#include <fstream>
using namespace std;

ifstream cin("submultimi.in");
ofstream cout("submultimi.out");

int a[20], n;

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

void backt(int i)
{
    for (int val = a[i - 1] + 1; val <= n; val++)
    {
        a[i] = val;
        afisare(i);
        backt(i + 1);
    }
}

int main()
{
    cin >> n;
    backt(1);
    return 0;
}