#include <iostream>
#include <fstream>
#include <vector>
#include <iomanip>
#include <cmath>
#include <algorithm>
#include <climits>
using namespace std;

ifstream f ("submultimi.in");
ofstream g ("submultimi.out");

int v[35] , n;

int ok (int nivel)
{
    for (int i = 1 ; i < nivel ; i++)
        if (v[i] == v[nivel])
        return false;
    return true;
}

void afisare (int a)
{
    for (int i = 1 ; i <= a ; i++)
        g << v[i] << " ";
    g << '\n';
}

void bkt (int nivel)
{
    for (int i = v[nivel - 1] + 1 ; i <= n ; i++)
    {
        v[nivel] = i;
        if (ok (nivel))
        {
            afisare (nivel);
            bkt (nivel + 1);
        }
    }
}

int main()
{
    f >> n;
    bkt (1);
    return 0;
}