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

int n, x[100];

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

void print(int n)
{
    for (int i = 1; i <= n; i++) {
        g << x[i] << ' ';
    }
    g << '\n';
}

void back(int i = 1) {
    for (int j = x[i - 1] + 1; j <= n; j++) {
        x[i] = j;

        print(i);
        back(i + 1);
    }
}

int main()
{
    f >> n; x[0] = 0;

    back();

    return 0;
}