import java.util.Scanner;

public class BadTriangle {

	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int t=sc.nextInt();
		while(t-->0)
		{
			int n=sc.nextInt();
			int arr[]=new int[n];
			for(int i=0;i<n;i++)
			{
				arr[i]=sc.nextInt();
			}
			for(int i=0;i<=n-3;i++)
			{
				int j=i+1;
				if(arr[i]+arr[j]<=arr[n-1])
				{
					System.out.print(i+1+" "+(j+1)+" "+n);
					System.out.println();
					break;
				}
				else
				{
					System.out.print("-1");
					System.out.println();
					break;
				}
			}
			
			
		}
		

	}

}
