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#include <fstream>
using namespace std;
ifstream fin ("submultimi.in");
ofstream fout("submultimi.out");
int n;
int 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);
Back(k + 1);
}
}
int main(){
fin >> n;
Back(1);
return 0;
}