#include <iostream>
#include <fstream>
using namespace std;

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

int n, v[20], p = 0;

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

void Back(int t)
{
    for(int i = t; i <= n; ++i)
    {
        v[++p] = i;
        Afisare();
        Back(i+1);
        --p;
    }
}

int main()
{
    f >> n;
    Back(1);
}