import java.util.Scanner;

public class A {
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int T = scan.nextInt();
        for(int t = 0; t < T; t++){
            int n = scan.nextInt();
            int[] arr = new int[n];
            for(int i = 0; i < n; i++){
                arr[i] = scan.nextInt();
            }
            if(arr[0] + arr[1] >= arr[n-1])
                System.out.println(-1);
            else System.out.println(0 + " " + 1 + " " + (n-1));
        }
    }
}
