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>
typedef long long ll;
using namespace std;
void gua()
{
    std::ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
}
int main()
{
    gua();
    int T;
    cin>>T;
    while(T--)
    {
        int n,p;
        cin>>n>>p;
        int top=1;
        int tail=n;
        if((n-1)/2<p)
        {
            cout<<"-1"<<endl;
            continue;
        }
        for(int i=0; i<p; i++)
        {
            if(i==0)
            {
                cout<<top<<" ";
                top++;
            }
            cout<<tail<<" ";
            tail--;
            cout<<top<<" ";
            top++;
        }
        for(int i=top; i<=tail; i++)
        {
            cout<<i<<" ";
        }
        cout<<endl;
    }
    return 0;
}