for i in range(int(input())):
  n=int(input())
  a=[int(x) for x in input().split()]
  k=True
  for j in range(n-2):
    
    if a[j]+a[j+1]<=a[j+2]:
      print(j+1,j+2,j+3)
      k=False
  if k:print(-1)