# -*- coding: utf-8 -*-
def solve():
        N= input()
        in_array = raw_input()
        A = [int(each) for each in in_array.strip().split()]
        for i in range(N):
                a = A[i]
                for j in range(i+1,N):
                        b = A[j]
                        for k in range(j+1,N):
                                c = A[k]
                                if a+b <= c or a+c<= b or b+c <= a:
                                        return i+1, j+1, k+1
        print -1


if __name__ == "__main__":
        testcases = input()
        for _ in range(testcases):
                print solve()
