#include <stdio.h>

void printSquare(int n)
{
    for (int i = 0; i<n; i++)
        {
            for (int j = 0; j < n; j++)
                {

                    if (i % 2 == 0)
                        {
                            if (i == 0 || i == n - 1)
                        {
                            printf("%c", '*');
                            printf(" ");
                        }
                    else if (j == 0 || j == n - 1)
                        {
                            printf("%c ", '*');
                        }
                        /*
                    else if (i+1 == n - (n / 2) && j+1 == n - (n / 2))
                        {
                            printf("%c ", '*');
                        }*/
                    else
                        {
                            printf("  ");
                        }
                        }
                }
                printf("\n");
        }
}

void printTriangle(char symbol)
{
    int y = 60;
    int x = y *2 - 1;
    for (int i = 0; i< y; i++)
        {
            for (int j = 0; j < x; j++)
                {

                    if(j+1 == x - (x / 2) - i)
                        {
                            printf("%c", symbol);
                        }
                    else if(j+1 == x - (x / 2) + i)
                        {
                            printf("%c", symbol);
                        }
                    else if (i+1 == y)
                        {
                            printf("%c", symbol);
                        }
                    else
                        {
                            printf(" ");
                        }
                }
                printf("\n");
        }
}

void printButterfly(int n)
{
    int width = 2 * n - 1;
    int height = 2 * (n - 2) + 1;

    for(int i = 0;i<height;i++)
        {
            for (int j = 0; j < width; j++)
                {

                    if (i+1 == height - (height / 2))
                        {
                            for (int k = 0; k<(height - (height / 2)); k++)
                            {
                                printf(" ");
                            }
                            printf("@");
                            break;
                        }
                    if(i % 2 == 0)
                        {
                            if (j+1 == width - (width / 2) - 1)
                                {
                                        printf("\\");
                                }
                            else if (j+1 == width - (width / 2))
                                {
                                        printf(" ");
                                }
                            else if (j+1 == width - (width / 2) + 1)
                                {
                                        printf("/");
                                }
                            else
                                {
                                    printf("*");
                                }
                    }
                    else
                        {
                            if (j+1 == width - (width / 2) - 1)
                                {
                                        printf("\\");
                                }
                            else if (j+1 == width - (width / 2))
                                {
                                        printf(" ");
                                }
                            else if (j+1 == width - (width / 2) + 1)
                                {
                                        printf("/");
                                }
                            else
                                {

                                    printf("-");
                                }
                        }
                }
            printf("\n");
        }
}

int main()
{
    int n;
    scanf("%d", &n);

    char symbol;
    //scanf("%c", &symbol);


    printf("\n");
    //printButterfly(n);
    //printTriangle(symbol);
    printSquare(n);

    return 0;
}