def printpretty(x):
    for row in a:
        print(' '. join(row))

n = int(input())
a = [['.' for i in range(n)]for j in range(n)]
for i in range(len(a)):
    for j in range(len(a)):
        if i == n // 2 or j == n // 2 or i == j or i == n - j - 1 or j == n - i - 1:
            a[i][j] = '*'
printpretty(a)