import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int tc = s.nextInt();
        for(int t = 0;t < tc;t++) {
            int n = s.nextInt();
            int[] input = new int[n];
            int sum = 0;
            boolean flag = false;
            for(int i = 0;i < n;i++) {
                input[i] = s.nextInt();
                if(i <= 1) {
                    sum += input[i];
                }
                if(i > 1) {
                    if(sum < input[i]) {
                        flag = true;
                    }
                }
            }
            if(flag) {
                System.out.println(1 + " " + 2 + " " + n);
            }
            else {
                System.out.println("-1");
            }
        }
    }
}