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

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

int N, sol[20];

void afis(int n){
    int i;
    for(i = 1; i <= n; i++){
        out << sol[i] << " ";
    }
    out << "\n";
}

void backt(int k){
    if(k <= N){
        for(int i = sol[k-1] + 1; i <= N; i++){
            sol[k] = i;
            afis(k);
            backt(k + 1);
        }
    }
}

int main()
{
    in >> N;
    backt(1);
    return 0;
}