//////////////////////
//   shubh_gupta06  //
//////////////////////
#include<bits/stdc++.h>
#include <cstdlib>
#define lli long long int
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#define pb push_back
#define mp make_pair
#define en cout<<endl;
#define inp(a, n) lli a[n]; for (lli i = 0; i < n; i++) cin >> a[i];
#define print(a, n) for (lli i = 0; i < n; i++) cout << a[i] << ' ' ; en
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;

int main()
{
   fast
    lli t;
    cin>>t;
    while(t--)
    {
        lli n;
        cin>>n;
        lli a[n];
        for(int i=0;i<n;i++)
            cin>>a[i];
            int flag=0;
        for(int i=2;i<n;i++)
        {
            if(a[i-1]+a[i-2]<a[i])
            {
                cout<<i+1<<" "<<i<<" "<<i-1<<endl;
                flag=1;
                break;
            }
        }
        if(flag==0)
            cout<<-1<<endl;
    }
    return 0;
}
