import java.util.*;
public class ECR_92_A {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int t = sc.nextInt();
        while (t-->0){
            int n = sc.nextInt();
            int[] a = new int[n];
            for (int i = 0; i < n; i++)
                a[i]=sc.nextInt();
            boolean flag=true;
            for (int i = 0; i < n-2; i++) 
                if (a[i]+a[i+1]<=a[i+2] || a[i+2]+a[i+1]<=a[i] || a[i]+a[i+2]<=a[i+1]){
                    flag=false;
                    System.out.println((i+1)+" "+(i+2)+" "+(i+3));
                }
            if(flag)
                System.out.println("-1");
        }
    }
}