
#include<bits/stdc++.h>
#define fast_cin() ios_base::sync_with_stdio(false); cin.tie(NULL) ;cout.tie(NULL)
using namespace std;

#define ll long long int
#define pb push_back
#define endn "\n"
#define mp make_pair
#define ss second
#define ff first
#define deb(x) cout << #x << " " << x << endl
#define deb1(x,y) cout<<#x<<" "<<x<<" , "<<#y<<" "<<y<<endl
#define deb2(x,y,z) cout<<#x<<" "<<x<<" , "<<#y<<" "<<y<<" , "<<#z<<" "<<z<<endl
const long long INF = 1e18;

int small = INT_MIN;
int large = INT_MAX;

void solve() {
	int n, k;
	cin >> n >> k;
	int a[n];
	int i = 2, j = n;
	a[0] = 1;
	int t = 1;

	while (k-- && t < n - 1) {
		a[t] = j;
		t++;
		j--;
		a[t] = i;
		t++;
		i++;
	}

	if (k != -1) {
		cout << -1;
	}
	else {
		while (i <= j) {
			a[t] = i;
			t++;
			i++;
		}
		for (int x : a) {
			cout << x << " ";
		}
	}
	cout << endn;

}

int main() {

	fast_cin();

	ll T = 1;
	cin >> T;
	while (T--) solve();

	return 0;
}


