import string def print_rangoli(size): # your code goes here alphabet = string.ascii_lowercase str = alphabet[:size] # abcde

end = len(str)-1
start = len(str)-1

for _ in range(size-1):
    left = "".join(alphabet[i] for i in range(end, start, -1))
    right = "".join(alphabet[j] for j in range(start, end+1, 1))
    complete = "-".join(left + right)
    print(complete.center(1 + 4*(size-1),'-'))
    start -= 1
    jump += 2

end = len(str)-1
start = 0

jump = 0
for _ in range(size):
    left = "".join(alphabet[i] for i in range(end, start, -1))
    right = "".join(alphabet[j] for j in range(start, end+1, 1))
    complete = "-".join(left + right)
    print(complete.center(1 + 4*(size-1),'-'))
    start += 1

if name == 'main': n = int(input()) print_rangoli(n)