# include <fstream>

using namespace std;

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

int n, p;
int v[30];

void backtracking (int k)
{
    if (k == p + 1)
    {
        for (int i = 1; i <= p; i++)
            out << v[i] << ' ';

        out << '\n';

        return;
    }

    for (int i = v[k - 1] + 1; i <= n; i++)
    {
        v[k] = i;

        backtracking(k + 1);
    }
}

int main()
{
    in >> n;

    for (int i = 1; i <= n; i++)
    {
        p = i;
        backtracking(1);
    }

    return 0;
}