20250723

# n = int(input())
# arr = []
# for i in range(n) :
#     arr.append(int(input()))
#
# print(arr)
# n = int(input())
# a = input().split()
# for i in range(n) :
#     a[i] = int(a[i])
# d=[]
# for i in range(24) :
#     d.append(6)
# for i in range(n) :
#     d[a[i]] += 1
# for i in range(1,24) :
#     print(d[i]-6,end=' ')
# n = int(input())
# arr=list(map(int,input().split()))
# for i in range(n-1,-1,-1) :
#     print(arr[i],end=' ')
# n = int(input())
# arr = list(map(int,input().split()))
# count = 1000000
# for i in range(len(arr)) :
#     if arr[i] < count :
#         count = arr[i]
# print(count)

# c = input()
# c = int(c)
# for i in range(c) :
#     for j in range(c) :
#         print("*",end='')
#     print()
# c = input()
# c = int(c)
# for i in range(c) :
#     if i == 0 or i==c-1:
#         for j in range(c) :
#             print("*",end='')
#     else :
#         for j in range(c) :
#             if j==0 or j==c-1 :
#                 print("*",end='')
#             else :
#                 print(" ",end='')
#     print()
n = input()
n=int(n)
c = 0
for i in range(n) :
    for j in range(n):
        if i==0 or i==n-1 or j==0 or j==n-1 or j==i or :
            print("*", end='')
        else :
            print(" ",end='')
    print("")