def answ():
	x=int(input())
	s=list(map(int,input().split()))

	a=s[0]
	b=s[1]
	for n in range(x-1,1,-1):
		c=s[n]
		if a+b<c or a+c<b or b+c<a:
			print(1,2,n+1)
			return
	print(-1)

for i in range(int(input())):
	answ()
