#include<iostream>
#include<fstream>
using namespace std;

int n,k,x[100];

ifstream f("submultimi.in");
ofstream g("submultimi.out");

int scrie(int n)
{
	int i;
	for(i=1;i<=n;i++)
		g<<x[i]<<" ";
	g<<endl;
}

void back(int i)
{
	int j;
	for(j=x[i-1]+1;j<=n;j++)
	{
		x[i]=j;
		scrie(i);
		back(i+1);
	}
}

int main()
{
	x[0]=0;
	f>>n;
	back(1);
	return 0;
}