test=int(input())
for _ in range(test):
    n=int(input())
    list1=list(map(int,input().split()))
    for i in range(len(list1)):
        if list1[i-2]>=list1[i-1]+list1[i]:
            print(i,i+1,i+2)
            break
    else:
        print("-1")