#include <bits/stdc++.h>

using namespace std;
ifstream fin ("submultimi.in");
ofstream fout ("submultimi.out");
int st[25], n, k, v[25];

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

void Back (int top)
{
    for (int i = st[top - 1] + 1; i <= n; i++)
        {
            st[top] = i;
            Afis(top);
            Back(top+ 1);
        }
}

int main()
{
    fin >> n;
    Back(1);

    return 0;
}