Выровнять длину строки

import math
 
words = []
 
 
def complete(w, n):
    l = (n - len(w)) / 2
    return '-' * math.floor(l) + w + '-' * math.ceil(l)
 
 
while True:
    word = input('word')
    if word == '':
        break
    words.append(word)
max = max(len(word) for word in words)
print(*(complete(word, max) for word in reversed(words)), sep='\n')

*a, = iter(input, '')
ma = len(max(a, key=len))
 
fmt = ('{:-^' + str(ma) + '}') + ('\n{:-^'+str(ma)+'}') * (len(a) - 1)
print(fmt.format(*a[::-1]))

print('\n'.join(i.center(ma, '-') if len(i) % 2 != 0 else f'{i}-'.center(ma, '-') for i in a))

s = input()
slova = []
while s != '':
    slova.append(s)
    s = input()
len_max = len(max(slova, key=len))
slova.reverse()
for i in slova:
    i = (len_max - len(i)) // 2 * '-' + i + (len_max - len(i) + 1) // 2 * '-'
    print(i)

s = input()
len_max=len(s)
slova = []
while s != '':
    slova.append(s)
    s = input()
    len_max = max(len_max,len(s))
for i in range(-1,-len(slova)-1,-1):
     w=slova[i]
     print((len_max - len(w)) // 2 * '-' + w + (len_max - len(w) + 1) // 2 * '-')