import sys
input = lambda : sys.stdin.readline().rstrip()

def answer():
    n = int(input())
    nums = map(int, input().split(" "))
    nums = sorted(enumerate(nums), key=lambda x:x[1])
    
    if nums[0][1] + nums[1][1] <= nums[-1][1]:
        out = " ".join(map(str, sorted([nums[0][0]+1, nums[1][0]+1, nums[-1][0]+1])))
        print(out)
    else:
        print(-1)
   

nn = int(input())
for i in range(nn):
    answer()