#include <bits/stdc++.h>
using namespace std;
int n;
void print(int x) {
  int ast = (n - x) / 2;
  for (int i = 0; i < ast; i++) {
    cout << "*";
  }
  for (int i = 0; i < x; i++) {
    cout << "D";
  }
  for (int i = 0; i < ast; i++) {
    cout << "*";
  }
  cout << endl;
}
int main(int argc, char const *argv[]) {
  ios_base::sync_with_stdio(false);
  cin >> n;
  int d = 1;
  while (d < n) {
    print(d);
    d += 2;
  }
  print(d);
  d -= 2;
  while (d > 0) {
    print(d);
    d -= 2;
  }
  return 0;
}
