]) flag = 1;
    if (flag != 1)
      printf("-1\n");
    else
      printf("%lld %lld %lld\n", 1, 2, a);
  }
  return 0;
}
