def generate_pattern(n):
    if n % 2 == 0:
        return
    
    for i in range(n):
        for j in range(n):
            # Conditions for printing '*'
            if i == 0 or i == n - 1 or j == 0 or j == n - 1 or i == j or i + j == n - 1:
                print('*', end='')
            else:
                print(' ', end='')
        print()

# Example usage
n = int(input())
generate_pattern(n)