#include <iostream>
#include <fstream>
using namespace std;
ifstream in("submultimi.in");
ofstream out("submultimi.out");
void afisare(int n, int sol[])
{
    for(int i=1; i<=n; i++)
        out<<sol[i]<<" ";
    out<<'\n';
}
void bkt(int p,int n, int sol[])
{
    int start;

    if(p!=1)
        afisare(p-1,sol);

    if(p==1)
        start=1;
    else
        start=sol[p-1]+1;

    for(int i= start; i<=n; i++)
    {
        sol[p]=i;
        bkt(p+1,n,sol);
    }
}
int main()
{
     int n;
     int sol[18];
     in>>n;
     bkt(1,n,sol);


    return 0;
}