import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int q = in.nextInt();
        for(int a0 = 0; a0 < q; a0++){
            int len = in.nextInt();
            int c = in.nextInt();
            // your code goes here
            if(c > (int)((1.4)*len*(Math.log(len)/Math.log(2)))){
                System.out.println("-1");
            } else if (c==0){
                while(len-->0){
                    System.out.print((len+1)+" ");
                }
                System.out.println();
            }
        }
    }
}