size = 3
alphabets = [chr(i) for i in range(97,97+size)]
alphabets.reverse()
# print(alphabets)

a = [alphabets[0]]
for i in range(1,len(alphabets)+1):
    a.append('-'.join(alphabets[0:i])+'-'+'-'.join(alphabets[0:i+1][::-1]))
# print("{}".format(a)+"->size = "+"{}".format(len(a)))
s = 0
for i in range(size*2-2,0,-2):
    print('-'*i+a[s]+'-'*i)
    s += 1
print(a[s])
for _ in range(size-1):
    print('-'*i+a[s-1]+'-'*i)
    i += 2
    s -= 1