t=int(raw_input())
for r in xrange(t):
    n=int(raw_input())
    b= map(int, raw_input().split(" "))
    a=b[0:]
    a.sort()
    if len(a)>=3:
        if a[0]+a[1]<=a[-1]:
            p=b.index(a[0])
            b[p]=-1
            q=b.index(a[1])
            b[q]=-1
            x=b.index(a[-1])
            print p+1,q+1,x+1
        else:
            print -1
    else:
        print -1
    
