#include <bits/stdc++.h>

using namespace std;

int a[30];

int main()
{
    int n,i;
    ifstream fin("submultimi.in");
    ofstream fout("subultimi.out");
    fin>>n;
    while(a[0]==0)
    {
        ///afisez submultimi
        fout<<"{";
        for(i=1;i<=n;i++)
            if(a[i]==1) fout<<i<<" ";
        fout<<"}"<<"\n";
        ///trec la urmatoarea submultime
        for(i=n;a[i]==1;i--) a[i]=0;
        a[i]=1;
    }
    return 0;
}