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#include <bits/stdc++.h>
using namespace std;
ifstream fin("submultimi.in");
ofstream fout("submultimi.out");
int n, x[20];
void afisare(int k) {
for(int i = 1; i <= k; i++) {
fout << x[i] << " ";
}
fout << "\n";
}
void back(int k) {
for(int i = x[k - 1] + 1; i <= n; i++) {
x[k] = i;
afisare(k);
if(k < n) {
back(k + 1);
}
}
}
int main() {
fin >> n;
fin.close();
back(1);
return 0;
}