{}
import java.util.*;
public class butterflypattern {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
System.out.println("enter no. of row=");
int n=sc.nextInt();
// upper part of pattern
for(int i=1; i<=2*n-1; i++){
System.out.print("*"+" ");
}
System.out.println();
n--;
for(int i=1; i<=n; i++){
//1st part for star
for(int j=1; j<=n+1-i; j++){
System.out.print("*"+" ");
}
// 2nd part for space
for(int j=1; j<=2*i-1; j++){
System.out.print(" "+" ");
}
// 3rd part for star
for(int j=1; j<=n+1-i; j++){
System.out.print("*"+" ");
}
System.out.println();
}
for(int i=n; i>=1; i--){
//1st part for star
for(int j=1; j<=n+1-i; j++){
System.out.print("*"+" ");
}
// 2nd part for space
for(int j=1; j<=2*i-1; j++){
System.out.print(" "+" ");
}
// 3rd part for star
for(int j=1; j<=n+1-i; j++){
System.out.print("*"+" ");
}
System.out.println();
}
n++;
for(int i=1; i<=2*n-1; i++){
System.out.print("*"+" ");
}
}
}