Как вставить пробелы и знаки препинания в расшифрованном тексте?

N = str('Qpna, vjg hqqn? yqwnf vcmg').lower().split()
D = []
ans = []
A = str('cdefghijklmnopqrstuvwxyzab ').lower()
B = str('abcdefghijklmnopqrstuvwxyz ')
C = list(zip(A, B))
print(*C)
for i in range(len(N)):
    ans.append(N[i])
for j in range(int(len(ans))):
    for z in ans[j]:
        D.append(z)
 
for j in D:
    for i in range(int(len(C))):
        if j in '.,-=!?1234567890 ':
            continue
        elif j == C[i][0]:
            print(*(C[i][1]), end='')

import string
 
phrase = 'Qpna, vjg hqqn? yqwnf vcmg'
key = 'cdefghijklmnopqrstuvwxyzab'
key += key.upper()
alphabet = string.ascii_lowercase + string.ascii_uppercase
 
def cipher(a1,a2,typ="enc"):
    
    t = {
        "enc":str.maketrans(a1,a2),
        "dec":str.maketrans(a2,a1)
        }
        
    return t[typ]

print(phrase.translate(cipher(alphabet,key,"dec")))
phrase = 'Only, the fool? would take'
print(phrase.translate(cipher(alphabet,key,"enc")))
#'Qpna, vjg hqqn? yqwnf vcmg'

def cipher(phrase,a1,a2,typ="enc"):
    
    if typ == "dec":
        a1,a2 = a2,a1
    trantab = {k:v for k,v in zip(a1,a2)}
    s = ''
    for ch in phrase:
        ch_ = ch.lower()
        casefunc = str.upper if ch.isupper() else str.lower
        s += casefunc(trantab.get(ch_,ch))   
           
    return s
 
phrase = 'Qpna, vjg hqqn? yqwnf vcmg'
key = 'cdefghijklmnopqrstuvwxyzab'
alphabet = string.ascii_lowercase
   
print(cipher(phrase, alphabet, key, 'dec'))
phrase = 'Only, the fool? would take'
print(cipher(phrase, alphabet, key, 'enc'))