#include <iostream>

using namespace std;

void genSubset(int index, int k, int a[], int n)
{
    for (int i = k; i <= n; i++)
    {
        a[index] = i;
        for (int j = 0; j <= index; j++)
            cout << a[j] << " ";
        cout << '\n';
        if (i + 1 <= n)
            genSubset(index + 1, i + 1, a, n);
    }
}

int main()
{
    int n;
    cin >> n;
    int a[n];
    genSubset(0, 1, a, n);
    return 0;
}