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

int n, v[20];
ofstream g("submultimi.out");

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

void back(int k, int start) {
    for (int i = start; i <= n; i++) {
        v[k] = i;
        afisare(k);
        back(k + 1, i + 1);
    }
}

int main() {
    ifstream f("submultimi.in");
    f >> n;
    f.close();
    back(1, 1);
    g.close();
    return 0;
}