#include <iostream>
#include <fstream>

using namespace std;
ifstream in("submultimi.in");
ofstream out("submultimi.out");
const int NMax = 16 + 5;

int N;
int v[NMax];
// v - vector unde se genereaza solutiile

void backT(int);

int main() {
    in>>N;

    backT(1);

    in.close();
    out.close();
    return 0;
}

// functie care genereaza submultimiile prin metoda backtracking
void backT(int idx) {

    for (int k = v[idx-1] + 1;k <= N;++k) {
        v[idx] = k;

        // se afiseaza submultimea
        for (int i=1;i <= idx;++i) {
            out<<v[i]<<' ';
        }
        out<<'\n';

        backT(idx+1);
    }
}