#include<iostream>
#include<cmath>
using namespace std;
bool judge(int a)
{
	if(a%2==0)
		return false;
	else 
		return true;
}
int main ()
{
	int n;
	cin>>n;
	while(n--)
	{
		int m;
		cin>>m;
		for(int i=1;i<=m;i++)
		{
			if(judge(i))
			cout<<i<<" ";
		}
		cout<<endl;
		for(int i=1;i<=m;i++)
		{
			if(!judge(i))
			cout<<i<<" ";
		}
		cout<<endl;
		if(n!=0)
			cout<<endl;
	}
	return 0;
}