import sys

tc = int(sys.stdin.readline())
for _ in range(tc):
    n = int(sys.stdin.readline())
    arr = list(map(int, sys.stdin.readline().split()))
    find = False
    for i in range(2, n):
        if arr[i] > arr[0] + arr[1]:
            find = True
            print(0,1,i)
            break
    if not find:
        print(-1)