#include <fstream>

using namespace std;

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

int n, m, sol[20];
int i;

void write ()
{
    for (i=1; i<=m; i++)
        fout << sol[i] << " ";
    fout << "\n";
}

void back (int k)
{
    int i;
    if (k == m+1)
    {
        write ();
        return;
    }
    for (i=1+sol[k-1]; i<=n-m+k; i++)
    {
        sol[k] = i;
        back (k+1);
    }
}

int main()
{
    fin >> n;
    for (m=1; m<=n; m++)
        back (1);
    return 0;
}