#include <iostream.h>
#include <conio.h>

void main(){
  int q,i,j;
  cin >> q;
  if(q==1){
    cout << "*";
  }
  else{
    for(i=0;i<q;i++){
      cout << "*";
      for(j=0;j<q-2;j++){
        if(i==0 || i==q-1){
          cout << "*";
        }
        else if(i==j+1 || j+i==q-2){
          cout << "*";
        }
        else{
          cout << " ";
        }
      }
      cout << "*";
      cout << endl;
    }
  }
  getch();
}