#include<stdio.h>
int st[20],n;
void back(int k)
{
	int i,j;
	for(i=st[k-1]+1;i<=n;i++)
	{
		st[k]=i;
		for(j=1;j<=k;j++)
			printf("%d ",st[j]);
		printf("\n");
	back(k+1);
	}
}
int main()
{
	freopen("submultimi.in","r",stdin);
	freopen("submultimi.out","w",stdout);
	scanf("%d",&n);
	back(1);
	return 0;
}