#include <fstream>

using namespace std;
ifstream in("submultimi.in");
ofstream out("submultimi.out");

int n, x[20], m;

void afis(int k){
    for(int i=1 ; i<=k ; ++i)
        out << x[i] << " ";
    out << endl;
}
void back(int k){
    for(int i=x[k-1]+1;i<=n;++i)
    {
        x[k]=i;
        afis(k);
        back(k+1);
    }
}

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