//별그리기 14
/*
import java.util.*;
public 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 < i+1 ; j++ )
System.out.print("*");
System.out.print("\n");
}
}
}
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
for(int i = n-1 ; i >=0 ; i-- )
{
for(int j = 0 ; j < i+1 ; j++ )
System.out.print("*");
System.out.print("\n");
}
/*for(int i = 0 ; i < n ; i++ )
{
for(int j = 0 ; j < i+1 ; j++ )
System.out.print("*");
System.out.print("\n");
}
}
}
import java.util.*;
public 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 < i+1 ; j++ )
System.out.print("*");
System.out.print("\n");
}
for(int i = n-1 ; i >=0 ; i-- )
{
for(int j = 0 ; j < i+1 ; j++ )
System.out.print("*");
System.out.print("\n");
}
}
}*/
import java.util.*;
public 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 ; j++ )
{
if(n%2==1) System.out.print("*");
else System.out.print(".");
}
System.out.print("\n");
}
}
}