#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) ||  (j = i && i != 0 && i != n - 1) || (abs (i - j) = n / 2) )
           {
               cout <<"*";
           }
      }

      cout <<'\n';
   }




   return 0;
}