#include <iostream>
using namespace std;
int main()
{
   int n;
   cin >> n;

   for ( int j = 0 ; j < n ; j ++ )
   {
      for ( int i = 0 ; i < n ; i ++ )
      {
           if ( (j ==  n - 1) || (j == 0) || (i == n - 1) || (i == 0) || (i == j) || (i + j == n - 1) )
           {
               cout <<"*";
           }
           else 
           {
               cout <<" ";
           }
      }

      cout <<'\n';
   }




   return 0;
}