#include <iostream>
#include <fstream>

using namespace std;

int n, subm[20];
bool block[20];

ifstream fin("submultimi.in");
ofstream fout("submultimi.out");

void backtrack(int pos){
    if(pos == n + 1)
        return;
    for(int i = subm[pos - 1] + 1; i <= n; ++i){
        if(!block[i]){
            subm[pos] = i;
            block[i] = 1;
            for(int j = 1; j <= pos; ++j)
                fout << subm[j] << " ";
            fout << "\n";
            backtrack(pos + 1);
            subm[pos] = 0;
            block[i] = 0;
        }
    }
    return;
}

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