k=int(input())
for i in range(k):
a,b=map(int,input().split())
if a%2==0:
z=a//2-1
else:
z=a//2
if z<b:
print(-1,end='')
else:
c=0
l=[]
for i in range(1,a+1):
l.append(i)
l.sort()
for j in range(a):
if j%2==1:
c+=1
l.insert(j,l.pop())
if c==b:
break
for j in l:
print(j,end=' ')
print()#include <bits/stdc++.h>
using namespace std;
#define fast ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
int main()
{
fast;
long long int t;
long long int n;
long long int a;
long long int k;
long long int kh;
cin>>t;
for(long long int d(1);d<=t;d++){
cin>>n>>k;
if(n<(2*k+1)){
cout<<(-1)<<endl;}
else{
for(long long int i(0);i<(k);i++){
cout<<(i+1)<<" "<<(n-i)<<" ";}
for(long long int i(k);i<(n-k);i++){
cout<<(i+1)<<" ";}
cout<<endl;
}
}
return 0;
}151A - Soft Drinking | 1352A - Sum of Round Numbers |
281A - Word Capitalization | 1646A - Square Counting |
266A - Stones on the Table | 61A - Ultra-Fast Mathematician |
148A - Insomnia cure | 1650A - Deletions of Two Adjacent Letters |
1512A - Spy Detected | 282A - Bit++ |
69A - Young Physicist | 1651A - Playoff |
734A - Anton and Danik | 1300B - Assigning to Classes |
1647A - Madoka and Math Dad | 710A - King Moves |
1131A - Sea Battle | 118A - String Task |
236A - Boy or Girl | 271A - Beautiful Year |
520B - Two Buttons | 231A - Team |
479C - Exams | 1030A - In Search of an Easy Problem |
158A - Next Round | 71A - Way Too Long Words |
160A - Twins | 1A - Theatre Square |
1614B - Divan and a New Project | 791A - Bear and Big Brother |