#include <fstream>

using namespace std;

ifstream fin("submultimi.in");
ofstream fout("submultimi.out");

const int NMAX = 20;

int n;
int X[NMAX];

void print(int k)
{
    for (int i = 1; i <= k; ++ i)
        fout << X[i] << " ";
    fout << "\n";
}

void bkt(int k)
{
    for (int i = X[k - 1] + 1; i <= n; ++ i)
        {
         X[k] = i;
         print(k);
         if (k < n)
            bkt(k + 1);
        }
}

int main()
{
    fin >> n;
    fin.close();
    bkt(1);
    fout.close();
    return 0;
}