#include <fstream>

using namespace std;

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

int n, x[100];

void afisare (int a)
{
    int i;
    for (i=1; i<=a; i++){
        if (x[i] != 0)
            fout << x[i] << " ";
    }
    fout << "\n";
}

void bkt (int k)
{
    int i;
    for (i=x[k-1] + 1; i<=n; i++){
        x[k] = i;
        afisare(k);
        bkt(k+1);
    }
}

int main()
{
    fin >> n;
    bkt(n);
    return 0;
}