#include <iostream>
#include <vector>
#include <cmath>
using namespace std;
 
int main() {
	// your code goes here
	int t;
	cin>>t;
	while(t--)
	{
		int n,k;
		vector<int> a;
		cin>>n>>k;
		for (int i=1;i<=n;i++)
		a.push_back(i);
 
		if (k<=floor(n/2))
		{
			vector<int> b(a.begin(),a.begin()+n-k),c(a.begin()+n-k,a.end());
			for (int i=1;i<=k;i++)
			{
				b.insert(b.begin()+i,c[i-1]);
			}
			for(int i=0;i<n;i++)
			{
				cout<<b[i]<<' ';
			}
			cout<<endl;
		}
		else
		{
			cout<<-1<<endl;
		}
	}
	return 0;
}

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NQoxIDAKNSAyCjYgNgoyIDEKNiAxCg==

5
1 0
5 2
6 6
2 1
6 1