#include <bits/stdc++.h>

using namespace std;


int main(){
    int q;
    cin >> q;
    for(int a0 = 0; a0 < q; a0++){
        int len;
        int c;
        cin >> len >> c;
        int arr[len];
        int m=len/2;
        int k=1,l=1;
        if(abs(c-len)==1)
        {
            arr[m]=1;  
            for(int i=2;i<=len;i++)
             {
                if(i%2==0)
                {arr[m-l]=i;l++;}
                else
                {arr[m+k]=i;k++;}
            }
            for(int i=0;i<len;i++)
             {
                cout<<arr[i]<<" ";
            }
            cout<<endl;
        }
        else if(abs(c-len)==2)
         {
            for(int i=len;i>0;i--)
             {
                cout<<i<<" ";
            }
            cout<<endl;
        }
        else
         cout<<-1<<endl;
        // your code goes here
    }
    return 0;
}