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#include <bits/stdc++.h>
using namespace std;
ifstream f("submultimi.in");
ofstream g("submultimi.out");
int n;
int x[17];
void afisare(int k){
for (int i = 1; i <= k; i++) {
g << x[i] << " ";
};
g << endl;
}
void bt(int k)
{
for(int i = x[k - 1] + 1; i <= n; i++)
{
x[k] = i;
afisare(k);
if (x[k] < n) {
bt(k + 1);
}
}
}
int main()
{
f >> n;
bt(1);
return 0;
}