#include <iostream>
#include <fstream>

using namespace std;

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

int n,a[100];

void back(int k){
    int i ,j;
    for (i=a[k-1]+1;i<=n;i++){
        a[k]=i;
        if (k<=n){
        for (j=1;j<=k;j++)
            g<<a[j]<<" ";
        g<<'\n';
        }
        back(k+1);
    }
}

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