import java.io.*;
import java.util.*;

public class Main{
	static Scanner scan = new Scanner(System.in);
	public static void print_list(ArrayList<Object> a)
	{
		for(int i=0;i<a.size();i++)
		{
			System.out.print(a.get(i)+" ");
		}
		System.out.println();
	}
	static void print_array(Object[] nums)
	{
		for(int i=0;i<nums.length;i++)
		{
			System.out.print(nums[i]+" ");
		}
		System.out.println();
	}

	public static long gcd(long a, long b)
	{
		if(b==0)
			return a;
		return gcd(b,a%b);
	}

	public static long sum_of_digits(long n)
	{
		long sum=0;
		while(n>0)
		{
			sum+=n%10;
			n/=10;
		}
		return sum;
	}

	public static void solve()
	{
		int n = scan.nextInt();
		int[] nums = new int[n];
		for(int i=0;i<n;i++)
		{
			nums[i]=scan.nextInt();
		}
		int a = nums[0]+nums[1];
		for(int i=2;i<n;i++)
		{
			if(a<nums[i])
			{
				System.out.println(1+" "+2+" "+(i+1));
				return;
			}
		}
		System.out.println(-1);
	}
	public static void main(String[] args)
	{
		
		int t = scan.nextInt();
		//int t = 1;
		while(t-->0)
		{
			solve();
		}
	}
}
