import string
n = int(input())
a = string.ascii_lowercase
# Write your code below
List = []
for i in range(n):
s = "-".join(a[i:n])
List.append(s[::-1]+s[1:])
width = len(List[0])
for i in range(n-1, 0, -1):
print(List[i].center(width, "-"))
for i in range(n):
print(List[i].center(width, "-"))