__author__ = 'Avinash'


# Python3 program to print alphabet pattern U

# *             *
# *             *
# *             *
# *             *
# *             *
# *             *
# *             *
#   * * * * * *

def print_pattern(n):
    for row in range(n):
        for column in range(n):
            if(
                    # first column
                    (column == 0 and row != n-1) or

                    # last column
                    (column == n-1 and row != n-1) or

                    # last row
                    (row == n-1 and column != 0 and column != n-1)
            ):
                print("*", end=" ")
            else:
                print(" ", end=" ")
        print()


size = int(input("Enter any size: \t"))

if size < 8:
    print("Enter a size minimum of 8")
else:
    print_pattern(size)