#include <bits/stdc++.h>

using namespace std;

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

int n;
int st[20];

void Citire()
{
    fin >> n;
}

void Afisare(int top)
{
    for(int i = 1; i <= top; i++)
        fout << st[i] << " ";
    fout << "\n";
}

int Valid(int x, int top)
{
    for(int i = 1; i < top; i++)
        if(st[i] == x) return 0;
    return 1;
}

void Back(int top)
{
    if(top>1) Afisare(top-1);
    for(int i = st[top-1]+1; i <= n; i++)
        if(Valid(i,top))
        {
            st[top] = i;
            Back(top+1);
        }
}

int main()
{
    Citire();
    Back(1);

    fin.close();
    fout.close();
    return 0;
}