/* package codechef; // don't place package name! */

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

/* Name of the class has to be "Main" only if the class is public. */
public class Codechef
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner scanner = new Scanner(System.in);
		int t = scanner.nextInt();
    while(t-->0) {
      int n = scanner.nextInt();
      int[] arr = new int[n];
      int i=0, j=0, k=0;
      boolean flag = true;

      for(i=0; i<n; i++) {
        arr[i] = scanner.nextInt();
      }

      for(i=0; i<n && flag; i++) {
        k = n-1;
        for(j=i+1; j<n && flag; j++) {
          while(k>j && flag) {
             flag = arr[k] < arr[i] + arr[j];
             k--;
          } 
        }
      }

      System.out.println( (flag? "-1": ((i+1)+" "+(j+1)+" "+(k+1))));

    }

		scanner.close();
	}
}
