#include <bits/stdc++.h>
using namespace std;
 
typedef long long int ll;
int main(){
	ll t;
	cin>>t;
	while(t--){
		ll n;
		cin>>n;
		if(n%2!=0){
		ll b[n+1] = {0};
		for(ll i=1;i<=n;i++){
			b[i] = i-1;
		}
		b[1] = n;
		
		//RRRRR
		for(ll i=1;i<=n;i++){
			cout<<b[i]<<" ";
		}
		}else{
			cout<<"-1";
		}
		cout<<"\n";
	}
	
	return 0;
}