//package educational93;

import java.util.Scanner;

public class A {

    public static  void main(String[] args){
        Scanner in = new Scanner(System.in);

        int t = in.nextInt();
        while(t > 0){
            t --;

            int n = in.nextInt();
            int array[] = new int[n];
            for(int i = 0; i < n; i++){
                array[i] = in.nextInt();
            }
            boolean bingo = false;
            for(int i = 0; i < n; i++){
                for(int j = i + 1;j < n - 1; j++){
                    int k = j + 1;
                    if(array[i] + array[j] > array[k]){
                        System.out.println((i + 1) + " " + (j + 1) + " " + (k + 1));
                        bingo = true;
                        break;
                    }
                }
                if(bingo){
                    break;
                }
            }
            if(!bingo){
                System.out.println(-1);
            }
        }

    }

}
