#include <iostream>
#include <fstream>
using namespace std;
ifstream in("submultimi.in");
ofstream out("submultimi.out");
int v[20]; /// solutia mea
int n;

void backtracking(int poz)
{
    if(poz >= 2)
    {
        for(int i = 1; i < poz; i++)
            out << v[i] << " ";
        out << "\n";
    }
    if(poz == n + 1)
        return;
    for(int i = v[poz - 1] + 1; i <= n; i++)
    {
        v[poz] = i;
        backtracking(poz + 1);
        v[poz] = 0;
    }
}

int main()
{
    in >> n;
    backtracking(1);
    return 0;
}