import java.util.*;

public class Steve1
{
   static Scanner console = new Scanner(System.in);

   public static void main(String[] args) 
   {
        int number=0;
        String numberString="";
        String numberStringTop="";                
        String numberStringBottom="";        
        boolean done = false;
        double numberHalf=0;       
        double numberWorking=0;         
        double x=0;
        
        System.out.print("input number"+ "\n");
        
        number = console.nextInt(); 
        x = number;
        numberHalf = x/2;
        numberWorking = number;
        

                
        while(done == false){                    
            for(int i=number; i >= 1; i--)
            {
                if(i == numberWorking || i == number - numberWorking + 1) numberString = numberString + 

"x";
                else numberString = numberString + ".";
            }
            
            numberStringTop = numberStringTop + numberString + "\n";
            
            if(numberWorking >= numberHalf + 1) numberStringBottom = numberString + "\n" + 

numberStringBottom;
            else;
            
            numberWorking--;
            
            if(numberWorking <= numberHalf) done = true;
            else;           
            
            numberString = "";
                        
        }
        

        
        
        
        
        
        System.out.print("\n" + numberStringTop + numberStringBottom);
  
   }
}