import java.util.*;
import java.lang.String;
 
public class Main {
  
 
    public static void main(String[] args) {
 
        Scanner in = new Scanner(System.in);
        int t = in.nextInt();
        int i,j,k=0,l=0,r,n,m,c=0,c2=0,x,y,z,p,q,s=0;
    
        
        for(i=0;i<t;i++)
        {n=in.nextInt();
          c=0;
          int a[]=new int[n];
          for(j=0;j<n;j++)
          a[j]=in.nextInt();
          
          for(j=0;j<n-2;j++)
          {s=0;
              for(k=j+1;k<n-1;k++)
              {
                  s=a[i]+a[j];
                  for(l=k+1;l<n;l++)
                  {
                      if(s<a[l])
                      {c++;
                          if(c>0)
                          break;
                        }
                    }
                    if(c>0)
                          break;
                  
                }
                if(c>0)
                          break;
            }
          if(c==0)
          System.out.println(-1);
          else
          System.out.println((j+1) +" " + (k+1)+" " +(l+1));
          
}
}}
       