#include <iostream>
#include <vector>
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==0)
		{
			cout<<-1<<endl;
			continue;
		}
		if (k<(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