#include <iostream>
#include <fstream>

using namespace std;

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

int n, m, x[21];

void afisare(int k) {
    for (int i = 1; i <= k; i++)
        fout << x[i] << " ";
    fout << "\n";
}

void back(int k) {
    for (int i = x[k - 1] + 1; i <= n; i++) {
        x[k] = i;
        afisare(k);
        if (x[k] < n)
            back(k + 1);
    }
}

int main()
{
    fin >> n;
    back(1);
    return 0;
}