#include <iostream>
#include <fstream>
using namespace std;
ifstream in("submultimi.in");
ofstream out("submultimi.out");
int v[20],n,k;

void afis(int k){
    for(int i=1;i<=k;++i) out<<v[i]<<' ';
    out<<'\n';
}

int backtrack(int j){
    for(int i=v[j-1]+1;i<=n;++i){
                v[j]=i;
                afis(j);
                backtrack(j+1);
     }

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