import string
alpha = string.ascii_lowercase

n = int(input())
L = []
for i in range(n):
    s = "-".join(alpha[i:n])
    L.append((s[::-1]+s[1:]).center(4*n-3, "-"))
print('\n'.join(L[:0:-1]+L))

def print_rangoli(size):
    myStr = 'abcdefghijklmnopqrstuvwxyz'[0:size]
    
    for i in range(size-1, -size, -1):
        x = abs(i)
        if x >= 0:
            line = myStr[size:x:-1]+myStr[x:size]
            print ("--"*x+ '-'.join(line)+"--"*x)

def print_rangoli(size):
    alp = 'abcdefghijklmnopqrstuvwxyz'
    for i in range(size-1,-size,-1):
        temp = '-'.join(alp[size-1:abs(i):-1]+alp[abs(i):size])
        print(temp.center(4*size-3,'-'))
        
    
if __name__ == '__main__':
    n = int(input())
    print_rangoli(n)

import string

size = int(input())
alphabet = string.ascii_lowercase

for i in range(size - 1, 0, -1):
    row = ["-"] * (size * 2 - 1)
    for j in range(0, size - i):
        row[size - 1 - j] = alphabet[j + i]
        row[size - 1 + j] = alphabet[j + i]
    print("-".join(row))

for i in range(0, size):
    row = ["-"] * (size * 2 - 1)
    for j in range(0, size - i):
        row[size - 1 - j] = alphabet[j + i]
        row[size - 1 + j] = alphabet[j + i]
    print("-".join(row))