#include<fstream>
using namespace std;
int n,nr=-1;
int x[22];
ifstream fin("submultimi.in");
ofstream fout("submultimi.out");
void back()
{
    int i;
    for(i=1;i<=x[0];i++)
        fout<<x[i]<<" ";
    if(x[0])
        fout<<'\n';
    for(i=x[x[0]]+1;i<=n;i++)
    {
        x[++x[0]]=i;
        back();
        x[x[0]]=0;
        x[0]--;
    }
}

int main()
{

fin>>n;
    back();
    return 0;
}