#include<cstdio>

const int N=20;

int n,s[N];

void citire()
{
	freopen("submultimi.in","r",stdin);
	freopen("submultimi.out","w",stdout);
	scanf("%d",&n);
}

void afis(int l)
{
	if (l<2)
		return;
	for (int i=1;i<l;++i)
		printf("%d ",s[i]);
	printf("\n");
}

void back(int l)
{
	afis(l);
	for (int i=s[l-1]+1;i<=n;i++)
	{
		s[l]=i;
		back(l+1);
	}
}

int main()
{
	citire();
	back(1);
	return 0;
}