#include<iostream>

using namespace std;

int n,k,x[100];

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

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