#include<fstream>
using namespace std;
int main()
{
	//http://infoarena.ro/problema/submultimi
	ifstream fin("submultimi.in");
	ofstream fout("submultimi.out");
	int i,m,n,j;
	fin>>n;
	for(m=1;m<=n;m++)
	{
		for(j=m;j<=n;j++)
		{
			for(i=m;i<=j;i++)
				fout<<i<<" ";
			fout<<endl;
		}
	}
}