for _ in range(int(input())):
    n=int(input())
    list1=list(map(int,input().split()))
    list1.sort()
    t=0
    for i in range(n-2):
        if(list1[i]+list1[i+1]>list1[i+2]):
            pass
        else:
            print(i+1,i+2,i+3)
            t=1
            break
    if(t==0):
        print(-1)