#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  for (int i = 1; i <= n - 2; i += 2) {
    for (int j = 0; j < (n - i) / 2; j++) cout << "*";
    for (int j = 0; j < i; j++) cout << "D";
    for (int j = 0; j < (n - i) / 2; j++) cout << "*";
    cout << endl;
  }
  for (int i = 0; i < n; i++) cout << "D";
  cout << endl;
  for (int i = n - 2; i >= 1; i -= 2) {
    for (int j = 0; j < (n - i) / 2; j++) cout << "*";
    for (int j = 0; j < i; j++) cout << "D";
    for (int j = 0; j < (n - i) / 2; j++) cout << "*";
    cout << endl;
  }
  return 0;
}
