cf-1398-A

/*    BISMILLAHIR-RAHMANIR-RAHIM
 ____________________________________
|                                    |
|       SHANTO_SUST_SWE-19_029       |
|____________________________________|
*/

#include <bits/stdc++.h>

using namespace std;

#define ll          long long
#define fastio      ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define pb          push_back
#define Pi          acos(-1.0)
#define r0          return 0
#define endl        "\n"
#define show(x)     cout << x << endl
#define take(x)     cin >> x
#define debug       1

int main()
{
    int t;
    cin >> t;
    int n, i;

    while(t--) {
        cin >> n;
        int ara[n];
        for(i = 0; i < n; i++) {
            scanf("%d", &ara[i]);
        }
        if(ara[0] + ara[1] <= ara[n - 1]) {
            printf("%d %d %d\n", 1, 2, n);
        }
        else printf("-1\n");
    }

    r0;
}

//ALHAMDULILLAH