

def find(a):
    result = []
    for k in range(len(a)):
        i = a[0]
        j = a[1]
        if(i+j<=a[k] or j+a[k] <=i or i+a[k]<=j):
            result = [1,2,k+1]
            return result
    return -1
        
    

t = int(input())
for i in range(t):
    n = int(input())
    a = list(map(int,input().split()))
    answer = find(a)
   
    if(answer!=-1):
        print(*answer)
    else:
        print(answer)
           



                       
