import java.util.*;
import java.lang.*;
import java.io.*;

// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        for(int i=0;i<n;i++){
            for(int j=0;j<n-i;j++){
                System.out.print("*");
            }
            for(int j=0;j<2*i;j++){
                System.out.print(" ");
            }
            for(int j=0;j<n-i;j++){
                System.out.print("*");
            }
            System.out.println("");
        }
        for(int i=0;i<n;i++){
            for(int j=0;j<=i;j++){
                System.out.print("*");
            }
            for(int j=0;j<2*n-2*(i+1);j++){
                System.out.print(" ");
            }
            for(int j=0;j<=i;j++){
                System.out.print("*");
            }
            System.out.println("");
        }
    }
}