#include <fstream>
using namespace std;

ifstream in { "submultimi.in" };
ofstream out { "submultimi.out" };

int n, sol[20];

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

void backTrack(int k) {
    for (int i { sol[k - 1] + 1 }; i <= n; ++i) {
        sol[k] = i;
        print(k);
        backTrack(k + 1);
    }
}

int main() {
    in >> n;
    backTrack(1);
}