for _ in range(int(input())):
    n = int(input())
    a = list(map(int, input().split()))
    a.sort()
    if a[0] + a[1] <= a[-1]:
        print(1, 2, n)
    elif a[0] >= a[-2] + a[-1]:
        print(1, n-1, n)
    else:
        print(-1)
