bj_10994.py

import sys

sys.stdin = open('bj_10994_in.txt', 'r')
input = sys.stdin.readline

'''
*************
*           *
* ********* *
* *       * *
* * ***** * *
* * *   * * *
* * * * * * *
* * *   * * *
* * ***** * *
* *       * *
* ********* *
*           *
*************
'''

n = int(input().strip())
# 행 수 = 열 수 = 1 + (n-1)*4
size = 1 + (n - 1) * 4
ans = [[' ' for _ in range(cols)] for _ in range(rows)]


# for row in ans:
#     print(row)

def paint(r, c, size):
    # base
    if size < 0:
        return
    # 상하
    for col in range(c, c + size):
        ans[r][col] = '*'
        ans[r + size - 1][col] = '*'
    # 좌우
    for row in range(r, r + size):
        ans[row][c] = '*'
        ans[row][c + size - 1] = '*'

    paint(r + 2, c + 2, size - 4)


paint(0, 0, size)
for row in ans:
    print(''.join(row))