import java.util.*; 
import java.lang.*; 
import java.io.*;
public class ye
{

	

    public static void main(String args[])
    {
    	Scanner obj = new Scanner(System.in);
    	long t=obj.nextLong();
    	A:while(t-->0)
    	{
    		long n=obj.nextLong();
    		long arr[]= new long[(int)n];
        	for(int i=0;i<(int)n;i++)
        	{
        		arr[i]=obj.nextLong();
        	} 
        	for (int i = 0; i < (int)n-2; i++) 
            {	
            	if (arr[i] + arr[i + 1] < arr[i + 2]) 
                {	
                		i++;
            	    	long j=i+1;
            	    	long k=i+2;
            	    	System.out.println(i+" "+j+" "+k);
            	    	continue A;
            	}
            } 
            System.out.println("-1");
                  
       		
        }
		}
	}


	 

