import java.io.*;
import java.util.*;

public class test {
    static double tmp;
    public static void main(String[] args) {  
      Random r=new Random();
      Scanner s=new Scanner(System.in);
      int t=s.nextInt();
      while(t-->0){
      int n=s.nextInt(),k=s.nextInt();
      if(k==0)
      {
        for (int i=0;i<n;i++) {
          System.out.print(i+" ");
        }
      }
      if(k==1){
        System.out.print(2);
        for (int i=1;i<=n && i!=2;i++) {
          System.out.print(i+" ");
        }
      }
      else if(k>=n*Math.log(n)/Math.log(2))
        System.out.println(-1);
      else
        for (int i=0;i<n;i++) {
          System.out.print(r.nextInt()+" ");
        }
    
    System.out.println();
    }
      }
    
    
    static double bs(double l,double r){
        double mid=0;
        while(Math.abs(r-l)>1e-7)
            {
          	  mid=(l+r)/2;
          	  //System.out.println("mid is "+mid);
             if(Math.sin(mid)+mid+Math.exp(mid)<tmp)
            l=mid;
            else
           	r=mid;
	      }
       return mid;
    }
}