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<bits/stdc++.h>
using namespace std;
int main()
{
    int t;
    cin>>t;
    while (t--)
    {
        int n,k,i,cunt=0;
        cin>>n>>k;
        if (n%2==1)
        {
            if (n/2<k)
            {
                cout<<"-1"<<endl;
                continue;
            }
        }
        else
        {
            if ((n/2)-1<k)
            {
                cout<<"-1"<<endl;
                continue;
            }
        }
        int a[n];
        for (i=0;i<n;i++)
        {
            a[i]=i+1;
        }
        i=1;
        while (cunt!=k)
        {
            int temp;
            temp=a[i];
            a[i]=a[i+1];
            a[i+1]=temp;
            cunt++;
            i+=2;
        }
        for (i=0;i<n;i++)
        {
            cout<<a[i]<<" ";
        }
        cout<<endl;
    }
}