#include <bits/stdc++.h>
using namespace std;
const long long INF = 1e9;
const long long MAXN = 1e2 + 69;
const long long MOD = 1e9 + 7;
int n, cnt;
char arr[MAXN][MAXN];
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  cin >> n;
  cnt = 1, memset(arr, '*', sizeof arr);
  for (int i = 0; i < n / 2; i++) {
    for (int j = 0; j < cnt; j++) {
      arr[i][n / 2 + j - cnt / 2] = 'D';
    }
    cnt += 2;
  }
  for (int i = 0; i < n / 2; i++) {
    for (int j = 0; j < n; j++) cout << arr[i][j];
    cout << "\n";
  }
  for (int i = 0; i < n; i++) cout << "D";
  cout << "\n";
  for (int i = n / 2 - 1; i >= 0; i--) {
    for (int j = 0; j < n; j++) cout << arr[i][j];
    cout << "\n";
  }
  return cout << '\n', 0;
}
