Problem: A sequence of n integers is called a permutation if it contains all integers from 1 to n exactly once.

Given two integers n and k, construct a permutation a of numbers from 1 to n which has exactly k peaks. An index i of an array a of size n is said to be a peak if 1 < i < n and a_i \gt a_{i-1} and a_i \gt a_{i+1}. If such permutation is not possible, then print -1.

Input

The first line contains an integer t (1 ≤ t ≤ 100) — the number of test cases.

Then t lines follow, each containing two space-separated integers n (1 ≤ n ≤ 100) and k (0 ≤ k ≤ n) — the length of an array and the required number of peaks.

Output

Output t lines. For each test case, if there is no permutation with given length and number of peaks, then print -1. Otherwise print a line containing n space-separated integers which forms a permutation of numbers from 1 to n and contains exactly k peaks. 

If there are multiple answers, print any.

Example

Input


5
1 0
5 2
6 6
2 1
6 1


Output


1 
2 4 1 5 3 
-1
-1
1 3 6 5 4 2

Note

In the second test case of the example, we have array a = [2,4,1,5,3]. Here, indices i=2 and i=4 are the peaks of the array. This is because (a_{2} \gt a_{1} , a_{2} \gt a_{3}) and (a_{4} \gt a_{3}, a_{4} \gt a_{5}). 

Solution (in CPP):

Solution:
#include <iostream>
#include <stdlib.h>
#include <string.h>
#include <bits/stdc++.h>
using namespace std;

#define ll long long
int main()
{
    ll t;
    cin>>t;
    while(t--)
    {
        
        ll n,k;
        cin>>n>>k;
       
            if(k > (n-(n/2+1)))
            cout<<"-1";
            else
            {
                ll a[n+1];
                for(ll i=1; i<=n; i++)
                a[i] = i;
                ll c=0;
                for(ll i=2; i<n; i=i+2)
                {
                    if(c==k)
                    break;
                    swap(a[i],a[i+1]);
                    c++;
                    
                }
                for(ll i=1; i<=n; i++)
                cout<<a[i]<<" ";
            }
        
        
        cout<<"\n";
    }
}