

def solve():
	n=int(input())
	arr=[int(i) for i in input().split()]
	arr.sort()
	if(arr[0]+arr[1]<=arr[-1]):
		print(1,2,n)
		return
		
	print(-1)


	   
	    
	
	
test=int(input())

while test:

	solve()
	test-=1    
    
    
    
        